{"id":15892,"date":"2020-09-09T14:48:27","date_gmt":"2020-09-09T13:48:27","guid":{"rendered":"https:\/\/www.essexham.co.uk\/train\/?page_id=15892"},"modified":"2020-09-14T11:37:20","modified_gmt":"2020-09-14T10:37:20","slug":"using-the-ohms-law-triangle","status":"publish","type":"page","link":"https:\/\/www.essexham.co.uk\/train\/using-the-ohms-law-triangle\/","title":{"rendered":"Using The Ohm’s Law Triangle (Video)"},"content":{"rendered":"

For your amateur radio Foundation exam, you will be expected to know the formula associated with resistance – this is known as Ohm’s Law<\/p>\n

The formula is V (Voltage) = I (Current) x R (Resistance)<\/p>\n

This can be expressed in three different ways:<\/p>\n

Voltage (V) = Current (I) x Resistance (R)<\/p>\n

Current (I) = Voltage (V) \/ Resistance (R)<\/p>\n

Resistance (R) = Voltage (V) \/ Current (I)<\/p>\n

In the exam, you may be given a question where you are given two of the values, and be expected to calculate the third.<\/p>\n

One of the best ways to help cope with calculating Ohm’s Law, is “the triangle”.<\/p>\n

\"The
The Ohm’s Law Triangle<\/figcaption><\/figure>\n

Cover up the letter for the value you want to calculate, to see what to do with the other two values to get the right answer.<\/p>\n

As using the triangle generates lots of questions for students on our course, here’s a video showing just how to use it – with examples.<\/p>\n

Please get a pen and piece of paper… and watch the following…<\/p>\n\n\n\n