SOLUTION: Electricity. The power P in an electric circuit varies directly with the square of the current I. If P = 46 when I = 2, find P when I = 5.

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Question 1056250: Electricity. The power P in an electric circuit varies directly with the square of the current I. If P = 46 when I = 2, find P when I = 5.
Answer by Alan3354(69443) About Me  (Show Source):
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Electricity. The power P in an electric circuit varies directly with the square of the current I. If P = 46 when I = 2, find P when I = 5.
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P = I^2*R
46 = 4*R
R = 23/2
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find P when I = 5.
P = 25*23/2
P = 575/2 watts