{"appState":{"pageLoadApiCallsStatus":true},"articleState":{"article":{"headers":{"creationTime":"2016-03-26T19:06:37+00:00","modifiedTime":"2016-12-27T23:32:09+00:00","timestamp":"2022-09-14T18:16:50+00:00"},"data":{"breadcrumbs":[{"name":"Technology","_links":{"self":"https://dummies-api.dummies.com/v2/categories/33512"},"slug":"technology","categoryId":33512},{"name":"Electronics","_links":{"self":"https://dummies-api.dummies.com/v2/categories/33543"},"slug":"electronics","categoryId":33543},{"name":"General Electronics","_links":{"self":"https://dummies-api.dummies.com/v2/categories/33571"},"slug":"general-electronics","categoryId":33571}],"title":"Ohm’s Law in Electronics","strippedTitle":"ohm’s law in electronics","slug":"ohms-law-in-electronics","canonicalUrl":"","seo":{"metaDescription":"Sometimes in electronics you have no alternative but to whip out your calculator and do a little maths. The most likely reason is to calculate how much resistan","noIndex":0,"noFollow":0},"content":"Sometimes in electronics you have no alternative but to whip out your calculator and do a little maths. The most likely reason is to calculate how much resistance you need for a given situation, how much current a circuit is going to pull or how much voltage will be dropped between two points in a circuit.\r\n\r\nYou can make all these calculations by using one of the following formulas derived from Ohm's law:\r\n\r\n<img src=\"https://www.dummies.com/wp-content/uploads/301663.image0.jpg\" alt=\"image0.jpg\" width=\"149\" height=\"28\" />\r\n\r\n \r\n\r\n<img src=\"https://www.dummies.com/wp-content/uploads/301664.image1.jpg\" alt=\"image1.jpg\" width=\"93\" height=\"67\" />\r\n\r\n \r\n\r\n<img src=\"https://www.dummies.com/wp-content/uploads/301665.image2.jpg\" alt=\"image2.jpg\" width=\"102\" height=\"67\" />\r\n\r\nIn the above formulas, <em>V </em>represents voltage (in volts, naturally), <em>I </em>represents current (in amperes), and <em>R</em> represents resistance in ohms.\r\n\r\n ","description":"Sometimes in electronics you have no alternative but to whip out your calculator and do a little maths. The most likely reason is to calculate how much resistance you need for a given situation, how much current a circuit is going to pull or how much voltage will be dropped between two points in a circuit.\r\n\r\nYou can make all these calculations by using one of the following formulas derived from Ohm's law:\r\n\r\n<img src=\"https://www.dummies.com/wp-content/uploads/301663.image0.jpg\" alt=\"image0.jpg\" width=\"149\" height=\"28\" />\r\n\r\n \r\n\r\n<img src=\"https://www.dummies.com/wp-content/uploads/301664.image1.jpg\" alt=\"image1.jpg\" width=\"93\" height=\"67\" />\r\n\r\n \r\n\r\n<img src=\"https://www.dummies.com/wp-content/uploads/301665.image2.jpg\" alt=\"image2.jpg\" width=\"102\" height=\"67\" />\r\n\r\nIn the above formulas, <em>V </em>represents voltage (in volts, naturally), <em>I </em>represents current (in amperes), and <em>R</em> represents resistance in ohms.\r\n\r\n ","blurb":"","authors":[{"authorId":8946,"name":"Doug Lowe","slug":"doug-lowe","description":" <p><b>Doug Lowe</b> is the bestselling author of more than 40 <i>For Dummies</i> books. 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Ohm’s Law in Electronics

By: Doug Lowe and

Updated: 12-27-2016

From The Book: Electronics All-in-One For Dummies

Electronics All-in-One For Dummies

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Sometimes in electronics you have no alternative but to whip out your calculator and do a little maths. The most likely reason is to calculate how much resistance you need for a given situation, how much current a circuit is going to pull or how much voltage will be dropped between two points in a circuit.

You can make all these calculations by using one of the following formulas derived from Ohm's law:

In the above formulas, V represents voltage (in volts, naturally), I represents current (in amperes), and R represents resistance in ohms.

About This Article

This article is from the book:

Electronics All-in-One For Dummies ,

About the book author:

Doug Lowe is the bestselling author of more than 40 For Dummies books. He's covered everything from Microsoft Office to creating web pages to technologies such as Java and ASP.NET, and has written several editions of both PowerPoint For Dummies and Networking For Dummies.

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