{"id":67513,"date":"2026-09-16T04:35:02","date_gmt":"2026-09-15T19:35:02","guid":{"rendered":"https:\/\/phys-edu.net\/wp\/?p=67513"},"modified":"2026-09-16T04:35:02","modified_gmt":"2026-09-15T19:35:02","slug":"nae-magneettikentta-pascal-johdolla-sahkovirran-nakymattoman-voiman-salaisuus","status":"publish","type":"post","link":"https:\/\/phys-edu.net\/wp\/?p=67513&lang=fi","title":{"rendered":"N\u00e4e magneettikentt\u00e4 Pascal-johdolla! S\u00e4hk\u00f6virran n\u00e4kym\u00e4tt\u00f6m\u00e4n voiman salaisuus"},"content":{"rendered":"<p style=\"text-align: center;\"><strong style=\"color: #339966;\">Olen tiedekouluttaja Ken Kuwako. Jokainen p\u00e4iv\u00e4 on kokeilup\u00e4iv\u00e4.<\/strong><\/p>\n<p data-sourcepos=\"1:1-1:15\"><span style=\"font-size: 14px;\">Miten opetatte oppilaille s\u00e4hk\u00f6virran ja magneettikent\u00e4n v\u00e4list\u00e4 yhteytt\u00e4? Opeteltavana on monia s\u00e4\u00e4nt\u00f6j\u00e4, kuten \u201doikean k\u00e4den ruuvis\u00e4\u00e4nt\u00f6\u201d ja \u201dFlemingin vasemman k\u00e4den s\u00e4\u00e4nt\u00f6\u201d, mutta n\u00e4kym\u00e4tt\u00f6m\u00e4n magneettikent\u00e4n olemassaolon havainnollistaminen oppilaille ei ole aina helppoa.<\/span><\/p>\n<p data-sourcepos=\"5:1-5:267\">T\u00e4ll\u00e4 kertaa esittelen kokeen, jossa tarkastellaan suoran s\u00e4hk\u00f6virran ymp\u00e4rille muodostuvaa magneettikentt\u00e4\u00e4 <strong>Pascalkabelilla<\/strong>. <strong>Pascalkabeli on erityinen johto, jonka sis\u00e4ll\u00e4 on 10 rinnakkain kytketty\u00e4 s\u00e4hk\u00f6johtoa. Vaikka siihen sy\u00f6tett\u00e4isiin n\u00e4enn\u00e4isesti vain 1 A:n virta, se k\u00e4ytt\u00e4ytyy ik\u00e4\u00e4n kuin siin\u00e4 kulkisi 10 A:n virta.<\/strong> Sen avulla voidaan synnytt\u00e4\u00e4 voimakas magneettikentt\u00e4 pienemm\u00e4ll\u00e4 s\u00e4hk\u00f6virralla ja n\u00e4hd\u00e4 magneettikent\u00e4n muoto paljon selvemmin.<\/p>\n<p data-sourcepos=\"5:1-5:267\">Katsokaa t\u00e4m\u00e4 video. Johdon ymp\u00e4rille syntyy voimakas magneettikentt\u00e4, joten kent\u00e4n voi havaita helposti asettamalla sen ymp\u00e4rille kompassineuloja.<\/p>\n<p><iframe loading=\"lazy\" title=\"\u30d1\u30b9\u30ab\u30eb\u96fb\u7dda\u3067\u78c1\u5834\u3092\u300c\u898b\u308b\u300d\uff01\u96fb\u6d41\u304c\u751f\u307f\u51fa\u3059\u898b\u3048\u306a\u3044\u529b\u306e\u6b63\u4f53\" width=\"1140\" height=\"641\" src=\"https:\/\/www.youtube.com\/embed\/z6VKpd4Y8AU?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<p>Tavallisella s\u00e4hk\u00f6johdolla n\u00e4in voimakasta magneettikentt\u00e4\u00e4 on vaikea saada aikaan, joten koe ei onnistu yht\u00e4 n\u00e4ytt\u00e4v\u00e4sti.<\/p>\n<h3 data-sourcepos=\"11:1-11:10\">Tarvikkeet<\/h3>\n<ul data-sourcepos=\"15:1-24:0\">\n<li data-sourcepos=\"15:1-16:99\"><strong>Pascalkabeli<\/strong>: Suoran s\u00e4hk\u00f6virran aiheuttaman magneettikent\u00e4n tarkkailuun ihanteellinen on noin 10 metrin pituinen johto.<br \/>\nLis\u00e4tietoja Pascalkabelista l\u00f6yd\u00e4t t\u00e4\u00e4lt\u00e4. Sen valmistamiseen sopivaa johtoa, kuten <a href=\"https:\/\/amzn.to\/47FsruV\">Fujikaisen VCTF 0.3sq\u00d710-ytiminen johto<\/a>, voi ostaa Amazonista.