{"id":8126,"date":"2020-12-12T16:29:31","date_gmt":"2020-12-12T14:29:31","guid":{"rendered":"http:\/\/viewonphysics.gr\/?p=8126"},"modified":"2021-01-24T12:28:45","modified_gmt":"2021-01-24T10:28:45","slug":"%ce%b7%ce%bb%ce%b5%ce%ba%cf%84%cf%81%ce%b9%ce%ba%cf%8c-%ce%ba%cf%8d%ce%ba%ce%bb%cf%89%ce%bc%ce%b1-%ce%b5%cf%81%ce%b3%ce%b1%cf%83%cf%84%ce%ae%cf%81%ce%b9%ce%bf","status":"publish","type":"post","link":"https:\/\/viewonphysics.gr\/?p=8126","title":{"rendered":"\u0397\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03cc \u039a\u03cd\u03ba\u03bb\u03c9\u03bc\u03b1 &#8211; \u0395\u03c1\u03b3\u03b1\u03c3\u03c4\u03ae\u03c1\u03b9\u03bf"},"content":{"rendered":"<p>\u039c\u03b5 \u03c4\u03bf \u03c0\u03b1\u03c1\u03b1\u03ba\u03ac\u03c4\u03c9 \u03b5\u03c1\u03b3\u03b1\u03c3\u03c4\u03ae\u03c1\u03b9\u03bf \u03b8\u03b1 \u03bc\u03ac\u03b8\u03b5\u03b9\u03c2 \u03bd\u03b1 \u03ba\u03b1\u03c4\u03b1\u03c3\u03ba\u03b5\u03c5\u03ac\u03b6\u03b5\u03b9\u03c2 \u03ba\u03bb\u03b5\u03b9\u03c3\u03c4\u03ac \u03ba\u03b1\u03b9 \u03b1\u03bd\u03bf\u03b9\u03c7\u03c4\u03ac \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03ac \u03ba\u03c5\u03ba\u03bb\u03ce\u03bc\u03b1\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03bd\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03b5\u03af\u03c2 \u03c3\u03c9\u03c3\u03c4\u03ac \u03c4\u03bf \u03b1\u03bc\u03c0\u03b5\u03c1\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf \u03ba\u03b1\u03b9 \u03c4\u03bf \u03b2\u03bf\u03bb\u03c4\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf. \u0391\u03ba\u03bf\u03bb\u03bf\u03cd\u03b8\u03b7\u03c3\u03b5 \u03c4\u03b1 \u03b2\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c0\u03bf\u03c5 \u03c0\u03c1\u03bf\u03c4\u03b5\u03af\u03bd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03ba\u03b1\u03b9 \u03b1\u03c0\u03ac\u03bd\u03c4\u03b7\u03c3\u03b5 \u03c3\u03c4\u03b9\u03c2 \u03b5\u03c1\u03c9\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2. \u038c\u03c4\u03b1\u03bd \u03c4\u03b5\u03bb\u03b5\u03b9\u03ce\u03c3\u03b5\u03b9\u03c2 \u03c0\u03ac\u03c4\u03b1 &#8220;\u0391\u03c0\u03bf\u03c4\u03b5\u03bb\u03ad\u03c3\u03bc\u03b1\u03c4\u03b1&#8221; \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b4\u03b5\u03b9\u03c2 \u03c4\u03b7\u03bd \u03b5\u03c0\u03af\u03b4\u03bf\u03c3\u03ae \u03c3\u03bf\u03c5 \u03ba\u03b1\u03b9 \u03c4\u03b9\u03c2 \u03c3\u03c9\u03c3\u03c4\u03ad\u03c2 \u03b1\u03c0\u03b1\u03bd\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2.<\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/phet.colorado.edu\/sims\/html\/circuit-construction-kit-dc-virtual-lab\/latest\/circuit-construction-kit-dc-virtual-lab_el.html\" scrolling=\"no\" allowfullscreen=\"allowfullscreen\" width=\"800\" height=\"600\"><\/iframe><\/p>\n\n<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=\"submittingExam57\" 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\n\n<form action=\"\" method=\"post\" class=\"quiz-form\" id=\"quiz-57\"  enctype=\"multipart\/form-data\" >\n<div class='watu-question ' id='question-1' style=';'><div id='questionWrap-1'  class='   watupro-question-id-682'>\n\t\t\t<div class='question-content'><p><span style=\"color: #0000ff;\"><strong><span style=\"font-size: 14pt;\">\u039a\u03b1\u03c4\u03b1\u03c3\u03ba\u03b5\u03c5\u03ae \u03ba\u03bb\u03b5\u03b9\u03c3\u03c4\u03bf\u03cd \u03ba\u03b1\u03b9 \u03b1\u03bd\u03bf\u03b9\u03c7\u03c4\u03bf\u03cd \u03ba\u03c5\u03ba\u03bb\u03ce\u03bc\u03b1\u03c4\u03bf\u03c2<\/span><\/strong><\/span><\/p>\n<p>&nbsp;<\/p>\n<p>\u0391\u03c0\u03cc \u03c4\u03b7\u03bd \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03b9\u03bf\u03b8\u03ae\u03ba\u03b7 \u03b1\u03c1\u03b9\u03c3\u03c4\u03b5\u03c1\u03ac \u03c3\u03cd\u03c1\u03b5 \u03b4\u03b9\u03b1\u03b4\u03bf\u03c7\u03b9\u03ba\u03ac \u03c4\u03b1 \u03b5\u03be\u03ae\u03c2 \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03b1:<\/p>\n<ol>\n<li>\u039c\u03c0\u03b1\u03c4\u03b1\u03c1\u03af\u03b1<\/li>\n<li>\u039b\u03ac\u03bc\u03c0\u03b1<\/li>\n<li>\u0394\u03b9\u03b1\u03ba\u03cc\u03c0\u03c4\u03b7<\/li>\n<li>\u03a4\u03c1\u03af\u03b1 \u03ba\u03b1\u03bb\u03ce\u03b4\u03b9\u03b1<\/li>\n<\/ol>\n<p>\u0394\u03b7\u03bc\u03b9\u03bf\u03cd\u03c1\u03b3\u03b7\u03c3\u03b5 \u03ba\u03cd\u03ba\u03bb\u03c9\u03bc\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ce\u03bd\u03c4\u03b1\u03c2 \u03cc\u03bb\u03b1 \u03c4\u03b1 \u03c0\u03b1\u03c1\u03b1\u03c0\u03ac\u03bd\u03c9 \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03b1.<\/p>\n<p>\u0391\u03c0\u03cc \u03c4\u03bf \u03ba\u03cd\u03ba\u03bb\u03c9\u03bc\u03b1 \u03c0\u03bf\u03c5 \u03b4\u03b7\u03bc\u03b9\u03bf\u03cd\u03c1\u03b3\u03b7\u03c3\u03b5\u03c2 <select name=\"gap_682_1\" class=\"watupro-gap answer answerof-682\" ><option value=\"\"><\/option><option value=\"\u03b4\u03b5\u03bd \u03c0\u03b5\u03c1\u03bd\u03ac\u03b5\u03b9\">\u03b4\u03b5\u03bd \u03c0\u03b5\u03c1\u03bd\u03ac\u03b5\u03b9<\/option><option value=\"\u03c0\u03b5\u03c1\u03bd\u03ac\u03b5\u03b9\">\u03c0\u03b5\u03c1\u03bd\u03ac\u03b5\u03b9<\/option><\/select> \u03c1\u03b5\u03cd\u03bc\u03b1. \u03a4\u03bf \u03ba\u03cd\u03ba\u03bb\u03c9\u03bc\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 <select name=\"gap_682_2\" class=\"watupro-gap answer answerof-682\" ><option value=\"\"><\/option><option value=\"\u03ba\u03bb\u03b5\u03b9\u03c3\u03c4\u03cc\">\u03ba\u03bb\u03b5\u03b9\u03c3\u03c4\u03cc<\/option><option value=\"\u03b1\u03bd\u03bf\u03b9\u03c7\u03c4\u03cc\">\u03b1\u03bd\u03bf\u03b9\u03c7\u03c4\u03cc<\/option><\/select>.<\/p>\n<p>&nbsp;<\/p>\n<input type='hidden' name='question_id[]' id='qID_1' value='682' \/><input type='hidden' id='answerType682' value='gaps'><!-- end question-content--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-2' style=';'><div id='questionWrap-2'  class='   watupro-question-id-684'>\n\t\t\t<div class='question-content'><p>\u039a\u03bb\u03b5\u03af\u03c3\u03b5 \u03c4\u03bf \u03b4\u03b9\u03b1\u03ba\u03cc\u03c0\u03c4\u03b7 \u03bc\u03b5 \u03ad\u03bd\u03b1 \u03ba\u03bb\u03b9\u03ba \u03c0\u03ac\u03bd\u03c9 \u03c4\u03bf\u03c5. \u0397 \u03bb\u03ac\u03bc\u03c0\u03b1 <select name=\"gap_684_1\" class=\"watupro-gap answer answerof-684\" ><option value=\"\"><\/option><option value=\"\u03c6\u03c9\u03c4\u03bf\u03b2\u03bf\u03bb\u03b5\u03af\">\u03c6\u03c9\u03c4\u03bf\u03b2\u03bf\u03bb\u03b5\u03af<\/option><option