{"id":7347,"date":"2019-07-11T20:45:05","date_gmt":"2019-07-11T17:45:05","guid":{"rendered":"http:\/\/viewonphysics.gr\/?p=7347"},"modified":"2019-07-11T20:45:12","modified_gmt":"2019-07-11T17:45:12","slug":"%ce%b4%cf%85%ce%bd%ce%ac%ce%bc%ce%b5%ce%b9%cf%82-%ce%bc%ce%b5%cf%84%ce%b1%ce%be%cf%8d-%ce%b7%ce%bb%ce%b5%ce%ba%cf%84%cf%81%ce%b9%ce%ba%cf%8e%ce%bd-%cf%86%ce%bf%cf%81%cf%84%ce%af%cf%89%ce%bd-online","status":"publish","type":"post","link":"https:\/\/viewonphysics.gr\/?p=7347","title":{"rendered":"\u0394\u03c5\u03bd\u03ac\u03bc\u03b5\u03b9\u03c2 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u0397\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03ce\u03bd \u03a6\u03bf\u03c1\u03c4\u03af\u03c9\u03bd Online: \u03a3\u03c9\u03c3\u03c4\u03cc-\u039b\u03ac\u03b8\u03bf\u03c2"},"content":{"rendered":"<p><script type=\"text\/javascript\" >\ndocument.addEventListener(\"DOMContentLoaded\", function(event) { \nif(!window.jQuery) alert(\"The important jQuery library is not properly loaded in your site. Your WordPress theme is probably missing the essential wp_head() call. You can switch to another theme and you will see that the plugin works fine and this notice disappears. If you are still not sure what to do you can contact us for help.\");\n});\n<\/script>  \n  \n<div  id=\"watupro_quiz\" class=\"quiz-area single-page-quiz\">\n<p id=\"submittingExam42\" style=\"display:none;text-align:center;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\"><\/p>\n\n<div class=\"watupro-exam-description\" id=\"description-quiz-42\"><p>\u039f\u03b9 20 \u03b5\u03c1\u03c9\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2 \u03a3\u03c9\u03c3\u03c4\u03bf\u03cd - \u039b\u03ac\u03b8\u03bf\u03c5\u03c2 (True-False) \u03c0\u03ac\u03bd\u03c9 \u03c3\u03c4\u03b9\u03c2 \u0394\u03c5\u03bd\u03ac\u03bc\u03b5\u03b9\u03c2 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u0397\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03ce\u03bd \u03c6\u03bf\u03c1\u03c4\u03af\u03c9\u03bd \u03b2\u03b1\u03b8\u03bc\u03bf\u03bb\u03bf\u03b3\u03bf\u03cd\u03bd\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc 1 \u03bc\u03bf\u03bd\u03ac\u03b4\u03b1 \u03b7 \u03ba\u03ac\u03b8\u03b5 \u03bc\u03af\u03b1.<\/p>\n<p>\u038c\u03c4\u03b1\u03bd \u03bf\u03bb\u03bf\u03ba\u03bb\u03b7\u03c1\u03ce\u03c3\u03b5\u03b9\u03c2 \u03c4\u03b9\u03c2 \u03b1\u03c0\u03b1\u03bd\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2 \u03c0\u03ac\u03c4\u03b1 \u03c4\u03bf \"\u0391\u03c0\u03bf\u03c4\u03b5\u03bb\u03ad\u03c3\u03bc\u03b1\u03c4\u03b1\" \u03ba\u03b1\u03b9 \u03b1\u03c5\u03c4\u03cc\u03bc\u03b1\u03c4\u03b1 \u03b8\u03b1 \u03b4\u03b5\u03b9\u03c2 \u03c4\u03b9\u03c2 \u03c3\u03c9\u03c3\u03c4\u03ad\u03c2 \u03b1\u03c0\u03b1\u03bd\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b5\u03c0\u03af\u03b4\u03bf\u03c3\u03ae \u03c3\u03bf\u03c5.<\/p>\n<\/div>\n\n<form action=\"\" method=\"post\" class=\"quiz-form\" id=\"quiz-42\"  enctype=\"multipart\/form-data\" >\n<div class='watu-question ' id='question-1' style=';'><div id='questionWrap-1'  class='   watupro-question-id-501'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>1. <\/span>\u0394\u03cd\u03bf \u03c3\u03b7\u03bc\u03b5\u03b9\u03b1\u03ba\u03ac \u03c6\u03bf\u03c1\u03c4\u03af\u03b1 \u03b1\u03bb\u03bb\u03b7\u03bb\u03b5\u03c0\u03b9\u03b4\u03c1\u03bf\u03cd\u03bd \u03bc\u03b5 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 1,5\u039d. \u0393\u03b9\u03b1 \u03bd\u03b1 \u03b1\u03bb\u03bb\u03b7\u03bb\u03b5\u03c0\u03b9\u03b4\u03c1\u03ac\u03c3\u03bf\u03c5\u03bc\u03b5 \u03bc\u03b5 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 6\u039d, \u03b1\u03c1\u03ba\u03b5\u03af \u03bd\u03b1 \u03c4\u03b1 \u03b1\u03c0\u03bf\u03bc\u03b1\u03ba\u03c1\u03cd\u03bd\u03bf\u03c5\u03bc\u03b5 \u03c3\u03b5 \u03b4\u03b9\u03c0\u03bb\u03ac\u03c3\u03b9\u03b1 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03c4\u03bf\u03c5\u03c2 \u03b1\u03c0\u03cc\u03c3\u03c4\u03b1\u03c3\u03b7.<\/div><input type='hidden' name='question_id[]' id='qID_1' value='501' \/><input type='hidden' id='answerType501' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-501[]' id='answer-id-1493' class='answer   answerof-501 ' value='1493'   \/><label for='answer-id-1493' id='answer-label-1493' class=' answer'><span>True<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-501[]' id='answer-id-1494' class='answer   answerof-501 ' value='1494'   \/><label for='answer-id-1494' id='answer-label-1494' class=' answer'><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-2' style=';'><div id='questionWrap-2'  class='   watupro-question-id-502'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>2. <\/span>\u0394\u03cd\u03bf \u03c3\u03b7\u03bc\u03b5\u03b9\u03b1\u03ba\u03ac \u03c6\u03bf\u03c1\u03c4\u03af\u03b1 \u03b1\u03bb\u03bb\u03b7\u03bb\u03b5\u03c0\u03b9\u03b4\u03c1\u03bf\u03cd\u03bd \u03bc\u03b5 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 1,2\u039d. \u0393\u03b9\u03b1 \u03bd\u03b1 \u03b1\u03bb\u03bb\u03b7\u03bb\u03b5\u03c0\u03b9\u03b4\u03c1\u03ac\u03c3\u03bf\u03c5\u03bd \u03bc\u03b5 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 4,8\u039d \u03b1\u03c1\u03ba\u03b5\u03af \u03bd\u03b1 \u03b1\u03bd\u03c4\u03b9\u03ba\u03b1\u03c4\u03b1\u03c3\u03c4\u03ae\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b1 \u03b4\u03cd\u03bf \u03c6\u03bf\u03c1\u03c4\u03af\u03b1 \u03bc\u03b5 \u03c4\u03b1 \u03b4\u03b9\u03c0\u03bb\u03ac\u03c3\u03b9\u03ac \u03c4\u03bf\u03c5\u03c2.