<\/li>\n<\/ul>\n<blockquote class=\"wp-embedded-content\" data-secret=\"RbnntpNsrX\"><p><a href=\"https:\/\/phys-edu.net\/wp\/?p=23529\">1\u672c\u306710\u672c\u5206\uff01\uff1f \u5b89\u5168\u306b\u300c30\u30a2\u30f3\u30da\u30a2\u7d1a\u300d\u306e\u78c1\u5834\u3092\u4f53\u9a13\u3067\u304d\u308b\u300c\u30d1\u30b9\u30ab\u30eb\u96fb\u7dda\u300d\u306e\u4f5c\u308a\u65b9<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"\u201c1\u672c\u306710\u672c\u5206\uff01\uff1f \u5b89\u5168\u306b\u300c30\u30a2\u30f3\u30da\u30a2\u7d1a\u300d\u306e\u78c1\u5834\u3092\u4f53\u9a13\u3067\u304d\u308b\u300c\u30d1\u30b9\u30ab\u30eb\u96fb\u7dda\u300d\u306e\u4f5c\u308a\u65b9\u201d \u2014 \u79d1\u5b66\u306e\u30cd\u30bf\u5e33\" src=\"https:\/\/phys-edu.net\/wp\/?p=23529&amp;embed=true#?secret=GikCLKBhyl#?secret=RbnntpNsrX\" data-secret=\"RbnntpNsrX\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>\n<ul data-sourcepos=\"15:1-24:0\">\n<li data-sourcepos=\"17:1-17:71\"><strong>Virtal\u00e4hde (tasavirta)<\/strong>: 2 kpl<\/li>\n<li data-sourcepos=\"18:1-18:54\"><strong>Paksu kartonki<\/strong>: Pascalkabelin l\u00e4pivienti\u00e4 varten. Sen kannattaa olla riitt\u00e4v\u00e4n suuri ja paksu, jotta sen voi kiinnitt\u00e4\u00e4 koep\u00f6yt\u00e4\u00e4n.<\/li>\n<li data-sourcepos=\"19:1-19:39\"><strong>Kompassit<\/strong>: Useamman kompassin avulla magneettikent\u00e4n suunnan voi n\u00e4hd\u00e4 samanaikaisesti eri kohdissa.<\/li>\n<li data-sourcepos=\"20:1-20:28\"><strong>Rautajauhetta (tai Magchip-hiukkasia)<\/strong>: Magneettikent\u00e4n muodon n\u00e4kyv\u00e4ksi tekemiseen.<\/li>\n<li data-sourcepos=\"21:1-21:35\"><strong>S\u00e4hk\u00f6johto<\/strong>: Virtal\u00e4hteen ja Pascalkabelin yhdist\u00e4miseen.<\/li>\n<li data-sourcepos=\"22:1-22:31\"><strong>Teline ja kiinnikkeet<\/strong>: Pascalkabelin kiinnitt\u00e4miseen.<\/li>\n<li data-sourcepos=\"23:1-24:0\"><strong>(Tarvittaessa) banaanipistokejohto ja hauenleukaliittimet<\/strong>: Johdotusten helpottamiseen.<\/li>\n<\/ul>\n<h3 data-sourcepos=\"25:1-25:9\">Kokeen suorittaminen<\/h3>\n<p data-sourcepos=\"27:1-27:23\">Katsotaan seuraavaksi, miten koe tehd\u00e4\u00e4n k\u00e4yt\u00e4nn\u00f6ss\u00e4.<\/p>\n<p data-sourcepos=\"29:5-29:18\"><strong>Pascalkabelin levitt\u00e4minen luokkahuoneeseen<\/strong><\/p>\n<p>Ensin Pascalkabeli yhdistet\u00e4\u00e4n tasavirtal\u00e4hteeseen ja johdetaan luokkahuoneen poikki. Olen joskus k\u00e4ytt\u00e4nyt telineit\u00e4, mutta niit\u00e4 ei v\u00e4ltt\u00e4m\u00e4tt\u00e4 tarvita.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-44638 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/61f0d2187136efdbaae4a42733e2978a.jpg\" alt=\"\" width=\"523\" height=\"359\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/61f0d2187136efdbaae4a42733e2978a.jpg 2020w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/61f0d2187136efdbaae4a42733e2978a-300x206.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/61f0d2187136efdbaae4a42733e2978a-1024x703.jpg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/61f0d2187136efdbaae4a42733e2978a-768x527.jpg 768w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/61f0d2187136efdbaae4a42733e2978a-1536x1054.jpg 1536w\" sizes=\"auto, (max-width: 523px) 100vw, 523px\" \/><\/p>\n<p>Kun kaksi virtal\u00e4hdett\u00e4 kytket\u00e4\u00e4n sarjaan, johdossa voidaan saada kulkemaan suurempi virta. Jos kokeilette t\u00e4t\u00e4, pyyd\u00e4n kuitenkin huomioimaan, ett\u00e4 vastuu kokeen turvallisesta toteuttamisesta on kokeen suorittajalla.