How to Calculate Power in an Electrical Circuit, Where Does the Power Formula Come From?

In this video we look at how to calculate power in a DC or purely resistive AC circuit. We also look at where the basic power formula comes from and how it works whether we're dealing with mains voltage or extra low voltage.

These videos are designed to help learners with the Science and Principles units of the CIty and Guilds 2365 and 5357 and also those studying the EAL Diploma in Electrical Installation.

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