<\/div><input type='hidden' name='question_id[]' id='qID_2' value='502' \/><input type='hidden' id='answerType502' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-502[]' id='answer-id-1495' class='answer   answerof-502 ' value='1495'   \/><label for='answer-id-1495' id='answer-label-1495' class=' answer'><span>True<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-502[]' id='answer-id-1496' class='answer   answerof-502 ' value='1496'   \/><label for='answer-id-1496' id='answer-label-1496' class=' answer'><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-3' style=';'><div id='questionWrap-3'  class='   watupro-question-id-503'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>3. <\/span>\u03a3\u03c4\u03bf \u03bc\u03ad\u03c3\u03bf \u03c4\u03b7\u03c2 \u03b1\u03c0\u03cc\u03c3\u03c4\u03b1\u03c3\u03b7\u03c2 \u03c4\u03c9\u03bd \u03c3\u03b7\u03bc\u03b5\u03b9\u03b1\u03ba\u03ce\u03bd \u03c6\u03bf\u03c1\u03c4\u03af\u03c9\u03bd Q\u00a0\u00a0 \u03ba\u03b1\u03b9 -2Q \u03b2\u03c1\u03af\u03c3\u03ba\u03b5\u03c4\u03b1\u03b9 \u03c4\u03bf \u03c3\u03b7\u03bc\u03b5\u03b9\u03b1\u03ba\u03cc \u03c6\u03bf\u03c1\u03c4\u03af\u03bf q. \u03a3\u03c4\u03bf q \u03b1\u03c3\u03ba\u03b5\u03af\u03c4\u03b1\u03b9 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03ae \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 F \u03bc\u03b5 \u03ba\u03b1\u03c4\u03b5\u03cd\u03b8\u03c5\u03bd\u03c3\u03b7 \u03c0\u03c1\u03bf\u03c2 \u03c4\u03b1 \u03b1\u03c1\u03b9\u03c3\u03c4\u03b5\u03c1\u03ac.<br \/>\r\n<br \/>\r\n<div id=\"attachment_7353\" style=\"width: 331px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-7353\" class=\" wp-image-7353\" src=\"http:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/06\/Electric-Forces-1-300x59.jpg\" alt=\"\" width=\"321\" height=\"63\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/06\/Electric-Forces-1-300x59.jpg 300w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/06\/Electric-Forces-1-768x151.jpg 768w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/06\/Electric-Forces-1.jpg 963w\" sizes=\"auto, (max-width: 321px) 100vw, 321px\" \/><p id=\"caption-attachment-7353\" class=\"wp-caption-text\">\u0395\u03c1\u03ce\u03c4\u03b7\u03c3\u03b7 3<\/p><\/div><\/div><input type='hidden' name='question_id[]' id='qID_3' value='503' \/><input type='hidden' id='answerType503' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-503[]' id='answer-id-1497' class='answer   answerof-503 ' value='1497'   \/><label for='answer-id-1497' id='answer-label-1497' class=' answer'><span>True<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-503[]' id='answer-id-1498' class='answer   answerof-503 ' value='1498'   \/><label for='answer-id-1498' id='answer-label-1498' class=' answer'><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-4' style=';'><div id='questionWrap-4'  class='   watupro-question-id-504'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>4. <\/span>\u03a4\u03bf \u03c6\u03bf\u03c1\u03c4\u03af\u03bf +q \u03b4\u03ad\u03c7\u03b5\u03c4\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b5\u03c0\u03af\u03b4\u03c1\u03b1\u03c3\u03b7 \u03b4\u03c5\u03bd\u03ac\u03bc\u03b5\u03c9\u03bd \u03b1\u03c0\u03cc \u03c4\u03b1 \u03c3\u03b7\u03bc\u03b5\u03b9\u03b1\u03ba\u03ac \u03c6\u03bf\u03c1\u03c4\u03af\u03b1 Q \u03ba\u03b1\u03b9 4Q \u03ba\u03b1\u03b9 \u03b2\u03c1\u03af\u03c3\u03ba\u03b5\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03b1\u03c0\u03cc\u03c3\u03c4\u03b1\u03c3\u03b7 r\/3 \u03b1\u03c0\u03cc \u03c4\u03bf Q. \u03a3\u03c4\u03bf \u03c3\u03b7\u03bc\u03b5\u03af\u03bf \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03c6\u03bf\u03c1\u03c4\u03af\u03bf q \u03b9\u03c3\u03bf\u03c1\u03c1\u03bf\u03c0\u03b5\u03af.<br \/>\r\n<br \/>\r\n<div id=\"attachment_7356\" style=\"width: 315px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/06\/Electric-Forces-2.