{"id":64838,"date":"2026-06-26T04:26:40","date_gmt":"2026-06-25T19:26:40","guid":{"rendered":"https:\/\/phys-edu.net\/wp\/?p=64838"},"modified":"2026-06-26T04:26:40","modified_gmt":"2026-06-25T19:26:40","slug":"caught-in-the-lab-does-current-actually-hesitate-a-coils-0-0005-second-story","status":"publish","type":"post","link":"https:\/\/phys-edu.net\/wp\/?p=64838&lang=en","title":{"rendered":"Caught in the Lab: Does Current Actually Hesitate? A Coil&#8217;s 0.0005-Second Story"},"content":{"rendered":"<p style=\"text-align: center;\"><span style=\"color: #339966;\"><strong>I&#8217;m Ken Kuwako, the Science Trainer. Every day is an experiment.<\/strong><\/span><\/p>\n<p>The moment you flip a switch, electric current starts flowing through the circuit instantly\u2026 or does it? It turns out the story isn\u2019t quite that simple. Add just a single coil to the circuit, and the current no longer rushes forward obediently. Instead, it creeps up gradually, almost as if someone has applied the brakes. In this experiment, I used an EasySense sensor from Data Harvest (purchased through Narika) to capture this fascinating phenomenon known as self-induction in real time.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-37308 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/12\/IMG_4396.jpg\" alt=\"\" width=\"488\" height=\"366\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/12\/IMG_4396.jpg 800w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/12\/IMG_4396-300x225.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/12\/IMG_4396-768x576.jpg 768w\" sizes=\"auto, (max-width: 488px) 100vw, 488px\" \/><\/p>\n<p>First, take a look at this video.<\/p>\n<p><iframe loading=\"lazy\" title=\"\u30bb\u30f3\u30b5\u30fc\u3067\u898b\u308b\u81ea\u5df1\u8a98\u5c0e\u306e\u5b9f\u9a13\u3010EasySense DataHarvest\u3011\" width=\"1140\" height=\"641\" src=\"https:\/\/www.youtube.com\/embed\/28xLrtacdMw?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<h3>What Is Self-Induction? The Coil\u2019s Reluctance to Change<\/h3>\n<p>When current tries to flow through a coil, the coil responds by generating an induced voltage that opposes the change in current. This phenomenon is called self-induction. Much like electrical oscillations discussed in a previous article, self-induction happens incredibly quickly\u2014far too fast for the human eye or an ordinary ammeter to follow. That\u2019s where a high-speed data sensor becomes essential.<\/p>\n<h3>Catching an Event That Lasts Just 0.0005 Seconds: EasySense Setup<\/h3>\n<p>For this experiment, the EasySense sensor was configured with a measurement duration of 200 milliseconds and a sampling rate of 2,000 measurements per second. In other words, it collected data 2,000 times every second.<\/p>\n<p>With such fine time resolution, even the fleeting rise of electric current\u2014something that appears instantaneous to us\u2014can be reconstructed as a smooth curve on a graph.