value=\"\u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03b2\u03b7\u03c3\u03c4\u03ae\">\u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03b2\u03b7\u03c3\u03c4\u03ae<\/option><\/select> \u03ba\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b1 \u03ba\u03b1\u03bb\u03ce\u03b4\u03b9\u03b1 <select name=\"gap_684_2\" class=\"watupro-gap answer answerof-684\" ><option value=\"\"><\/option><option value=\"\u03c0\u03b5\u03c1\u03bd\u03ac\u03b5\u03b9\">\u03c0\u03b5\u03c1\u03bd\u03ac\u03b5\u03b9<\/option><option value=\"\u03b4\u03b5\u03bd \u03c0\u03b5\u03c1\u03bd\u03ac\u03b5\u03b9\">\u03b4\u03b5\u03bd \u03c0\u03b5\u03c1\u03bd\u03ac\u03b5\u03b9<\/option><\/select> \u03c1\u03b5\u03cd\u03bc\u03b1. \u03a4\u03bf \u03ba\u03cd\u03ba\u03bb\u03c9\u03bc\u03b1 \u03c4\u03ce\u03c1\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 <select name=\"gap_684_3\" class=\"watupro-gap answer answerof-684\" ><option value=\"\"><\/option><option value=\"\u03b1\u03bd\u03bf\u03b9\u03c7\u03c4\u03cc\">\u03b1\u03bd\u03bf\u03b9\u03c7\u03c4\u03cc<\/option><option value=\"\u03ba\u03bb\u03b5\u03b9\u03c3\u03c4\u03cc\">\u03ba\u03bb\u03b5\u03b9\u03c3\u03c4\u03cc<\/option><\/select>.<\/p>\n<input type='hidden' name='question_id[]' id='qID_2' value='684' \/><input type='hidden' id='answerType684' value='gaps'><!-- end question-content--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-3' style=';'><div id='questionWrap-3'  class='   watupro-question-id-685'>\n\t\t\t<div class='question-content'><p>\u0391\u03c6\u03bf\u03cd \u03b4\u03b7\u03bc\u03b9\u03bf\u03cd\u03c1\u03b3\u03b7\u03c3\u03b5\u03c2 \u03ba\u03bb\u03b5\u03b9\u03c3\u03c4\u03cc \u03ba\u03cd\u03ba\u03bb\u03c9\u03bc\u03b1, \u03c0\u03b1\u03c1\u03b1\u03c4\u03ae\u03c1\u03b7\u03c3\u03b5 \u03c4\u03b7 \u03c6\u03bf\u03c1\u03ac \u03c4\u03b7\u03c2 \u03ba\u03af\u03bd\u03b7\u03c3\u03b7\u03c2 \u03c4\u03c9\u03bd \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03bf\u03bd\u03af\u03c9\u03bd \u03ba\u03b1\u03b9 \u03b2\u03c1\u03b5\u03c2 \u03c0\u03bf\u03b9\u03bf\u03c2 \u03c0\u03cc\u03bb\u03bf\u03c2 \u03c4\u03b7\u03c2 \u03bc\u03c0\u03b1\u03c4\u03b1\u03c1\u03af\u03b1\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c4\u03bf \u03bc\u03b1\u03cd\u03c1\u03bf \u03ac\u03ba\u03c1\u03bf \u03c4\u03b7\u03c2.<\/p>\n<p>\u03a3\u03c4\u03bf \u03bc\u03b1\u03cd\u03c1\u03bf \u03ac\u03ba\u03c1\u03bf \u03c4\u03b7\u03c2 \u03bc\u03c0\u03b1\u03c4\u03b1\u03c1\u03af\u03b1\u03c2 \u03b2\u03c1\u03af\u03c3\u03ba\u03b5\u03c4\u03b1\u03b9 \u03bf <select name=\"gap_685_1\" class=\"watupro-gap answer answerof-685\" ><option value=\"\"><\/option><option value=\"\u03b1\u03c1\u03bd\u03b7\u03c4\u03b9\u03ba\u03cc\u03c2\">\u03b1\u03c1\u03bd\u03b7\u03c4\u03b9\u03ba\u03cc\u03c2<\/option><option value=\"\u03b8\u03b5\u03c4\u03b9\u03ba\u03cc\u03c2\">\u03b8\u03b5\u03c4\u03b9\u03ba\u03cc\u03c2<\/option><\/select> \u03c0\u03cc\u03bb\u03bf\u03c2.<\/p>\n<input type='hidden' name='question_id[]' id='qID_3' value='685' \/><input type='hidden' id='answerType685' value='gaps'><!