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-7356\" class=\"wp-image-7356\" src=\"http:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/06\/Electric-Forces-2-300x67.jpg\" alt=\"\" width=\"305\" height=\"68\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/06\/Electric-Forces-2-300x67.jpg 300w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/06\/Electric-Forces-2-768x172.jpg 768w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/06\/Electric-Forces-2.jpg 996w\" sizes=\"auto, (max-width: 305px) 100vw, 305px\" \/><\/a><p id=\"caption-attachment-7356\" class=\"wp-caption-text\">\u0395\u03c1\u03ce\u03c4\u03b7\u03c3\u03b7 4<\/p><\/div><\/div><input type='hidden' name='question_id[]' id='qID_4' value='504' \/><input type='hidden' id='answerType504' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-504[]' id='answer-id-1499' class='answer   answerof-504 ' value='1499'   \/><label for='answer-id-1499' id='answer-label-1499' class=' answer'><span>True<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-504[]' id='answer-id-1500' class='answer   answerof-504 ' value='1500'   \/><label for='answer-id-1500' id='answer-label-1500' class=' answer'><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-5' style=';'><div id='questionWrap-5'  class='   watupro-question-id-505'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>5. <\/span>\u03a4\u03bf\u03c0\u03bf\u03b8\u03b5\u03c4\u03bf\u03cd\u03bc\u03b5 \u03b4\u03cd\u03bf \u03c3\u03b7\u03bc\u03b5\u03b9\u03b1\u03ba\u03ac \u03c6\u03bf\u03c1\u03c4\u03af\u03b1 Q \u03ba\u03b1\u03b9 2Q \u03c3\u03b5 \u03b1\u03c0\u03cc\u03c3\u03c4\u03b1\u03c3\u03b7 r \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03c4\u03bf\u03c5\u03c2, \u03bf\u03c0\u03cc\u03c4\u03b5 \u03b1\u03bb\u03bb\u03b7\u03bb\u03b5\u03c0\u03b9\u03b4\u03c1\u03bf\u03cd\u03bd \u03bc\u03b5 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 F. \u0391\u03bd \u03c3\u03c4\u03b9\u03c2 \u03af\u03b4\u03b9\u03b5\u03c2 \u03b8\u03ad\u03c3\u03b5\u03b9\u03c2 \u03b2\u03ac\u03bb\u03bf\u03c5\u03bc\u03b5 \u03b4\u03cd\u03bf \u03ac\u03bb\u03bb\u03b1 \u03c6\u03bf\u03c1\u03c4\u03af\u03b1 Q\/2 \u03ba\u03b1\u03b9 4Q, \u03b7 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03b1\u03bb\u03bb\u03b7\u03bb\u03b5\u03c0\u03af\u03b4\u03c1\u03b1\u03c3\u03b7\u03c2 \u03b8\u03b1 \u03c0\u03b1\u03c1\u03b1\u03bc\u03b5\u03af\u03bd\u03b5\u03b9 \u03af\u03b4\u03b9\u03b1.<\/div><input type='hidden' name='question_id[]' id='qID_5' value='505' \/><input type='hidden' id='answerType505' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-505[]' id='answer-id-1501' class='answer   answerof-505 ' value='1501'   \/><label for='answer-id-1501' id='answer-label-1501' class=' answer'><span>True<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-505[]' id='answer-id-1502' class='answer   answerof-505 ' value='1502'   \/><label for='answer-id-1502' id='answer-label-1502' class=' answer'><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-6' style=';'><div id='questionWrap-6'  class='   watupro-question-id-507'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>6. <\/span>\u0394\u03cd\u03bf \u03c3\u03b7\u03bc\u03b5\u03b9\u03b1\u03ba\u03ac \u03c6\u03bf\u03c1\u03c4\u03af\u03b1 Q<sub>1<\/sub> \u03ba\u03b1\u03b9 Q<sub>2<\/sub> \u03b2\u03c1\u03af\u03c3\u03ba\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03b1\u03c0\u03cc\u03c3\u03c4\u03b1\u03c3\u03b7 r \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03c4\u03bf\u03c5\u03c2 \u03ba\u03b1\u03b9 \u03b1\u03bb\u03bb\u03b7\u03bb\u03b5\u03c0\u03b9\u03b4\u03c1\u03bf\u03cd\u03bd \u03bc\u03b5 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 F. \u0391\u03bd\u03c4\u03b9\u03ba\u03b1\u03b8\u03b9\u03c3\u03c4\u03bf\u03cd\u03bc\u03b5 \u03c4\u03bf \u03b4\u03b5\u03cd\u03c4\u03b5\u03c1\u03bf \u03c6\u03bf\u03c1\u03c4\u03af\u03bf \u03bc\u03b5 \u03c6\u03bf\u03c1\u03c4\u03af\u03bf \u03af\u03c3\u03bf \u03bc\u03b5 \u03c4\u03bf 1\/4 \u03c4\u03bf\u03c5 Q<sub>2<\/sub>. \u0393\u03b9\u03b1 \u03bd\u03b1 \u03c0\u03b1\u03c1\u03b1\u03bc\u03b5\u03af\u03bd\u03b5\u03b9 \u03b7 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03b1\u03bb\u03bb\u03b7\u03bb\u03b5\u03c0\u03af\u03b4\u03c1\u03b1\u03c3\u03b7\u03c2 F \u03af\u03b4\u03b9\u03b1, \u03b8\u03b1 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03c4\u03bf \u03c6\u03bf\u03c1\u03c4\u03af\u03bf \u03b1\u03c5\u03c4\u03cc \u03bd\u03b1 \u03bc\u03b5\u03c4\u03b1\u03c6\u03b5\u03c1\u03b8\u03b5\u03af \u03c3\u03b5 \u03b1\u03c0\u03cc\u03c3\u03c4\u03b1\u03c3\u03b7 \u03af\u03c3\u03b7 \u03bc\u03b5 \u03c4\u03bf 1\/4 \u03c4\u03bf\u03c5\u00a0 r.<\/div><input type='hidden' name='question_id[]' id='qID_6' value='507' \/><input type='hidden' id='answerType507' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-507[]' id='answer-id-1505' class='answer   answerof-507 ' value='1505'   \/><label for='answer-id-1505' id='answer-label-1505' class=' answer'><span>True<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-507[]' id='answer-id-1506' class='answer   answerof-507 ' value='1506'   \/><label for='answer-id-1506' id='answer-label-1506' class=' answer'><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-7' style=';'><div id='questionWrap-7'  class='   watupro-question-id-508'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>7. <\/span>\u038c\u03c4\u03b1\u03bd \u03ad\u03bd\u03b1 \u03c3\u03ce\u03bc\u03b1 \u03b2\u03c1\u03b5\u03b8\u03b5\u03af \u03bc\u03ad\u03c3\u03b1 \u03c3\u03b5 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03cc \u03c0\u03b5\u03b4\u03af\u03bf \u03c4\u03cc\u03c4\u03b5 \u03b4\u03ad\u03c7\u03b5\u03c4\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b5\u03c0\u03af\u03b4\u03c1\u03b1\u03c3\u03b7 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03bf\u03c3\u03c4\u03b1\u03c4\u03b9\u03ba\u03ae\u03c2 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7\u03c2.