- #1

arod2812

- 25

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## Homework Statement

A 60-W lamp is placed in series with a resistor and a 120-V source. If the voltage across the lamp is 35-V, what is the resistance (R) of the resistor?

## Homework Equations

I am pretty sure I am using the right equation, but I am not getting the right answer. What am I doing wrong?

## The Attempt at a Solution

P=IV --> 60W=I(120V) --> I=-.50 A

R=V/I --> (120V-35V)/.5A = 170 ohms (this is what I calculated but it isn't the right answer)