-- end question-content--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-4' style=';'><div id='questionWrap-4'  class='   watupro-question-id-686'>\n\t\t\t<div class='question-content'><p><span style=\"color: #0000ff;\"><strong><span style=\"font-size: 14pt;\">\u039c\u03ad\u03c4\u03c1\u03b7\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03ad\u03bd\u03c4\u03b1\u03c3\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03c2 \u03c4\u03ac\u03c3\u03b7\u03c2<\/span><\/strong><\/span><\/p>\n<p>&nbsp;<\/p>\n<p>\u0393\u03b9\u03b1 \u03c4\u03b7 \u03bc\u03ad\u03c4\u03c1\u03b7\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03ad\u03bd\u03c4\u03b1\u03c3\u03b7\u03c2 \u03c4\u03bf\u03c5 \u03c1\u03b5\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bc\u03b5 \u03c4\u03bf <select name=\"gap_686_1\" class=\"watupro-gap answer answerof-686\" ><option value=\"\"><\/option><option value=\"\u03b1\u03bc\u03c0\u03b5\u03c1\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf\">\u03b1\u03bc\u03c0\u03b5\u03c1\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf<\/option><option value=\"\u03b2\u03bf\u03bb\u03c4\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf\">\u03b2\u03bf\u03bb\u03c4\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf<\/option><\/select>, \u03b5\u03bd\u03ce \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03bc\u03ad\u03c4\u03c1\u03b7\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03c4\u03ac\u03c3\u03b7\u03c2 \u03c4\u03bf <select name=\"gap_686_2\" class=\"watupro-gap answer answerof-686\" ><option value=\"\"><\/option><option value=\"\u03b2\u03bf\u03bb\u03c4\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf\">\u03b2\u03bf\u03bb\u03c4\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf<\/option><option value=\"\u03b1\u03bc\u03c0\u03b5\u03c1\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf\">\u03b1\u03bc\u03c0\u03b5\u03c1\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf<\/option><\/select>.<\/p>\n<p>\u03a4\u03bf <select name=\"gap_686_3\" class=\"watupro-gap answer answerof-686\" ><option value=\"\"><\/option><option value=\"\u03b1\u03bc\u03c0\u03b5\u03c1\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf\">\u03b1\u03bc\u03c0\u03b5\u03c1\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf<\/option><option value=\"\u03b2\u03bf\u03bb\u03c4\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf\">\u03b2\u03bf\u03bb\u03c4\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf<\/option><\/select> \u03c4\u03bf \u03c3\u03c5\u03bd\u03b4\u03ad\u03bf\u03c5\u03bc\u03b5 \u03c3\u03b5 \u03c3\u03b5\u03b9\u03c1\u03ac \u03c3\u03c4\u03bf \u03ba\u03cd\u03ba\u03bb\u03c9\u03bc\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03bf <select name=\"gap_686_4\" class=\"watupro-gap answer answerof-686\" ><option value=\"\"><\/option><option value=\"\u03b1\u03bc\u03c0\u03b5\u03c1\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf\">\u03b1\u03bc\u03c0\u03b5\u03c1\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf<\/option><option value=\"\u03b2\u03bf\u03bb\u03c4\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf\">\u03b2\u03bf\u03bb\u03c4\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf<\/option><\/select> \u03c0\u03b1\u03c1\u03ac\u03bb\u03bb\u03b7\u03bb\u03b1.<\/p>\n<input type='hidden' name='question_id[]' id='qID_4' value='686' \/><input type='hidden' id='answerType686' value='gaps'><!