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-36879 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/12\/382fbd03e816e50b0d791dee4d7745f8.jpg\" alt=\"\" width=\"336\" height=\"284\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/12\/382fbd03e816e50b0d791dee4d7745f8.jpg 724w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/12\/382fbd03e816e50b0d791dee4d7745f8-300x254.jpg 300w\" sizes=\"auto, (max-width: 336px) 100vw, 336px\" \/><\/p>\n<h3>Not Just a Voltmeter: An Ammeter Can Reveal Self-Induction Too<\/h3>\n<p>The video above demonstrated the effect using a voltmeter, but self-induction can also be observed with an ammeter. In this experiment, I used a current sensor capable of measuring between -1 A and +1 A.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-37307 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/12\/IMG_4397.jpg\" alt=\"\" width=\"462\" height=\"347\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/12\/IMG_4397.jpg 800w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/12\/IMG_4397-300x225.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/12\/IMG_4397-768x576.jpg 768w\" sizes=\"auto, (max-width: 462px) 100vw, 462px\" \/><\/p>\n<p>There\u2019s one important point to remember when using an ammeter: it must be connected in <b>series<\/b> with the circuit.<\/p>\n<p>Voltmeters go in parallel; ammeters go in series. It\u2019s one of the first rules students learn in middle school science, yet it\u2019s surprisingly easy to second-guess yourself during an experiment and wonder, \u201cWait&#8230; which one was it again?\u201d<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-37308 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/12\/IMG_4396.jpg\" alt=\"\" width=\"488\" height=\"366\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/12\/IMG_4396.jpg 800w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/12\/IMG_4396-300x225.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/12\/IMG_4396-768x576.jpg 768w\" sizes=\"auto, (max-width: 488px) 100vw, 488px\" \/><\/p>\n<h3>The Data Reveals How a Coil Holds Current Back<\/h3>\n<p>Now for the results.<\/p>\n<p>In the graph below, the blue curve represents the circuit without a coil, while the red curve shows the circuit with a coil. Without a coil, the current reaches its maximum value almost immediately when the switch is turned on.<\/p>\n<p>With a coil in the circuit, however, the current doesn\u2019t jump straight to its maximum. Instead, it rises gradually over time, creating a clear and measurable curve.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-37306 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/12\/IMG_4399.jpg\" alt=\"\" width=\"800\" height=\"369\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/12\/IMG_4399.jpg 800w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/12\/IMG_4399-300x138.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/12\/IMG_4399-768x354.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>In real time, this entire event lasts only a fraction of a second. Yet seeing it appear as a beautiful curve on a graph was genuinely exciting. A phenomenon that normally exists only as an equation or textbook explanation suddenly becomes visible evidence right in front of your eyes. No matter how many times I experience it, that moment never loses its thrill.<\/p>\n<h3>Why Does a Coil Make Current Hesitate?<\/h3>\n<p>The answer lies in <b>Lenz\u2019s Law<\/b>.