{"id":134,"date":"2021-12-12T16:07:29","date_gmt":"2021-12-12T16:07:29","guid":{"rendered":"https:\/\/darlotech.co.uk\/?p=134"},"modified":"2026-02-01T23:24:20","modified_gmt":"2026-02-01T23:24:20","slug":"electricity-explained","status":"publish","type":"post","link":"https:\/\/darlotech.co.uk\/?p=134","title":{"rendered":"Electricity explained"},"content":{"rendered":"\n<p>Electricity is somehow difficult to explain, but this picture, source unknown, was posted on LinkedIn recently and is pretty good.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/darlotech.co.uk\/wp-content\/uploads\/2021\/12\/Electricity-explained.png\" alt=\"\" class=\"wp-image-135\" width=\"424\" height=\"316\" srcset=\"https:\/\/darlotech.co.uk\/wp-content\/uploads\/2021\/12\/Electricity-explained.png 625w, https:\/\/darlotech.co.uk\/wp-content\/uploads\/2021\/12\/Electricity-explained-300x224.png 300w, https:\/\/darlotech.co.uk\/wp-content\/uploads\/2021\/12\/Electricity-explained-600x447.png 600w\" sizes=\"auto, (max-width: 424px) 100vw, 424px\" \/><\/figure><\/div>\n\n\n\n<p>The volt is the unit for electric potential, electric potential difference (voltage), and electromotive force (emf), named after the Italian physicist Alessandro Volta (1745\u20131827).<\/p>\n\n\n\n<p>The amp, short for ampere, is the unit of electric current, named after Andr\u00e9-Marie Amp\u00e8re (1775\u20131836), French mathematician and physicist.<\/p>\n\n\n\n<p>The ohm (symbol \u03a9) is the unit of electrical resistance, named after German physicist Georg Simon Ohm (1787-1854). <\/p>\n\n\n\n<p>The relationship between all three for some substances is V = I x R where V is the voltage, I the current (in amps) and R, the resistance in ohms. Materials which follow this rule are called ohmic substances, examples are copper and aluminium.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/darlotech.co.uk\/wp-content\/uploads\/2021\/12\/ohms-1024x489.png\" alt=\"\" class=\"wp-image-145\" width=\"297\" height=\"142\" srcset=\"https:\/\/darlotech.co.uk\/wp-content\/uploads\/2021\/12\/ohms-1024x489.png 1024w, https:\/\/darlotech.co.uk\/wp-content\/uploads\/2021\/12\/ohms-300x143.png 300w, https:\/\/darlotech.co.uk\/wp-content\/uploads\/2021\/12\/ohms-768x367.png 768w, https:\/\/darlotech.co.uk\/wp-content\/uploads\/2021\/12\/ohms-1536x733.png 1536w, https:\/\/darlotech.co.uk\/wp-content\/uploads\/2021\/12\/ohms-600x286.png 600w, https:\/\/darlotech.co.uk\/wp-content\/uploads\/2021\/12\/ohms.png 1552w\" sizes=\"auto, (max-width: 297px) 100vw, 297px\" \/><\/figure><\/div>\n\n\n\n<p>If you plot a graph of V versus I, then for ohmic substances you will get a straight line, or to say in another way, a linear relationship between V and I. <\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/darlotech.co.uk\/wp-content\/uploads\/2021\/12\/ohm_graph-1024x564.png\" alt=\"\" class=\"wp-image-480\" width=\"381\" height=\"210\" srcset=\"https:\/\/darlotech.co.uk\/wp-content\/uploads\/2021\/12\/ohm_graph-1024x564.png 1024w, https:\/\/darlotech.co.uk\/wp-content\/uploads\/2021\/12\/ohm_graph-300x165.png 300w, https:\/\/darlotech.co.uk\/wp-content\/uploads\/2021\/12\/ohm_graph-768x423.png 768w, https:\/\/darlotech.co.uk\/wp-content\/uploads\/2021\/12\/ohm_graph-1536x847.png 1536w, https:\/\/darlotech.co.uk\/wp-content\/uploads\/2021\/12\/ohm_graph-2048x1129.png 2048w, https:\/\/darlotech.co.uk\/wp-content\/uploads\/2021\/12\/ohm_graph-600x331.png 600w\" sizes=\"auto, (max-width: 381px) 100vw, 381px\" \/><\/figure><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Electricity is somehow difficult to explain, but this picture, source unknown, was posted on LinkedIn recently and is pretty good.&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_regular_price":[],"currency_symbol":[],"spay_email":"","footnotes":""},"categories":[17],"tags":[],"class_list":["post-134","post","type-post","status-publish","format-standard","hentry","category-design-2"],"post_slider_layout_featured_media_urls":{"thumbnail":"","post_slider_layout_landscape_large":"","post_slider_layout_portrait_large":"","post_slider_layout_square_large":"","post_slider_layout_landscape":"","post_slider_layout_portrait":"","post_slider_layout_square":"","full":""},"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/darlotech.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/134","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/darlotech.co.uk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/darlotech.co.uk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/darlotech.co.uk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/darlotech.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=134"}],"version-history":[{"count":4,"href":"https:\/\/darlotech.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/134\/revisions"}],"predecessor-version":[{"id":481,"href":"https:\/\/darlotech.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/134\/revisions\/481"}],"wp:attachment":[{"href":"https:\/\/darlotech.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=134"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/darlotech.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=134"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/darlotech.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=134"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}