The resistance of a copper wire 200 m long is 21 Q. If its thickness (diameter) is 0.44 mm, its specific resistance is around________?

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Academy of PakistanTest & Learning

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3589Electrical EngineeringMedium

A1.8 x 10″8 Q-m

B1.4 x 10~8 Q-m

C1.2 x 10~8 Q-m

D1.6 x 10″”8 Q-m

Correct answer

D. 1.6 x 10″”8 Q-m

Explanation

The correct answer is 1.6 x 10″”8 Q-m.

The resistance of a copper wire 200 m long is 21 Q. If its thickness (diameter) is 0.44 mm, its specific resistance is around________? - Answer and Explanation | Academy of Pakistan