<\/p>\n<p>Whenever the current through a coil changes, the coil generates a voltage that opposes that change. In a sense, it behaves as though it has electrical inertia\u2014a tendency to resist sudden changes, much like objects do in mechanics.<\/p>\n<p>This property isn\u2019t confined to laboratory experiments. Transformers, electric motors, induction cooktops, and even the wireless charging systems in smartphones all rely on self-induction and electromagnetic induction. These principles quietly power countless technologies that support modern life.<\/p>\n<p>By understanding the tiny \u201chesitation\u201d of a simple coil, we gain a deeper appreciation for electricity\u2014an invisible force that becomes a little less mysterious and a lot more fascinating.<\/p>\n<h3>Contact and Collaboration<\/h3>\n<p>Bringing the wonder of science closer to everyday life! This site is packed with fun science experiments you can try at home, along with practical tips and easy-to-understand explanations. Feel free to explore and discover something new!<\/p>\n<p>\u30fbThe contents of Science Notebook have been published as a book. Learn more <a href=\"https:\/\/amzn.to\/42PMCEL\">here<\/a>.<br \/>\n\u30fbRead more about Ken Kuwako, the creator of this site, <a href=\"https:\/\/phys-edu.net\/wp\/?page_id=37\">here<\/a>.<br \/>\n\u30fbFor writing, lectures, science workshops, TV supervision, appearances, and other collaborations, click <a href=\"https:\/\/phys-edu.net\/wp\/?page_id=188\">here<\/a>.<br \/>\n<span class=\"s2\">\u30fbGet updates on new articles by following <a href=\"https:\/\/x.com\/kuwako\">X<\/a>!<\/span><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.youtube.com\/user\/kkuwako\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-35048\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/03\/3d9640dad7bc5538e76f92da1966ee19.jpg\" alt=\"\" width=\"30\" height=\"21\" \/><\/a><a href=\"https:\/\/www.youtube.com\/user\/kkuwako?sub_confirmation=1\">Science Notes Channel<\/a> features videos of exciting science experiments!<\/p>\n<h3>\uff16\u6708\u306e\u30a4\u30c1\u30aa\u30b7\u5b9f\u9a13\uff01<\/h3>\r\n<p style=\"text-align: center;\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=64043\">\u30ec\u30e2\u30f3\u3084\u30aa\u30ec\u30f3\u30b8\u3067\u98a8\u8239\u3092\u5272\u308d\u3046\uff01\u30a4\u30f3\u30d1\u30af\u30c8\u304c\u629c\u7fa4\u306e\u30ea\u30e2\u30cd\u30f3\u98a8\u8239\u306e\u5b9f\u9a13<\/a><\/p>\r\n<p style=\"text-align: center;\"><img class=\"alignnone  wp-image-64045\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-06-01-4.45.24.jpeg\" alt=\"\" width=\"406\" height=\"349\" \/><\/p>\r\n\r\n<h3 style=\"text-align: left;\"><span style=\"font-size: medium;\"><b><strong>\u30c6\u30ec\u30d3\u756a\u7d44\u76e3\u4fee\u30fb\u30a4\u30d9\u30f3\u30c8\u7b49\u306e\u304a\u77e5\u3089\u305b<\/strong><\/b><\/span><\/h3>\r\n<ul>\r\n \t<li>6\u670826\u65e5\uff08\u91d1\uff09\u3000<a href=\"https:\/\/phys-edu.net\/wp\/?p=63067\">\u516c\u958b\u7814\u7a76\u4f1a\u300c\u8131\u4f5c\u696d\u5316\uff01\u30c7\u30b8\u30bf\u30eb\u5316\u3068\u6bb5\u968e\u7684\u6307\u5c0e\u3067\u5b9f\u73fe\u3059\u308b \u30aa\u30fc\u30e0\u306e\u6cd5\u5247\u306e\u63a2\u7a76\u300d<\/a><\/li>\r\n \t<li>\uff16\u670828\u65e5\uff08\u65e5\uff09\u3000<a