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A metal wire of circular cross-section h...

A metal wire of circular cross-section has a resistance `R_1` The wire is now stretched without breaking so that its length is doubled and the density is assumed to remain the same. If the resistance of the wire now becomes `R_2` then `R_2:R_1` is

A

`1:1`

B

`1:2`

C

`4:1`

D

`1:4`

Text Solution

Verified by Experts

The correct Answer is:
C
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