{"id":1791,"date":"2013-12-17T00:05:12","date_gmt":"2013-12-16T23:05:12","guid":{"rendered":"http:\/\/helpmyphysics.co.uk\/wordpress\/?p=1791"},"modified":"2022-05-01T17:32:41","modified_gmt":"2022-05-01T16:32:41","slug":"the-wheatstone-bridge","status":"publish","type":"post","link":"https:\/\/helpmyphysics.co.uk\/wordpress\/?p=1791","title":{"rendered":"The Wheatstone Bridge."},"content":{"rendered":"\n<object classid=\"clsid:D27CDB6E-AE6D-11cf-96B8-444553540000\"\n\t\t\tid=\"fm_wheatstonebridge_2047338411\"\n\t\t\tclass=\"flashmovie\"\n\t\t\twidth=\"550\"\n\t\t\theight=\"450\">\n\t<param name=\"movie\" value=\"http:\/\/www.helpmyphysics.co.uk\/wheatstonebridge.swf\" \/>\n\t<!--[if !IE]>-->\n\t<object\ttype=\"application\/x-shockwave-flash\"\n\t\t\tdata=\"http:\/\/www.helpmyphysics.co.uk\/wheatstonebridge.swf\"\n\t\t\tname=\"fm_wheatstonebridge_2047338411\"\n\t\t\twidth=\"550\"\n\t\t\theight=\"450\">\n\t<!--<![endif]-->\n\t\t\n\t<!--[if !IE]>-->\n\t<\/object>\n\t<!--<![endif]-->\n<\/object>\n<p>Roll the mouse over the instructions and the think physics button for more information.<\/p>\n<p>The Wheatstone Bridge is used to find the value of an unknown resistor.<\/p>\n<p>When there is no p.d. across the bridge the we say the Wheatstone Bridge is balanced.<\/p>\n<p>If the value of resistance in the decade box is changed then it follows there is a direct proportional change in the current that will flow across the bridge.<\/p>\n<p><a href=\"https:\/\/helpmyphysics.co.uk\/wordpress\/wp-content\/uploads\/2013\/12\/wheatstonepractical02.clipular.png\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/helpmyphysics.co.uk\/wordpress\/wp-content\/uploads\/2013\/12\/wheatstonepractical02.clipular-300x185.png\" alt=\"wheatstonepractical02.clipular\" width=\"300\" height=\"185\" class=\"aligncenter size-medium wp-image-1793\" srcset=\"https:\/\/helpmyphysics.co.uk\/wordpress\/wp-content\/uploads\/2013\/12\/wheatstonepractical02.clipular-300x185.png 300w, https:\/\/helpmyphysics.co.uk\/wordpress\/wp-content\/uploads\/2013\/12\/wheatstonepractical02.clipular.png 575w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>Provided the resistance is not changed too much away from the balance point then it can be written<\/p>\n<p><a href=\"https:\/\/helpmyphysics.co.uk\/wordpress\/wp-content\/uploads\/2013\/12\/daum_equation_1387234537953.png\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/helpmyphysics.co.uk\/wordpress\/wp-content\/uploads\/2013\/12\/daum_equation_1387234537953-300x46.png\" alt=\"daum_equation_1387234537953\" width=\"300\" height=\"46\" class=\"aligncenter size-medium wp-image-1797\" srcset=\"https:\/\/helpmyphysics.co.uk\/wordpress\/wp-content\/uploads\/2013\/12\/daum_equation_1387234537953-300x46.png 300w, https:\/\/helpmyphysics.co.uk\/wordpress\/wp-content\/uploads\/2013\/12\/daum_equation_1387234537953.png 344w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.magnet.fsu.edu\/education\/tutorials\/java\/wheatstonebridge\/\" target=\"_blank\" rel=\"noopener\">Further info about the Wheatstone Bridge<\/a><br \/>\n<a href=\"http:\/\/www.bbc.co.uk\/bitesize\/higher\/physics\/elect\/resistors\/revision\/3\/\" target=\"_blank\" rel=\"noopener\">BBC Bitesize Higher Physics: Wheatstone Bridge<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Roll the mouse over the instructions and the think physics button for more information. The Wheatstone Bridge is used to find the value of an unknown resistor. When there is no p.d. across the bridge the we say the Wheatstone Bridge is balanced. If the value of resistance in the decade box is changed then [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[48,58,46,50],"class_list":["post-1791","post","type-post","status-publish","format-standard","hentry","category-higher-physics","tag-electricity","tag-higher-physics","tag-unit-2","tag-wheatstone-bridge"],"_links":{"self":[{"href":"https:\/\/helpmyphysics.co.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1791","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/helpmyphysics.co.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/helpmyphysics.co.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/helpmyphysics.co.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/helpmyphysics.co.uk\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1791"}],"version-history":[{"count":9,"href":"https:\/\/helpmyphysics.co.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1791\/revisions"}],"predecessor-version":[{"id":2150,"href":"https:\/\/helpmyphysics.co.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1791\/revisions\/2150"}],"wp:attachment":[{"href":"https:\/\/helpmyphysics.co.uk\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1791"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/helpmyphysics.co.uk\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1791"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/helpmyphysics.co.uk\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}