href=\"https:\/\/phys-edu.net\/wp\/?p=64337\">\u30c0\u30d3\u30f3\u30c1\u30de\u30b9\u30bf\u30fc\u30ba\uff20\u662d\u548c\u5973\u5b50<\/a><\/li>\r\n \t<li>6\u670830\u65e5\uff08\u706b\uff09\u3000<a href=\"https:\/\/phys-edu.net\/wp\/?p=64801\">6\/30\u300023:56\u301c\u3000\u3010\u79d1\u5b66\u76e3\u4fee\u30fb\u51fa\u6f14\u3011\u300c\u5730\u7403\u307e\u308b\u3054\u3068\u5927\u5b9f\u9a13\u30cd\u30a4\u30c1\u30e3\u30fc\u30c6\u30a3\u30fc\u30c1\u30e3\u30fc\u300d\uff08TBS\uff09<\/a><\/li>\r\n \t<li>7\u670818\u65e5\uff08\u571f\uff09\u3000<a href=\"https:\/\/phys-edu.net\/wp\/?p=60018\">\u6559\u54e1\u5411\u3051\u5b9f\u9a13\u8b1b\u7fd2\u4f1a\u300c\u30ca\u30ea\u30ab\u30ab\u30b5\u30a4\u30a8\u30f3\u30b9\u30a2\u30ab\u30c7\u30df\u30fc\u300d\u306e\u8b1b\u5e2b\u3092\u3057\u307e\u3059<\/a>\u3002\u304a\u4f1a\u3044\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\r\n \t<li>12\u670826\u65e5\uff08\u571f\uff09\u3000<a href=\"https:\/\/phys-edu.net\/wp\/?p=64825\">\u30ca\u30ea\u30ab\u30b5\u30a4\u30a8\u30f3\u30b9\u30a2\u30ab\u30c7\u30df\u30fc\uff08\u6559\u54e1\u5411\u3051\u5b9f\u9a13\u8b1b\u7fd2\u4f1a\uff09\u958b\u50ac<\/a><\/li>\r\n<\/ul>\r\n<h3><b>\u66f8\u7c4d<strong>\u306e\u304a\u77e5\u3089\u305b<\/strong><\/b><\/h3>\r\n<ul>\r\n \t<li>\uff17\u670816\u65e5\u767a\u58f2\u3000\u300e<a href=\"https:\/\/amzn.to\/4vmkUfb\">\u9ad8\u6821\u5165\u8a66 \u5206\u89e3\u554f\u984c\u96c6 \u7406\u79d1<\/a>\u300f\uff08\u5b66\u7814\uff09\u2026\u96e3\u3057\u3044\u554f\u984c\u3082\u5c0f\u3055\u306a\u554f\u984c\u306b\u5206\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u554f\u984c\u3092\u89e3\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305d\u3093\u306a\u5206\u89e3\u306e\u6280\u8853\u304c\u8eab\u306b\u3064\u304f\u3088\u3046\u306b\u6df1\u304f\u95a2\u308f\u308a\u3092\u6301\u3063\u3066\u4f5c\u308a\u307e\u3057\u305f\u3002\r\n<img class=\"alignnone  wp-image-64694 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-06-20-18.25.27.jpeg\" alt=\"\" width=\"197\" height=\"275\" \/><\/li>\r\n \t<li>\u300e\u5927\u4eba\u306e\u305f\u3081\u306e\u9ad8\u6821\u7269\u7406\u5fa9\u7fd2\u5e33\u300f\uff08\u8b1b\u8ac7\u793e\uff09\u2026\u4e00\u822c\u5411\u3051\u306b\u65e5\u5e38\u306e\u7269\u7406\u306b\u3064\u3044\u3066\u516c\u5f0f\u3092\u5143\u306b\u7d10\u89e3\u304d\u307e\u3057\u305f\u3002<a href=\"https:\/\/phys-edu.net\/wp\/?p=1827\">\u7279\u8a2d\u30b5\u30a4\u30c8<\/a>\u3067\u306f\u5b9f\u9a13\u3092\u591a\u6570\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002<strong>\u203b\u5897\u5237\u304c\u304b\u304b\u308a\uff16\u5237\u3068\u306a\u308a\u307e\u3057\u305f\uff082026\/02\/01\uff09\r\n<img class=\"alignnone wp-image-10940 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0-300x262.jpg\" sizes=\"(max-width: 220px) 100vw, 220px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0-300x262.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0.jpg 311w\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2014-07-05 0.43.51\" width=\"220\" height=\"192\" \/>\r\n<\/strong><\/li>\r\n \t<li>\u300e\u304d\u3081\u308b!