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## Homework Statement

A "90-watt" light bulb uses an average power of 90W when connected to an rms voltage of 120V .

What is the resistance of the lightbulb?

## Homework Equations

P

_{av}=(V

^{2}

_{rms}/R)

## The Attempt at a Solution

90W = 120V

^{2}/R

90W/120V

^{2}= R

R = .00625[tex]\Omega[/tex]

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