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Question

A wire of resistivity $$\displaystyle \rho $$ is stretched to double its length. How does it affect the resistivity? 


A
Resistivity will remain same
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B
Resistivity will get doubled
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C
Resistivity will be four times
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D
Resistivity will be halved
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Solution

The correct option is A Resistivity will remain same
Resistivity is a property of a material that does not depend on the dimensions of the conductor but varies with temperature. Thus resistivity will remain the same even if the length of the wire is doubled.

Physics

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