\u5171\u901a\u30c6\u30b9\u30c8 \u7269\u7406\u57fa\u790e \u6539\u8a02\u7248\u300f\uff08\u5b66\u7814\uff09\u2026\u3000\u9ad8\u6821\u7269\u7406\u306e\u53c2\u8003\u66f8\u3067\u3059\u3002\u30a4\u30e9\u30b9\u30c8\u3092\u591a\u304f\u3057\u3066\u30a4\u30e1\u30fc\u30b8\u304c\u6301\u3066\u308b\u3088\u3046\u306b\u63cf\u304d\u307e\u3057\u305f\u3002\u6388\u696d\u306b\u3064\u3044\u3066\u3044\u3051\u306a\u3044\u3001\u7269\u7406\u304c\u82e6\u624b\u3001\u305d\u3093\u306a\u751f\u5f92\u306b\u304a\u3059\u3059\u3081\u3067\u3059\u3002<a href=\"https:\/\/phys-edu.net\/wp\/?p=45322\">\u7279\u8a2d\u30b5\u30a4\u30c8<\/a>\u306f\u3053\u3061\u3089\u3002\r\n<img class=\"alignnone wp-image-45718 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c.jpg\" sizes=\"(max-width: 184px) 100vw, 184px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c.jpg 756w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c-300x269.jpg 300w\" alt=\"\" width=\"184\" height=\"165\" \/><\/li>\r\n<\/ul>\r\n<h3><span style=\"text-align: center;\">\u5404\u7a2eSNS\uff08\u66f4\u65b0\u60c5\u5831\u3092\u304a\u5c4a\u3051\uff01\uff09<\/span><\/h3>\r\n<p style=\"text-align: center;\">\u3010\u65e5\u672c\u8a9e\u3011<a style=\"text-align: center;\" href=\"https:\/\/twitter.com\/kuwako\">X(Twitter)<\/a><span style=\"text-align: center;\">\uff0f<\/span><a style=\"text-align: center;\" href=\"https:\/\/www.instagram.com\/science_seeds\/\">instagram<\/a><span style=\"text-align: center;\">\uff0f<\/span><a style=\"text-align: center;\" href=\"https:\/\/www.facebook.com\/kuwakolab\/\">Facebook<\/a>\u3000\u3010\u82f1\u8a9e\u3011<a style=\"text-align: center;\" href=\"https:\/\/bsky.app\/profile\/kagakunoneta.bsky.social\">BlueSky<\/a><span style=\"text-align: center;\">\uff0f<\/span><a style=\"text-align: center;\" href=\"https:\/\/www.threads.net\/@science_seeds?hl=ja\">Threads<\/a><\/p>\r\n\r\n<h3 style=\"text-align: center;\"><strong>Explore<\/strong><\/h3>\r\n<ul>\r\n \t<li><a href=\"https:\/\/phys-edu.net\/wp\/?page_id=30764\">\u697d\u3057\u3044\u5b9f\u9a13<\/a>\u2026\u304a\u5b50\u3055\u3093\u3068\u4e00\u7dd2\u306b\u5922\u4e2d\u306b\u306a\u308c\u308b\u30a4\u30c1\u30aa\u30b7\u306e\u79d1\u5b66\u5b9f\u9a13\u3092\u591a\u6570\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u9ad8\u6821\u7269\u7406\u306e\u7406\u89e3\u3092\u6df1\u3081\u308b\u305f\u3081\u306e\u52d5\u753b\u6559\u6750\u3082\u7528\u610f\u3057\u307e\u3057\u305f\u3002<\/li>\r\n \t<li><a href=\"https:\/\/phys-edu.net\/wp\/?page_id=798\">\u7406\u79d1\u306e\u6559\u6750<\/a>\u2026 \u7406\u79d1\u6559\u5e2b\u3092\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\uff01\u6388\u696d\u306e\u8cea\u3092\u9ad8\u3081\u3001\u6e96\u5099\u3092\u52b9\u7387\u5316\u3059\u308b\u305f\u3081\u306e\u9078\u308a\u3059\u3050\u308a\u306e\u6559\u6750\u3092\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\r\n \t<li><a href=\"https:\/\/www.youtube.com\/c\/kkuwako\">Youtube<\/a>\u2026\u79d1\u5b66\u5b9f\u9a13\u7b49\u306e\u52d5\u753b\u3092\u914d\u4fe1\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\r\n \t<li><a href=\"https:\/\/music.youtube.com\/playlist?list=PLoK4ZvKN9S2NgpYIochcQs0aL-vrRB_Qw\">\u79d1\u5b66\u30e9\u30b8\u30aa<\/a>\u00a0\u2026\u79d1\u5b66\u30c8\u30d4\u30c3\u30af\u3092\u307b\u307c\u6bce\u65e5\u914d\u4fe1\u4e2d\uff01AI\u6280\u8853\u3092\u99c6\u4f7f\u3057\u3066\u4f5c\u6210\u3057\u305f\u300c\u8033\u3067\u697d\u3057\u3080\u79d1\u5b66\u300d\u3092\u304a\u5c4a\u3051\u3057\u307e\u3059\u3002<\/li>\r\n \t<li><a