Generate an explanation for the following formula: P = I2R

Question

Physics

Mcdaniel

5 December, 21:21

Generate an explanation for the following formula: P = I2R

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Answers (2)

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Agustin Molina · Answer 1

P = IV

Ohms law gives voltage as the product of current and resistance i. e.

V = IR

Replacing this in the previous equation gives

P = I (IR) = I^2R

Explanation:

applying ohms law V=IR

Emily Mcgee · Answer 2

Power is the product of current and voltage:

P = IV

And from Ohm's law, voltage is the product of current and resistance:

V = IR

So substituting this expression for V into the power equation:

P = I (IR)

P = I² R