<\/div><input type='hidden' name='question_id[]' id='qID_7' value='508' \/><input type='hidden' id='answerType508' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-508[]' id='answer-id-1507' class='answer   answerof-508 ' value='1507'   \/><label for='answer-id-1507' id='answer-label-1507' class=' answer'><span>True<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-508[]' id='answer-id-1508' class='answer   answerof-508 ' value='1508'   \/><label for='answer-id-1508' id='answer-label-1508' class=' answer'><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-8' style=';'><div id='questionWrap-8'  class='   watupro-question-id-509'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>8. <\/span>\u0397 \u03ba\u03b1\u03c4\u03b5\u03cd\u03b8\u03c5\u03bd\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03b4\u03b9\u03b1\u03bd\u03cd\u03c3\u03bc\u03b1\u03c4\u03bf\u03c2 \u03c4\u03b7\u03c2 \u03ad\u03bd\u03c4\u03b1\u03c3\u03b7\u03c2 <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-f2f2f84b04681cc5d75f934f8d558bc4_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#92;&#100;&#105;&#115;&#112;&#108;&#97;&#121;&#115;&#116;&#121;&#108;&#101;&#32;&#92;&#118;&#101;&#99;&#123;&#69;&#125;&#32;\" title=\"Rendered by QuickLaTeX.com\" height=\"16\" width=\"12\" style=\"vertical-align: 0px;\"\/> \u03c4\u03bf\u03c5 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03bf\u03cd \u03c0\u03b5\u03b4\u03af\u03bf\u03c5 \u03c3\u03c5\u03bc\u03c0\u03af\u03c0\u03c4\u03b5\u03b9 \u03bc\u03b5 \u03c4\u03b7\u03bd \u03ba\u03b1\u03c4\u03b5\u03cd\u03b8\u03c5\u03bd\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7\u03c2 <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-5209b2ad3e4060628a5b405047707795_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#92;&#100;&#105;&#115;&#112;&#108;&#97;&#121;&#115;&#116;&#121;&#108;&#101;&#32;&#92;&#118;&#101;&#99;&#123;&#70;&#125;&#32;\" title=\"Rendered by QuickLaTeX.com\" height=\"16\" width=\"12\" style=\"vertical-align: 0px;\"\/> \u03c0\u03bf\u03c5 \u03b1\u03c3\u03ba\u03b5\u03af\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03b4\u03bf\u03ba\u03b9\u03bc\u03b1\u03c3\u03c4\u03b9\u03ba\u03cc \u03c6\u03bf\u03c1\u03c4\u03af\u03bf.<\/div><input type='hidden' name='question_id[]' id='qID_8' value='509' \/><input type='hidden' id='answerType509' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-509[]' id='answer-id-1509' class='answer   answerof-509 ' value='1509'   \/><label for='answer-id-1509' id='answer-label-1509' class=' answer'><span>True<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-509[]' id='answer-id-1510' class='answer   answerof-509 ' value='1510'   \/><label for='answer-id-1510' id='answer-label-1510' class=' answer'><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-9' style=';'><div id='questionWrap-9'  class='   watupro-question-id-510'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>9. <\/span>\u03a4\u03bf \u03bc\u03ad\u03c4\u03c1\u03bf \u03c4\u03b7\u03c2 \u03ad\u03bd\u03c4\u03b1\u03c3\u03b7\u03c2 \u03c3\u03b5 \u03ad\u03bd\u03b1 \u03c3\u03b7\u03bc\u03b5\u03af\u03bf \u03b5\u03bd\u03cc\u03c2 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03bf\u03cd \u03c0\u03b5\u03b4\u03af\u03bf\u03c5 \u03b4\u03b5\u03bd \u03b5\u03be\u03b1\u03c1\u03c4\u03ac\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03bf \u03c6\u03bf\u03c1\u03c4\u03af\u03bf \u03c0\u03bf\u03c5 \u03c5\u03c0\u03ac\u03c1\u03c7\u03b5\u03b9 \u03c3\u03c4\u03bf \u03c3\u03b7\u03bc\u03b5\u03af\u03bf \u03b1\u03c5\u03c4\u03cc.<\/div><input type='hidden' name='question_id[]' id='qID_9' value='510' \/><input type='hidden' id='answerType510' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-510[]' id='answer-id-1511' class='answer   answerof-510 ' value='1511'   \/><label for='answer-id-1511' id='answer-label-1511' class=' answer'><span>True<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-510[]' id='answer-id-1512' class='answer   answerof-510 ' value='1512'   \/><label for='answer-id-1512' id='answer-label-1512' class=' answer'><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-10' style=';'><div id='questionWrap-10'  class='   watupro-question-id-511'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>10. <\/span>\u03a3\u03b5 \u03ad\u03bd\u03b1 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03cc \u03c0\u03b5\u03b4\u03af\u03bf Coulomb \u03b7 \u03ad\u03bd\u03c4\u03b1\u03c3\u03b7 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03bd\u03c4\u03b9\u03c3\u03c4\u03c1\u03cc\u03c6\u03c9\u03c2 \u03b1\u03bd\u03ac\u03bb\u03bf\u03b3\u03b7 \u03c4\u03b7\u03c2 \u03b1\u03c0\u03cc\u03c3\u03c4\u03b1\u03c3\u03b7\u03c2 \u03b1\u03c0\u03cc \u03c4\u03bf \u03c6\u03bf\u03c1\u03c4\u03af\u03bf-\u03c0\u03b7\u03b3\u03ae \u03c0\u03bf\u03c5 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03b5\u03af \u03c4\u03bf \u03c0\u03b5\u03b4\u03af\u03bf.