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Solution: What will its resistance be if it is uniformly stretched so that its length becomes 12m?

(Last Updated On: January 20, 2020)

What will its resistance be if it is uniformly stretched so that its length becomes 12 m?

Problem Statement: ECE Board April 1990

The resistance of a wire varies directly with its length and inversely with its area. If a certain piece of wire 10 m long and 0.10 cm in diameter has a resistance of 100 ohms, what will its resistance be if it is uniformly stretched so that its length becomes 12 m?

Problem Answer:

The resistance of the wire will become 144 ohms.

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Solution: What will its resistance be if it is uniformly stretched so that its length becomes 12m?

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