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-67500 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-09-15-17.39.44.jpeg\" alt=\"\" width=\"434\" height=\"435\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-09-15-17.39.44.jpeg 1452w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-09-15-17.39.44-300x300.jpeg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-09-15-17.39.44-1021x1024.jpeg 1021w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-09-15-17.39.44-150x150.jpeg 150w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-09-15-17.39.44-768x770.jpeg 768w\" sizes=\"auto, (max-width: 434px) 100vw, 434px\" \/><\/p>\n<p>T\u00e4ss\u00e4 n\u00e4ette, milt\u00e4 koe n\u00e4ytt\u00e4\u00e4 k\u00e4yt\u00e4nn\u00f6ss\u00e4.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-67501 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8_2026-09-15_17_39_36.jpg\" alt=\"\" width=\"524\" height=\"313\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8_2026-09-15_17_39_36.jpg 1716w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8_2026-09-15_17_39_36-300x179.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8_2026-09-15_17_39_36-1024x611.jpg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8_2026-09-15_17_39_36-768x458.jpg 768w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8_2026-09-15_17_39_36-1536x917.jpg 1536w\" sizes=\"auto, (max-width: 524px) 100vw, 524px\" \/><\/p>\n<p data-sourcepos=\"33:5-33:19\"><strong>Magneettikent\u00e4n tarkkailu kompasseilla<\/strong>:<\/p>\n<p>Aseta useita kompasseja paksun kartongin ymp\u00e4rille. Kun kompassit asetetaan ympyr\u00e4n muotoon Pascalkabelin ymp\u00e4rille, magneettikent\u00e4n suunta on erityisen helppo havaita. T\u00e4ss\u00e4 tilanne ennen s\u00e4hk\u00f6virran kytkemist\u00e4.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-67499 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-09-15-17.39.18.jpeg\" alt=\"\" width=\"420\" height=\"413\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-09-15-17.39.18.jpeg 1350w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-09-15-17.39.18-300x295.jpeg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-09-15-17.39.18-1024x1006.jpeg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-09-15-17.39.18-768x754.jpeg 768w\" sizes=\"auto, (max-width: 420px) 100vw, 420px\" \/><\/p>\n<p>Kun virta kytket\u00e4\u00e4n, tilanne n\u00e4ytt\u00e4\u00e4 t\u00e4lt\u00e4.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-67498 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-09-15-17.39.11.jpeg\" alt=\"\" width=\"427\" height=\"378\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-09-15-17.39.11.jpeg 1230w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-09-15-17.39.11-300x265.jpeg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-09-15-17.39.11-1024x906.jpeg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-09-15-17.39.11-768x679.jpeg 768w\" sizes=\"auto, (max-width: 427px) 100vw, 427px\" \/><\/p>\n<p>Kokeilin my\u00f6s asettaa johdon ympyr\u00e4n muotoon ja ripotella sen ymp\u00e4rille rautajauhetta.