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A resistances wire is stretched so as to...

A resistances wire is stretched so as to double its length. Its new resistivity will have a magnitude

A

2 times its original value

B

4 times its original value

C

8 times its original value

D

same as its original value

Text Solution

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When a wire is stretched, its resistivity remains unchanged. It is because resistivity of a conductor depends only on its material and is independent of its length or cross section area.
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