-- end question-content--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-5' style=';'><div id='questionWrap-5'  class='   watupro-question-id-687'>\n\t\t\t<div class='question-content'><div>\u039c\u03b5 \u03ba\u03bb\u03b9\u03ba \u03c3\u03c4\u03bf \u03b4\u03b9\u03b1\u03ba\u03cc\u03c0\u03c4\u03b7 \u03b4\u03b7\u03bc\u03b9\u03bf\u03cd\u03c1\u03b3\u03b7\u03c3\u03b5 \u03b1\u03bd\u03bf\u03b9\u03c7\u03c4\u03cc \u03ba\u03cd\u03ba\u03bb\u03c9\u03bc\u03b1. \u03a3\u03cd\u03c1\u03b5 \u03c4\u03bf \u03b1\u03bc\u03c0\u03b5\u03c1\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf \u03b1\u03c0\u03cc \u03c4\u03b7 \u03b4\u03b5\u03be\u03b9\u03ac \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03b9\u03bf\u03b8\u03ae\u03ba\u03b7, \u03b2\u03ac\u03bb\u03c4\u03bf \u03c3\u03c4\u03bf \u03ba\u03cd\u03ba\u03bb\u03c9\u03bc\u03b1, \u03ba\u03bb\u03b5\u03af\u03c3\u03b5 \u03c4\u03bf \u03b4\u03b9\u03b1\u03ba\u03cc\u03c0\u03c4\u03b7 \u03ba\u03b1\u03b9 \u03bc\u03ad\u03c4\u03c1\u03b7\u03c3\u03b5 \u03c4\u03b7\u03bd \u03ad\u03bd\u03c4\u03b1\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c1\u03b5\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2.<br \/>\r\n<br \/>\r\n\u0397 \u03ad\u03bd\u03c4\u03b1\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c1\u03b5\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9:<\/div><input type='hidden' name='question_id[]' id='qID_5' value='687' \/><input type='hidden' id='answerType687' 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-687[]' id='answer-id-1951' class='answer   answerof-687 ' value='1951'   \/><label for='answer-id-1951' id='answer-label-1951' class=' answer'><span>0.2\u0391<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-687[]' id='answer-id-1952' class='answer   answerof-687 ' value='1952'   \/><label for='answer-id-1952' id='answer-label-1952' class=' answer'><span>0,5\u0391<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-687[]' id='answer-id-1953' class='answer   answerof-687 ' value='1953'   \/><label for='answer-id-1953' id='answer-label-1953' class=' answer'><span>0,9\u0391<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-687[]' id='answer-id-1954' class='answer   answerof-687 ' value='1954'   \/><label for='answer-id-1954' id='answer-label-1954' class=' answer'><span>0,9V<\/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-688'>\n\t\t\t<div class='question-content'><div>\u03a3\u03cd\u03c1\u03b5 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03b9\u03bf\u03b8\u03ae\u03ba\u03b7 \u03c4\u03bf \u03b2\u03bf\u03bb\u03c4\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf \u03ba\u03b1\u03b9 \u03b1\u03ba\u03bf\u03cd\u03bc\u03c0\u03b7\u03c3\u03b5 \u03c4\u03bf\u03c5\u03c2 \u03b4\u03cd\u03bf \u03b1\u03ba\u03c1\u03bf\u03b4\u03ad\u03ba\u03c4\u03b5\u03c2 \u03c4\u03bf\u03c5 \u03c3\u03c4\u03b1 \u03ac\u03ba\u03c1\u03b1 \u03c4\u03b7\u03c2 \u03bb\u03ac\u03bc\u03c0\u03b1\u03c2.