<\/div><input type='hidden' name='question_id[]' id='qID_10' value='511' \/><input type='hidden' id='answerType511' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-511[]' id='answer-id-1513' class='answer   answerof-511 ' value='1513'   \/><label for='answer-id-1513' id='answer-label-1513' class=' answer'><span>True<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-511[]' id='answer-id-1514' class='answer   answerof-511 ' value='1514'   \/><label for='answer-id-1514' id='answer-label-1514' class=' answer'><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-11' style=';'><div id='questionWrap-11'  class='   watupro-question-id-512'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>11. <\/span>\u03a4\u03b1 \u03c6\u03bf\u03c1\u03c4\u03af\u03b1 +Q \u03ba\u03b1\u03b9 -Q \u03b2\u03c1\u03af\u03c3\u03ba\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c0\u03ac\u03bd\u03c9 \u03c3\u03c4\u03b7\u03bd \u03bf\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03b1 \u03b5\u03c5\u03b8\u03b5\u03af\u03b1 x\u0384x. \u0394\u03b5\u03bd \u03c5\u03c0\u03ac\u03c1\u03c7\u03b5\u03b9 \u03c3\u03b7\u03bc\u03b5\u03af\u03bf \u03c4\u03b7\u03c2 \u03b5\u03c5\u03b8\u03b5\u03af\u03b1\u03c2 \u03b1\u03c5\u03c4\u03ae\u03c2 \u03c0\u03bf\u03c5 \u03bd\u03b1 \u03bc\u03b7\u03b4\u03b5\u03bd\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03b7 \u03ad\u03bd\u03c4\u03b1\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03bf\u03cd \u03c0\u03b5\u03b4\u03af\u03bf\u03c5 \u03c0\u03bf\u03c5 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03bf\u03cd\u03bd \u03c4\u03b1 \u03b4\u03cd\u03bf \u03c3\u03b7\u03bc\u03b5\u03b9\u03b1\u03ba\u03ac \u03c6\u03bf\u03c1\u03c4\u03af\u03b1.<br \/>\r\n<br \/>\r\n<div id=\"attachment_7372\" style=\"width: 398px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-7372\" class=\" wp-image-7372\" src=\"http:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-3-300x41.jpg\" alt=\"\" width=\"388\" height=\"53\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-3-300x41.jpg 300w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-3-768x106.jpg 768w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-3-1024x141.jpg 1024w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-3.jpg 1033w\" sizes=\"auto, (max-width: 388px) 100vw, 388px\" \/><p id=\"caption-attachment-7372\" class=\"wp-caption-text\">\u0395\u03c1\u03ce\u03c4\u03b7\u03c3\u03b7 11<\/p><\/div><\/div><input type='hidden' name='question_id[]' id='qID_11' value='512' \/><input type='hidden' id='answerType512' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-512[]' id='answer-id-1515' class='answer   answerof-512 ' value='1515'   \/><label for='answer-id-1515' id='answer-label-1515' class=' answer'><span>True<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-512[]' id='answer-id-1516' class='answer   answerof-512 ' value='1516'   \/><label for='answer-id-1516' id='answer-label-1516' class=' answer'><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-12' style=';'><div id='questionWrap-12'  class='   watupro-question-id-513'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>12. <\/span>\u039f\u03b9 \u03b3\u03c1\u03b1\u03bc\u03bc\u03ad\u03c2 \u03c4\u03b7\u03c2 \u03b5\u03b9\u03ba\u03cc\u03bd\u03b1\u03c2 \u03b1\u03c0\u03b1\u03b5\u03b9\u03ba\u03bf\u03bd\u03af\u03b6\u03bf\u03c5\u03bd \u03c4\u03b9\u03c2 \u03b4\u03c5\u03bd\u03b1\u03bc\u03b9\u03ba\u03ad\u03c2 \u03b3\u03c1\u03b1\u03bc\u03bc\u03ad\u03c2 \u03b5\u03bd\u03cc\u03c2 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03bf\u03cd \u03c0\u03b5\u03b4\u03af\u03bf\u03c5.<br \/>\r\n<br \/>\r\n<div id=\"attachment_7374\" style=\"width: 188px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-4.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-7374\" class=\"wp-image-7374\" src=\"http:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-4-243x300.jpg\" alt=\"\" width=\"178\" height=\"220\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-4-243x300.jpg 243w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-4.jpg 511w\" sizes=\"auto, (max-width: 178px) 100vw, 178px\" \/><\/a><p id=\"caption-attachment-7374\" class=\"wp-caption-text\">\u0395\u03c1\u03ce\u03c4\u03b7\u03c3\u03b7 12<\/p><\/div><\/div><input type='hidden' name='question_id[]' id='qID_12' value='513' \/><input type='hidden' id='answerType513' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-513[]' id='answer-id-1517' class='answer   answerof-513 ' value='1517'   \/><label for='answer-id-1517' id='answer-label-1517' class=' answer'><span>True<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-513[]' id='answer-id-1518' class='answer   