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-44639 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/ac7c3bfe415b238d861ec4938799f560.jpg\" alt=\"\" width=\"434\" height=\"385\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/ac7c3bfe415b238d861ec4938799f560.jpg 1262w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/ac7c3bfe415b238d861ec4938799f560-300x266.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/ac7c3bfe415b238d861ec4938799f560-1024x907.jpg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/ac7c3bfe415b238d861ec4938799f560-768x680.jpg 768w\" sizes=\"auto, (max-width: 434px) 100vw, 434px\" \/><\/p>\n<p>Kun rautajauhetta on ripoteltu p\u00e4\u00e4lle ja levy\u00e4 kopautetaan kevyesti,<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-44642 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/61ac57f947e7c1a03b66e63dcf7c88e7.jpg\" alt=\"\" width=\"477\" height=\"380\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/61ac57f947e7c1a03b66e63dcf7c88e7.jpg 1328w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/61ac57f947e7c1a03b66e63dcf7c88e7-300x239.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/61ac57f947e7c1a03b66e63dcf7c88e7-1024x816.jpg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/61ac57f947e7c1a03b66e63dcf7c88e7-768x612.jpg 768w\" sizes=\"auto, (max-width: 477px) 100vw, 477px\" \/><\/p>\n<p>syntyy kuvio.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-44645 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/e0afa0f9810ee92689ed51e23702be20.jpg\" alt=\"\" width=\"393\" height=\"284\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/e0afa0f9810ee92689ed51e23702be20.jpg 1390w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/e0afa0f9810ee92689ed51e23702be20-300x217.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/e0afa0f9810ee92689ed51e23702be20-1024x740.jpg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/e0afa0f9810ee92689ed51e23702be20-768x555.jpg 768w\" sizes=\"auto, (max-width: 393px) 100vw, 393px\" \/><\/p>\n<p>Kun kuvaa suurennetaan,<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-44681\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/d099aca6189339d8ded7c6310f4a8309.jpg\" alt=\"\" width=\"391\" height=\"370\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/d099aca6189339d8ded7c6310f4a8309.jpg 1128w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/d099aca6189339d8ded7c6310f4a8309-300x284.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/d099aca6189339d8ded7c6310f4a8309-1024x970.jpg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/d099aca6189339d8ded7c6310f4a8309-768x727.jpg 768w\" sizes=\"auto, (max-width: 391px) 100vw, 391px\" \/><\/p>\n<p>rautajauheen muodostamat kuviot asettuvat renkaan muotoon.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-44682\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/fbc25fef24b71358cd8605adaa7ae761.jpg\" alt=\"\" width=\"393\" height=\"240\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/fbc25fef24b71358cd8605adaa7ae761.jpg 1894w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/fbc25fef24b71358cd8605adaa7ae761-300x183.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/fbc25fef24b71358cd8605adaa7ae761-1024x626.jpg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/fbc25fef24b71358cd8605adaa7ae761-768x470.jpg 768w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/fbc25fef24b71358cd8605adaa7ae761-1536x939.jpg 1536w\" sizes=\"auto, (max-width: 393px) 100vw, 393px\" \/><\/p>\n<p>Kun alueelle asetetaan kompassi, my\u00f6s magneettikent\u00e4n suunta k\u00e4y selv\u00e4sti ilmi.