Question

A wire of uniform area of cross section is stretched to four times its

original length.By what factor does its resistivity change? (2marks)​

Answer 1

Answer:

A wire of uniform area of cross-section is stretched to four times its original length. By what factor does its resistivity change? Answer: since resistivity depends only on the nature of the material and independent of the dimensions of the wire, resistivity remains the same.

Explanation:

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Answer 2

Answer:

Resistivity will be same ..

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