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A wire of length L and …

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A wire of length L and resistance R is stretched to get the radius of cross section halved . What is new resistance of the wire after stretching

Posted by Niharika Jorwal 5 years, 4 months ago

CBSE > Class 10 > Science

1 answers

Amrita Kumari 5 years, 4 months ago

Since,cross section is halved then length will be doubled So,earlier R=p(rho)×l/a New will be R=p×2l/a/2 R=4p×l/a New resistance will be 4 times

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