answerof-513 ' value='1518'   \/><label for='answer-id-1518' id='answer-label-1518' class=' answer'><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-13' style=';'><div id='questionWrap-13'  class='   watupro-question-id-514'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>13. <\/span>\u03a3\u03c4\u03b7\u03bd \u03c0\u03b1\u03c1\u03b1\u03ba\u03ac\u03c4\u03c9 \u03b5\u03b9\u03ba\u03cc\u03bd\u03b1 \u03c6\u03b1\u03af\u03bd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03bf\u03b9 \u03b4\u03c5\u03bd\u03b1\u03bc\u03b9\u03ba\u03ad\u03c2 \u03b3\u03c1\u03b1\u03bc\u03bc\u03ad\u03c2 \u03b5\u03bd\u03cc\u03c2 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03bf\u03cd \u03c0\u03b5\u03b4\u03af\u03bf\u03c5. \u0397 \u03ad\u03bd\u03c4\u03b1\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c0\u03b5\u03b4\u03af\u03bf\u03c5 \u03c3\u03c4\u03bf \u03c3\u03b7\u03bc\u03b5\u03af\u03bf \u0392 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc\u03b5\u03b3\u03b1\u03bb\u03cd\u03c4\u03b5\u03c1\u03b7 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03ad\u03bd\u03c4\u03b1\u03c3\u03b7 \u03c3\u03c4\u03bf \u03c3\u03b7\u03bc\u03b5\u03af\u03bf \u0391.<br \/>\r\n<br \/>\r\n<div id=\"attachment_7375\" style=\"width: 227px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-5.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-7375\" class=\"wp-image-7375\" src=\"http:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-5-300x275.jpg\" alt=\"\" width=\"217\" height=\"199\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-5-300x275.jpg 300w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-5.jpg 546w\" sizes=\"auto, (max-width: 217px) 100vw, 217px\" \/><\/a><p id=\"caption-attachment-7375\" class=\"wp-caption-text\">\u0395\u03c1\u03ce\u03c4\u03b7\u03c3\u03b7 13<\/p><\/div><\/div><input type='hidden' name='question_id[]' id='qID_13' value='514' \/><input type='hidden' id='answerType514' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-514[]' id='answer-id-1519' class='answer   answerof-514 ' value='1519'   \/><label for='answer-id-1519' id='answer-label-1519' class=' answer'><span>True<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-514[]' id='answer-id-1520' class='answer   answerof-514 ' value='1520'   \/><label for='answer-id-1520' id='answer-label-1520' class=' answer'><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-14' style=';'><div id='questionWrap-14'  class='   watupro-question-id-515'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>14. <\/span>\u03a4\u03bf \u03b4\u03c5\u03bd\u03b1\u03bc\u03b9\u03ba\u03cc \u03c3\u03b5 \u03ad\u03bd\u03b1 \u03c3\u03b7\u03bc\u03b5\u03af\u03bf \u03b5\u03bd\u03cc\u03c2 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03bf\u03cd \u03c0\u03b5\u03b4\u03af\u03bf\u03c5 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03bd\u03ac\u03bb\u03bf\u03b3\u03bf \u03c4\u03bf\u03c5 \u03c6\u03bf\u03c1\u03c4\u03af\u03bf\u03c5 q \u03c0\u03bf\u03c5 \u03b5\u03b9\u03c3\u03ac\u03b3\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf \u03c3\u03b7\u03bc\u03b5\u03af\u03bf \u03b1\u03c5\u03c4\u03cc.<\/div><input type='hidden' name='question_id[]' id='qID_14' value='515' \/><input type='hidden' id='answerType515' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-515[]' id='answer-id-1521' class='answer   answerof-515 ' value='1521'   \/><label for='answer-id-1521' id='answer-label-1521' class=' answer'><span>True<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-515[]' id='answer-id-1522' class='answer   answerof-515 ' value='1522'   \/><label for='answer-id-1522' id='answer-label-1522' class=' answer'><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-15' style=';'><div id='questionWrap-15'  class='   watupro-question-id-516'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>15. <\/span>\u03a4\u03bf \u03c6\u03bf\u03c1\u03c4\u03af\u03bf -Q \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03b5\u03af \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03cc \u03c0\u03b5\u03b4\u03af\u03bf, \u03b5\u03bd\u03c4\u03cc\u03c2 \u03c4\u03bf\u03c5 \u03bf\u03c0\u03bf\u03af\u03bf\u03c5 \u03c5\u03c0\u03ac\u03c1\u03c7\u03bf\u03c5\u03bd \u03b4\u03cd\u03bf \u03cc\u03bc\u03bf\u03b9\u03b1 \u03c6\u03bf\u03c1\u03c4\u03af\u03b1 +q \u03c3\u03c4\u03b1 \u03c3\u03b7\u03bc\u03b5\u03af\u03b1 \u0391 \u03ba\u03b1\u03b9 \u0392. \u0397 \u03b4\u03c5\u03bd\u03b1\u03bc\u03b9\u03ba\u03ae \u03b5\u03bd\u03ad\u03c1\u03b3\u03b5\u03b9\u03b1 \u03c4\u03bf\u03c5 \u03c6\u03bf\u03c1\u03c4\u03af\u03bf\u03c5 \u03c3\u03c4\u03bf \u0392 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc\u03b5\u03b3\u03b1\u03bb\u03cd\u03c4\u03b5\u03c1\u03b7 \u03b1\u03c0\u03cc \u03b1\u03c5\u03c4\u03ae\u03bd \u03c4\u03bf\u03c5 \u03c6\u03bf\u03c1\u03c4\u03af\u03bf\u03c5 \u03c0\u03bf\u03c5 \u03b2\u03c1\u03af\u03c3\u03ba\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf \u0391.