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-44641 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/c1889c020d4e60c5fc04592b4e06667e.jpg\" alt=\"\" width=\"432\" height=\"380\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/c1889c020d4e60c5fc04592b4e06667e.jpg 1310w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/c1889c020d4e60c5fc04592b4e06667e-300x264.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/c1889c020d4e60c5fc04592b4e06667e-1024x900.jpg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/01\/c1889c020d4e60c5fc04592b4e06667e-768x675.jpg 768w\" sizes=\"auto, (max-width: 432px) 100vw, 432px\" \/><\/p>\n<p data-sourcepos=\"54:1-54:37\">T\u00e4m\u00e4n kokeen avulla oppilaat voivat syvent\u00e4\u00e4 useita t\u00e4rkeit\u00e4 fysiikan ja luonnontieteiden k\u00e4sitteit\u00e4.<\/p>\n<p><strong>S\u00e4hk\u00f6virran ja magneettikent\u00e4n v\u00e4linen yhteys<\/strong>: Kun s\u00e4hk\u00f6virta kulkee johtimessa, sen ymp\u00e4rille syntyy magneettikentt\u00e4.<\/p>\n<p><strong>Magneettikent\u00e4n suunta<\/strong>: Suoran virtajohtimen ymp\u00e4rille syntyv\u00e4 magneettikentt\u00e4 muodostaa samankeskisi\u00e4 ympyr\u00f6it\u00e4 virran suunnan ymp\u00e4rille oikean k\u00e4den ruuvis\u00e4\u00e4nn\u00f6n mukaisesti.<\/p>\n<p><strong>Magneettikent\u00e4n voimakkuus<\/strong>: Mit\u00e4 suurempi s\u00e4hk\u00f6virta on, sit\u00e4 voimakkaampi magneettikentt\u00e4 syntyy (Pascalkabelin vaikutus).<\/p>\n<p><strong>Magneettikent\u00e4n viivat<\/strong>: Rautajauheen muodostama kuvio havainnollistaa magneettikent\u00e4n viivoja. Magneettikent\u00e4n viivat l\u00e4htev\u00e4t pohjoisnavasta ja p\u00e4\u00e4ttyv\u00e4t etel\u00e4napaan muodostaen suljetun kokonaisuuden ilman katkoja.<\/p>\n<p><strong>K\u00e4\u00e4min magneettikentt\u00e4<\/strong>: Kun k\u00e4\u00e4miss\u00e4 kulkee s\u00e4hk\u00f6virta, sen sis\u00e4lle syntyy l\u00e4hes tasainen magneettikentt\u00e4, kun taas k\u00e4\u00e4min ulkopuolella muodostuu sauvamagneettia muistuttava magneettikentt\u00e4.<\/p>\n<p>Pascalkabelin avulla t\u00e4llaisesta kokeesta saa n\u00e4ytt\u00e4v\u00e4n ja helposti havainnollistettavan. Sille l\u00f6ytyy varmasti monenlaisia k\u00e4ytt\u00f6tarkoituksia \u2013 kokeilkaa rohkeasti!<\/p>\n<h3>Yhteydenotot ja ty\u00f6pyynn\u00f6t<\/h3>\n<p>Tuodaan tieteen ihmeet ja kiinnostavuus l\u00e4hemm\u00e4s arkea! Sivustolla esittelen hauskoja luonnontieteellisi\u00e4 kokeita, joita voi tehd\u00e4 my\u00f6s kotona, sek\u00e4 annan vinkkej\u00e4 niiden toteuttamiseen. Tutustukaa ja etsik\u00e4\u00e4 sivustolta erilaisia kokeita!<br \/>\n\u30fbTietoa sivuston yll\u00e4pit\u00e4j\u00e4st\u00e4 Ken Kuwakosta l\u00f6yd\u00e4t <a href=\"https:\/\/phys-edu.net\/wp\/?page_id=37\">t\u00e4\u00e4lt\u00e4<\/a><br \/>\n\u30fbErilaiset ty\u00f6pyynn\u00f6t (kirjoittaminen, luennot, tiedekerhot, televisio-ohjelmien tieteellinen valvonta ja esiintymiset jne.) l\u00f6ytyv\u00e4t <a href=\"https:\/\/phys-edu.net\/wp\/?page_id=188\">t\u00e4\u00e4lt\u00e4<\/a><br \/>\n<span class=\"s2\">\u30fbSaat tiedon uusista artikkeleista <a href=\"https:\/\/x.com\/kuwako\">X:ss\u00e4<\/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\">Tiedeaiheisella kanavallani<\/a> julkaisen videoita erilaisista kokeista!