<br \/>\r\n<br \/>\r\n\u0397 \u03c4\u03ac\u03c3\u03b7 \u03c0\u03bf\u03c5 \u03c0\u03b1\u03af\u03c1\u03bd\u03b5\u03b9\u03c2, \u03cc\u03c4\u03b1\u03bd \u03c4\u03bf \u03ba\u03cd\u03ba\u03bb\u03c9\u03bc\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03ba\u03bb\u03b5\u03b9\u03c3\u03c4\u03cc, \u03b5\u03af\u03bd\u03b1\u03b9:<\/div><input type='hidden' name='question_id[]' id='qID_6' value='688' \/><input type='hidden' id='answerType688' 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-688[]' id='answer-id-1955' class='answer   answerof-688 ' value='1955'   \/><label for='answer-id-1955' id='answer-label-1955' class=' answer'><span>0V<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-688[]' id='answer-id-1956' class='answer   answerof-688 ' value='1956'   \/><label for='answer-id-1956' id='answer-label-1956' class=' answer'><span>9V<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-688[]' id='answer-id-1957' class='answer   answerof-688 ' value='1957'   \/><label for='answer-id-1957' id='answer-label-1957' class=' answer'><span>9A<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-688[]' id='answer-id-1958' class='answer   answerof-688 ' value='1958'   \/><label for='answer-id-1958' id='answer-label-1958' class=' answer'><span>90V<\/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-689'>\n\t\t\t<div class='question-content'><div>\u0386\u03bd\u03bf\u03b9\u03be\u03b5 \u03c4\u03bf \u03b4\u03b9\u03b1\u03ba\u03cc\u03c0\u03c4\u03b7 (\u03bc\u03b5 \u03ba\u03bb\u03b9\u03ba) \u03ba\u03b1\u03b9 \u03bc\u03ad\u03c4\u03c1\u03b1 \u03c4\u03ce\u03c1\u03b1 \u03c4\u03b7\u03bd \u03c4\u03ac\u03c3\u03b7.<br \/>\r\n<br \/>\r\n\u0397 \u03c4\u03ac\u03c3\u03b7 \u03c3\u03c4\u03b1 \u03ac\u03ba\u03c1\u03b1 \u03c4\u03b7\u03c2 \u03bb\u03ac\u03bc\u03c0\u03b1\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9:<\/div><input type='hidden' name='question_id[]' id='qID_7' value='689' \/><input type='hidden' id='answerType689' 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-689[]' id='answer-id-1959' class='answer   answerof-689 ' value='1959'   \/><label for='answer-id-1959' id='answer-label-1959' class=' answer'><span>0V<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-689[]' id='answer-id-1960' class='answer   answerof-689 ' value='1960'   \/><label for='answer-id-1960' id='answer-label-1960' class=' answer'><span>0,9V<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-689[]' id='answer-id-1961' class='answer   answerof-689 ' value='1961'   \/><label for='answer-id-1961' id='answer-label-1961' class=' answer'><span>9V<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-689[]' id='answer-id-1962' class='answer   answerof-689 ' value='1962'   \/><label for='answer-id-1962' id='answer-label-1962' class=' answer'><span>90V<\/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-690'>\n\t\t\t<div class='question-content'><div>\u039a\u03bb\u03b5\u03af\u03c3\u03b5 \u03c4\u03bf \u03b4\u03b9\u03b1\u03ba\u03cc\u03c0\u03c4\u03b7 \u03ba\u03b1\u03b9 \u03b2\u03ac\u03bb\u03b5 \u03c4\u03bf\u03c5\u03c2 \u03b1\u03ba\u03c1\u03bf\u03b4\u03ad\u03ba\u03c4\u03b5\u03c2 \u03c4\u03bf\u03c5 \u03b2\u03bf\u03bb\u03c4\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf\u03c5 \u03c3\u03c4\u03bf\u03c5\u03c2 \u03c0\u03cc\u03bb\u03bf\u03c5\u03c2 \u03c4\u03b7\u03c2 \u03c0\u03b7\u03b3\u03ae\u03c2.