<br \/>\r\n<br \/>\r\n<div id=\"attachment_7393\" style=\"width: 324px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-6.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-7393\" class=\"wp-image-7393\" src=\"http:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-6-300x148.jpg\" alt=\"\" width=\"314\" height=\"155\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-6-300x148.jpg 300w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-6-768x380.jpg 768w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-6.jpg 837w\" sizes=\"auto, (max-width: 314px) 100vw, 314px\" \/><\/a><p id=\"caption-attachment-7393\" class=\"wp-caption-text\">\u0395\u03c1\u03ce\u03c4\u03b7\u03c3\u03b7 15<\/p><\/div><\/div><input type='hidden' name='question_id[]' id='qID_15' value='516' \/><input type='hidden' id='answerType516' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-516[]' id='answer-id-1523' class='answer   answerof-516 ' value='1523'   \/><label for='answer-id-1523' id='answer-label-1523' class=' answer'><span>True<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-516[]' id='answer-id-1524' class='answer   answerof-516 ' value='1524'   \/><label for='answer-id-1524' id='answer-label-1524' class=' answer'><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-16' style=';'><div id='questionWrap-16'  class='   watupro-question-id-517'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>16. <\/span>\u03a3\u03b5 \u03ad\u03bd\u03b1 \u03c3\u03b7\u03bc\u03b5\u03af\u03bf \u0391 \u03b5\u03bd\u03cc\u03c2 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03bf\u03cd \u03c0\u03b5\u03b4\u03af\u03bf\u03c5 \u03c4\u03bf \u03b4\u03c5\u03bd\u03b1\u03bc\u03b9\u03ba\u03cc \u03b5\u03af\u03bd\u03b1\u03b9 -10<sup>4<\/sup>V. \u0393\u03b9\u03b1 \u03bd\u03b1 \u03bc\u03b5\u03c4\u03b1\u03c6\u03ad\u03c1\u03bf\u03c5\u03bc\u03b5 \u03ad\u03bd\u03b1 \u03c6\u03bf\u03c1\u03c4\u03af\u03bf 1\u03bcC \u03b1\u03c0\u03cc \u03c4\u03bf \u0391 \u03b5\u03ba\u03c4\u03cc\u03c2 \u03c0\u03b5\u03b4\u03af\u03bf\u03c5 \u03b1\u03c0\u03b1\u03b9\u03c4\u03b5\u03af\u03c4\u03b1\u03b9 \u03b5\u03bd\u03ad\u03c1\u03b3\u03b5\u03b9\u03b1 0,01J.<\/div><input type='hidden' name='question_id[]' id='qID_16' value='517' \/><input type='hidden' id='answerType517' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-517[]' id='answer-id-1525' class='answer   answerof-517 ' value='1525'   \/><label for='answer-id-1525' id='answer-label-1525' class=' answer'><span>True<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-517[]' id='answer-id-1526' class='answer   answerof-517 ' value='1526'   \/><label for='answer-id-1526' id='answer-label-1526' class=' answer'><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-17' style=';'><div id='questionWrap-17'  class='   watupro-question-id-518'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>17. <\/span>\u0394\u03cd\u03bf \u03bf\u03bc\u03cc\u03c3\u03b7\u03bc\u03b1 \u03c3\u03b7\u03bc\u03b5\u03b9\u03b1\u03ba\u03ac \u03c6\u03bf\u03c1\u03c4\u03af\u03b1 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03bf\u03cd\u03bd \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03cc \u03c0\u03b5\u03b4\u03af\u03bf. \u0394\u03b5\u03bd \u03c5\u03c0\u03ac\u03c1\u03c7\u03b5\u03b9 \u03c3\u03b7\u03bc\u03b5\u03af\u03bf \u03c4\u03bf\u03c5 \u03c0\u03b5\u03b4\u03af\u03bf \u03bc\u03b5 \u03b4\u03c5\u03bd\u03b1\u03bc\u03b9\u03ba\u03cc \u03bc\u03b7\u03b4\u03ad\u03bd.<\/div><input type='hidden' name='question_id[]' id='qID_17' value='518' \/><input type='hidden' id='answerType518' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-518[]' id='answer-id-1527' class='answer   answerof-518 ' value='1527'   \/><label for='answer-id-1527' id='answer-label-1527' class=' answer'><span>True<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-518[]' id='answer-id-1528' class='answer   answerof-518 ' value='1528'   \/><label for='answer-id-1528' id='answer-label-1528' class=' answer'><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-18' style=';'><div id='questionWrap-18'  class='   watupro-question-id-519'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>18. <\/span>\u03a3\u03c4\u03b1 \u03c3\u03b7\u03bc\u03b5\u03af\u03b1 \u0391 \u03ba\u03b1\u03b9 \u0392, \u03c0\u03bf\u03c5 \u03b1\u03c0\u03ad\u03c7\u03bf\u03c5\u03bd 4cm, \u03b2\u03c1\u03af\u03c3\u03ba\u03bf\u03bd\u03c4\u03b1\u03b9 \u03b4\u03cd\u03bf \u03c3\u03b7\u03bc\u03b5\u03b9\u03b1\u03ba\u03ac \u03c6\u03bf\u03c1\u03c4\u03af\u03b1 \u03ba\u03b1\u03b9 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03bf\u03cd\u03bd \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03cc \u03c0\u03b5\u03b4\u03af\u03bf. \u03a4\u03bf \u03c3\u03b7\u03bc\u03b5\u03af\u03b1 \u039b \u03b1\u03c0\u03ad\u03c7\u03b5\u03b9 \u03b1\u03c0\u03cc \u03c4\u03bf \u0391 1cm \u03ba\u03b1\u03b9 \u03c4\u03bf \u03b4\u03c5\u03bd\u03b1\u03bc\u03b9\u03ba\u03cc \u03b5\u03ba\u03b5\u03af \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc\u03b7\u03b4\u03ad\u03bd. \u0391\u03bd \u03c3\u03c4\u03bf \u0391 \u03c4\u03bf \u03c6\u03bf\u03c1\u03c4\u03af\u03bf \u03b5\u03af\u03bd\u03b1\u03b9 1\u03bcC, \u03c3\u03c4\u03bf \u0392 \u03b8\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 4\u03bcC.