Question 867563: The power in an electric circuit is directly proportional to the product of the current and the square of the resistance. If the power is 100 watts when the current is 4 amps and the resistance is 5 ohms, find the power when the current is 2 amps and the resistance is 10 ohms.
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! The power in an electric circuit is directly proportional to the product of the current and the square of the resistance. If the power is 100 watts when the current is 4 amps and the resistance is 5 ohms, find the power when the current is 2 amps and the resistance is 10 ohms.
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It's the square of the current times the resistance.
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P = I^2R
The "if" statement is not needed, plus it's wrong
P = 4^2*5 = 80 watts, not 100
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P = 2^2*10 = 40 watts
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