Power in Circuits Video Lessons

Concept

# Problem: In this problem you will derive two different formulas for the power delivered to a resistor.What is the power P supplied to a resistor whose resistance is R when it is known that it has a voltage ?V across it?

###### FREE Expert Solution

Power supplied to a resistor:

From Ohm's law, the current through a resistor is:

$\overline{){\mathbf{i}}{\mathbf{=}}\frac{\mathbf{V}}{\mathbf{R}}}$

The power supplied to a resistor is expressed as:

P = Vi

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###### Problem Details

In this problem you will derive two different formulas for the power delivered to a resistor.

What is the power P supplied to a resistor whose resistance is R when it is known that it has a voltage ?V across it?