Asked by chinaemerem

the electrical resistance of a wire varies inversely as the square of the radius.if the resistance is 0.24ohms the radius is 0.05. Find the resistance when the radius is 0.04. Solve using variation

Answers

Answered by Reiny
R = k/r^2
when R = .24, r = .05
.24 = k/.0025
k = .006

when r = .04
R = .006(1/.0016) = .375
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