href=\"http:\/\/phys-edu.net\/wp\/?page_id=20940\">\u8b1b\u6f14<\/a>\u00a0\u2026\u5168\u56fd\u5404\u5730\u3067\u5b9f\u9a13\u8b1b\u7fd2\u4f1a\u30fb\u30b5\u30a4\u30a8\u30f3\u30b9\u30b7\u30e7\u30fc\u7b49\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002<\/li>\r\n \t<li><a href=\"http:\/\/phys-edu.net\/wp\/?page_id=37\">About<\/a>\u00a0\u2026\u300c\u79d1\u5b66\u306e\u30cd\u30bf\u5e33\u300d\u306e\u30b3\u30f3\u30bb\u30d7\u30c8\u3084\u3001\u904b\u55b6\u8005\u3067\u3042\u308b\u6851\u5b50\u7814\u306e\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb\u30fb\u60f3\u3044\u3092\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u3002<\/li>\r\n \t<li><a href=\"https:\/\/phys-edu.net\/wp\/?page_id=188\">\u304a\u554f\u3044\u5408\u308f\u305b<\/a>\u00a0\u2026\u5b9f\u9a13\u6559\u5ba4\u306e\u3054\u4f9d\u983c\u3001\u57f7\u7b46\u30fb\u8b1b\u6f14\u306e\u76f8\u8ac7\u3001\u79d1\u5b66\u76e3\u4fee\u7b49\u306f\u3053\u3061\u3089\u306e\u30d5\u30a9\u30fc\u30e0\u304b\u3089\u304a\u5bc4\u305b\u304f\u3060\u3055\u3044\u3002<\/li>\r\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>I&#8217;m Ken Kuwako, the Science Trainer. Every day is an experiment. The moment you flip a switch, electric  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":37308,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","sns_share_botton_hide":"","vkExUnit_sns_title":"","vkexunit_cta_each_option":"","_lightning_design_setting":{"layout":"default"},"footnotes":"","jetpack_post_was_ever_published":false},"categories":[781],"tags":[],"class_list":["post-64838","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science-en"],"jetpack_featured_media_url":"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/12\/IMG_4396.jpg","jetpack-related-posts":[{"id":62833,"url":"https:\/\/phys-edu.net\/wp\/?p=62833&lang=en","url_meta":{"origin":64838,"position":0},"title":"The 0.001-Second Standoff: Unmasking the Mystery of Slow-Motion Electricity (Self-Induction Experiment)","author":"\u6851\u5b50 \u7814","date":"2026\u5e744\u670828\u65e5","format":false,"excerpt":"I\u2019m Kuwako Ken, your science trainer\u2014where every d\u2026","rel":"","context":"Science","block_context":{"text":"Science","link":"https:\/\/phys-edu.net\/wp\/?cat=781&lang=en"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2019\/02\/118e33cc7b285327d83d5d2313d7b964.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2019\/02\/118e33cc7b285327d83d5d2313d7b964.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2019\/02\/118e33cc7b285327d83d5d2313d7b964.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2019\/02\/118e33cc7b285327d83d5d2313d7b964.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2019\/02\/118e33cc7b285327d83d5d2313d7b964.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2019\/02\/118e33cc7b285327d83d5d2313d7b964.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":55174,"url":"https:\/\/phys-edu.net\/wp\/?p=55174&lang=en","url_meta":{"origin":64838,"position":1},"title":"The Coil&#8217;s Secret: How to Catch the &#8220;Hold On a Minute!&#8221; Lag of Self-Induction","author":"\u6851\u5b50 \u7814","date":"2025\u5e7410\u670830\u65e5","format":false,"excerpt":"I'm Ken Kuwako, Science Trainer. 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