<br \/>\r\n<br \/>\r\n<div id=\"attachment_7395\" style=\"width: 356px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-7.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-7395\" class=\"wp-image-7395\" src=\"http:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-7-300x59.jpg\" alt=\"\" width=\"346\" height=\"68\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-7-300x59.jpg 300w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-7-768x152.jpg 768w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-7-1024x202.jpg 1024w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2019\/07\/Electric-Forces-7.jpg 1042w\" sizes=\"auto, (max-width: 346px) 100vw, 346px\" \/><\/a><p id=\"caption-attachment-7395\" class=\"wp-caption-text\">\u0395\u03c1\u03ce\u03c4\u03b7\u03c3\u03b7 18<\/p><\/div><\/div><input type='hidden' name='question_id[]' id='qID_18' value='519' \/><input type='hidden' id='answerType519' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-519[]' id='answer-id-1529' class='answer   answerof-519 ' value='1529'   \/><label for='answer-id-1529' id='answer-label-1529' class=' answer'><span>True<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-519[]' id='answer-id-1530' class='answer   answerof-519 ' value='1530'   \/><label for='answer-id-1530' id='answer-label-1530' class=' answer'><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-19' style=';'><div id='questionWrap-19'  class='   watupro-question-id-520'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>19. <\/span>\u0388\u03bd\u03b1 \u03b8\u03b5\u03c4\u03b9\u03ba\u03cc \u03b4\u03bf\u03ba\u03b9\u03bc\u03b1\u03c3\u03c4\u03b9\u03ba\u03cc \u03c6\u03bf\u03c1\u03c4\u03af\u03bf \u03bc\u03b5\u03c4\u03b1\u03c6\u03ad\u03c1\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03ad\u03bd\u03b1 \u03c3\u03b7\u03bc\u03b5\u03af\u03bf \u0391 \u03b4\u03c5\u03bd\u03b1\u03bc\u03b9\u03ba\u03bf\u03cd 30V \u03c3\u03b5 \u03ac\u03bb\u03bb\u03bf \u03c3\u03b7\u03bc\u03b5\u03af\u03bf \u0392 \u03b4\u03c5\u03bd\u03b1\u03bc\u03b9\u03ba\u03bf\u03cd 10V. \u039a\u03b1\u03c4\u03ac \u03c4\u03b7 \u03bc\u03b5\u03c4\u03b1\u03c6\u03bf\u03c1\u03ac \u03b1\u03c5\u03c4\u03ae \u03c0\u03b1\u03c1\u03ac\u03b3\u03b5\u03c4\u03b1\u03b9 \u03ad\u03c1\u03b3\u03bf \u03b1\u03c0\u03cc \u03c4\u03b7 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03c4\u03bf\u03c5 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03bf\u03cd \u03c0\u03b5\u03b4\u03af\u03bf\u03c5.<\/div><input type='hidden' name='question_id[]' id='qID_19' value='520' \/><input type='hidden' id='answerType520' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-520[]' id='answer-id-1531' class='answer   answerof-520 ' value='1531'   \/><label for='answer-id-1531' id='answer-label-1531' class=' answer'><span>True<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-520[]' id='answer-id-1532' class='answer   answerof-520 ' value='1532'   \/><label for='answer-id-1532' id='answer-label-1532' class=' answer'><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-20' style=';'><div id='questionWrap-20'  class='   watupro-question-id-521'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>20. <\/span>\u0391\u03c0\u03cc \u03c3\u03b7\u03bc\u03b5\u03af\u03bf \u0391, \u03c0\u03bf\u03c5 \u03b1\u03c0\u03ad\u03c7\u03b5\u03b9 \u03b1\u03c0\u03cc\u03c3\u03c4\u03b1\u03c3\u03b7 r \u03b1\u03c0\u03cc \u03b8\u03b5\u03c4\u03b9\u03ba\u03cc \u03c6\u03bf\u03c1\u03c4\u03af\u03bf-\u03c0\u03b7\u03b3\u03ae Q, \u03bc\u03b5\u03c4\u03b1\u03c6\u03ad\u03c1\u03b5\u03c4\u03b1\u03b9 \u03b8\u03b5\u03c4\u03b9\u03ba\u03cc \u03b4\u03bf\u03ba\u03b9\u03bc\u03b1\u03c3\u03c4\u03b9\u03ba\u03cc \u03c6\u03bf\u03c1\u03c4\u03af\u03bf q \u03c3\u03b5 \u03c3\u03b7\u03bc\u03b5\u03af\u03bf \u0392 \u03c0\u03bf\u03c5 \u03b1\u03c0\u03ad\u03c7\u03b5\u03b9 r\/2 \u03b1\u03c0\u03cc \u03c4\u03bf Q. \u039a\u03b1\u03c4\u03ac \u03c4\u03b7 \u03bc\u03b5\u03c4\u03b1\u03c6\u03bf\u03c1\u03ac \u03b1\u03c5\u03c4\u03ae \u03c4\u03bf \u03ad\u03c1\u03b3\u03bf \u03c4\u03b7\u03c2 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03c4\u03bf\u03c5 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03bf\u03cd \u03c0\u03b5\u03b4\u03af\u03bf\u03c5 \u03b5\u03af\u03bd\u03b1\u03b9 \u03ba\u03b1\u03c4\u03b1\u03bd\u03b1\u03bb\u03b9\u03c3\u03ba\u03cc\u03bc\u03b5\u03bd\u03bf.<\/div><input type='hidden' name='question_id[]' id='qID_20' value='521' \/><input type='hidden' id='answerType521' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-521[]' id='answer-id-1533' class='answer   answerof-521 ' value='1533'   \/><label for='answer-id-1533' id='answer-label-1533' class=' 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