<\/p>\n<h3>\uff19\u6708\u306e\u30a4\u30c1\u30aa\u30b7\u5b9f\u9a13\uff01<\/h3>\r\n\u304a\u5f01\u5f53\u7bb1\u3092\u30d7\u30e9\u30d0\u30f3\u304c\u308f\u308a\u306b\u3057\u3066\u30ad\u30fc\u30db\u30eb\u30c0\u30fc\u3092\u4f5c\u308d\u3046\uff01\r\n<p style=\"text-align: center;\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=35313\">\u30d7\u30e9\u30b9\u30c1\u30c3\u30af\u304a\u5f01\u5f53\u7bb1\u3092\u4f7f\u3063\u305f\u30ad\u30fc\u30db\u30eb\u30c0\u30fc\u4f5c\u308a\uff01<\/a><\/p>\r\n<p style=\"text-align: center;\"><img class=\"alignnone wp-image-35705 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/04\/69951296b11caa484208330661c3ad16.jpg\" sizes=\"auto, (max-width: 449px) 100vw, 449px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/04\/69951296b11caa484208330661c3ad16.jpg 1008w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/04\/69951296b11caa484208330661c3ad16-300x130.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/04\/69951296b11caa484208330661c3ad16-768x334.jpg 768w\" alt=\"\" width=\"449\" height=\"195\" \/><\/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>\uff18\u6708\uff12\uff17\u65e5\uff08\u6728\uff09\u79d1\u5b66\u76e3\u4fee\u756a\u7d44\u653e\u9001\u4e88\u5b9a<\/li>\r\n \t<li>\uff19\u6708\uff12\uff10\u65e5\uff08\u65e5\uff09\u30c0\u30d3\u30f3\u30c1\u30de\u30b9\u30bf\u30fc\u30ba\u51fa\u6f14\u4e88\u5b9a<\/li>\r\n \t<li>\uff11\uff10\u6708\uff11\uff10\u65e5\uff08\u571f\uff0911:15~12:00\u3000<a href=\"https:\/\/phys-edu.net\/wp\/?p=66205\">\u5343\u8449\u5e02\u79d1\u5b66\u30d5\u30a7\u30b9\u30bf2026\u300c\u6851\u5b50\u5148\u751f\u306e\u56de\u8ee2\u79d1\u5b66\u30b7\u30e7\u30fc\u300d\u306b\u3066\u30b5\u30a4\u30a8\u30f3\u30b9\u30b7\u30e7\u30fc\u3092\u884c\u3044\u307e\u3059<\/a>\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>\u300e<a href=\"https:\/\/phys-edu.net\/wp\/?p=64462\">\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<a href=\"https:\/\/phys-edu.net\/wp\/?p=64462\"><img class=\"alignnone  wp-image-65097 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/07\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-07-04-8.40.17.jpeg\" alt=\"\" width=\"172\" height=\"244\" \/><\/a>\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\" \/><\/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>Olen tiedekouluttaja Ken Kuwako. Jokainen p\u00e4iv\u00e4 on kokeilup\u00e4iv\u00e4. Miten opetatte oppilaille s\u00e4hk\u00f6virran ja magn [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":44639,"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":[1630],"tags":[],"class_list":["post-67513","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category--fi"],"jetpack-related-posts":[{"id":67445,"url":"https:\/\/phys-edu.net\/wp\/?p=67445&lang=fi","url_meta":{"origin":67513,"position":0},"title":"Napauta vain \u2013 ja esiin nousee magneettikentt\u00e4viivojen salaper\u00e4inen kuvio (Magneettikent\u00e4n havainnointi)","author":"\u6851\u5b50 \u7814","date":"2026\u5e749\u670814\u65e5","format":false,"excerpt":"Olen tiedekouluttaja Ken Kuwako. 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