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A 420 W vacuum cleaner is designed to operate 120 V. What is its resistance?
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A 420 W vacuum cleaner is designed to operate 120 V. What is its resistance?

User Marco Ferrari
by
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1 Answer

3 votes
Power consumption is given by
P=V^2/R
So 420 = (120^2)/R
Solving for R gives
R = (120^2)/420
R = 34.29 ohms
User Dpacman
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