<br \/>\r\n<br \/>\r\n\u0397 \u03c4\u03ac\u03c3\u03b7 \u03c0\u03bf\u03c5 \u03c0\u03b1\u03af\u03c1\u03bd\u03b5\u03b9\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9:<\/div><input type='hidden' name='question_id[]' id='qID_8' value='690' \/><input type='hidden' id='answerType690' 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-690[]' id='answer-id-1963' class='answer   answerof-690 ' value='1963'   \/><label for='answer-id-1963' id='answer-label-1963' class=' answer'><span>0V<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-690[]' id='answer-id-1964' class='answer   answerof-690 ' value='1964'   \/><label for='answer-id-1964' id='answer-label-1964' class=' answer'><span>0,9V<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-690[]' id='answer-id-1965' class='answer   answerof-690 ' value='1965'   \/><label for='answer-id-1965' id='answer-label-1965' class=' answer'><span>9A<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-690[]' id='answer-id-1966' class='answer   answerof-690 ' value='1966'   \/><label for='answer-id-1966' id='answer-label-1966' class=' answer'><span>9V<\/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-691'>\n\t\t\t<div class='question-content'><div>\u0386\u03bd\u03bf\u03b9\u03be\u03b5 \u03c4\u03bf \u03b4\u03b9\u03b1\u03ba\u03cc\u03c0\u03c4\u03b7 \u03ba\u03b1\u03b9 \u03bc\u03ad\u03c4\u03c1\u03b7\u03c3\u03b5 \u03c0\u03ac\u03bb\u03b9 \u03c4\u03b7\u03bd \u03c4\u03ac\u03c3\u03b7 \u03c3\u03c4\u03b1 \u03ac\u03ba\u03c1\u03b1 \u03c4\u03b7\u03c2 \u03bc\u03c0\u03b1\u03c4\u03b1\u03c1\u03af\u03b1\u03c2.<br \/>\r\n<br \/>\r\n\u0397 \u03c4\u03ac\u03c3\u03b7 \u03b5\u03af\u03bd\u03b1\u03b9:<\/div><input type='hidden' name='question_id[]' id='qID_9' value='691' \/><input type='hidden' id='answerType691' 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-691[]' id='answer-id-1967' class='answer   answerof-691 ' value='1967'   \/><label for='answer-id-1967' id='answer-label-1967' class=' answer'><span>0V<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-691[]' id='answer-id-1968' class='answer   answerof-691 ' value='1968'   \/><label for='answer-id-1968' id='answer-label-1968' class=' answer'><span>0,9V<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-691[]' id='answer-id-1969' class='answer   answerof-691 ' value='1969'   \/><label for='answer-id-1969' id='answer-label-1969' class=' answer'><span>9A<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-691[]' id='answer-id-1970' class='answer   answerof-691 ' value='1970'   \/><label for='answer-id-1970' id='answer-label-1970' class=' answer'><span>9V<\/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-692'>\n\t\t\t<div class='question-content'><p>\u0391\u03c0\u03cc \u03c4\u03b9\u03c2 \u03bc\u03b5\u03c4\u03c1\u03ae\u03c3\u03b5\u03b9\u03c2 \u03bc\u03b5 \u03c4\u03bf \u03b2\u03bf\u03bb\u03c4\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf \u03b2\u03b3\u03b1\u03af\u03bd\u03b5\u03b9 \u03c4\u03bf \u03c3\u03c5\u03bc\u03c0\u03ad\u03c1\u03b1\u03c3\u03bc\u03b1:<\/p>\n<p>\u038c\u03c4\u03b1\u03bd \u03c4\u03bf \u03ba\u03cd\u03ba\u03bb\u03c9\u03bc\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03ba\u03bb\u03b5\u03b9\u03c3\u03c4\u03cc, \u03c4\u03cc\u03c4\u03b5 \u03c4\u03bf \u03b2\u03bf\u03bb\u03c4\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf \u03b4\u03af\u03bd\u03b5\u03b9 <select name=\"gap_692_1\" class=\"watupro-gap answer answerof-692\" ><option value=\"\"><\/option><option value=\"\u03bc\u03b7 \u03bc\u03b7\u03b4\u03b5\u03bd\u03b9\u03ba\u03ad\u03c2\">\u03bc\u03b7 \u03bc\u03b7\u03b4\u03b5\u03bd\u03b9\u03ba\u03ad\u03c2<\/option><option value=\"\u03bc\u03b7\u03b4\u03b5\u03bd\u03b9\u03ba\u03ad\u03c2\">\u03bc\u03b7\u03b4\u03b5\u03bd\u03b9\u03ba\u03ad\u03c2<\/option><\/select> \u03c4\u03b9\u03bc\u03ad\u03c2 \u03ba\u03b1\u03b9 \u03c3\u03c4\u03b1 \u03ac\u03ba\u03c1\u03b1 \u03c4\u03bf\u03c5 \u03ba\u03b1\u03c4\u03b1\u03bd\u03b1\u03bb\u03c9\u03c4\u03ae \u03ba\u03b1\u03b9 \u03c3\u03c4\u03bf\u03c5\u03c2 \u03c0\u03cc\u03bb\u03bf\u03c5\u03c2 \u03c4\u03b7\u03c2 \u03c0\u03b7\u03b3\u03ae\u03c2.<\/p>\n<p>\u038c\u03c4\u03b1\u03bd \u03c4\u03bf \u03ba\u03cd\u03ba\u03bb\u03c9\u03bc\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03bd\u03bf\u03b9\u03c7\u03c4\u03cc, \u03b7 \u03c4\u03ac\u03c3\u03b7 <select name=\"gap_692_2\" class=\"watupro-gap answer answerof-692\" ><option value=\"\"><\/option><option value=\"\u03c3\u03c4\u03b1 \u03ac\u03ba\u03c1\u03b1 \u03ba\u03b1\u03c4\u03b1\u03bd\u03b1\u03bb\u03c9\u03c4\u03ae\">\u03c3\u03c4\u03b1 \u03ac\u03ba\u03c1\u03b1 \u03ba\u03b1\u03c4\u03b1\u03bd\u03b1\u03bb\u03c9\u03c4\u03ae<\/option><option value=\"\u03c3\u03c4\u03bf\u03c5\u03c2 \u03c0\u03cc\u03bb\u03bf\u03c5\u03c2 \u03c4\u03b7\u03c2 \u03c0\u03b7\u03b3\u03ae\u03c2\">\u03c3\u03c4\u03bf\u03c5\u03c2 \u03c0\u03cc\u03bb\u03bf\u03c5\u03c2 \u03c4\u03b7\u03c2 \u03c0\u03b7\u03b3\u03ae\u03c2<\/option><\/select> \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc\u03b7\u03b4\u03ad\u03bd, \u03b5\u03bd\u03ce \u03b7 \u03c4\u03ac\u03c3\u03b7 <select name=\"gap_692_3\" class=\"watupro-gap answer answerof-692\" ><option value=\"\"><\/option><option value=\"\u03c3\u03c4\u03b1 \u03ac\u03ba\u03c1\u03b1 \u03ba\u03b1\u03c4\u03b1\u03bd\u03b1\u03bb\u03c9\u03c4\u03ae\">\u03c3\u03c4\u03b1 \u03ac\u03ba\u03c1\u03b1 \u03ba\u03b1\u03c4\u03b1\u03bd\u03b1\u03bb\u03c9\u03c4\u03ae<\/option><option value=\"\u03c3\u03c4\u03bf\u03c5\u03c2 \u03c0\u03cc\u03bb\u03bf\u03c5\u03c2 \u03c4\u03b7\u03c2 \u03c0\u03b7\u03b3\u03ae\u03c2\">\u03c3\u03c4\u03bf\u03c5\u03c2 \u03c0\u03cc\u03bb\u03bf\u03c5\u03c2 \u03c4\u03b7\u03c2 \u03c0\u03b7\u03b3\u03ae\u03c2<\/option><\/select> \u03b4\u03b5\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc\u03b7\u03b4\u03ad\u03bd.<\/p>\n<input type='hidden' name='question_id[]' id='qID_10' value='692' \/><input type='hidden' id='answerType692' value='gaps'><!-- end question-content--><\/div><!-- end questionWrap--><\/div><\/div><div style='display:none' id='question-11'>\n\t<div class='question-content'>\n\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\" alt=\"Loading...\" title=\"Loading...\" \/>&nbsp;Loading...\t<\/div>\n<\/div>\n\n<br \/>\n\t\n\t\t\t<div class=\"watupro_buttons flex \" id=\"watuPROButtons57\">\n\t\t  <div id=\"prev-question\" style=\"display:none;\"><input type=\"button\" value=\"&lt; 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