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A cylindrical conductor of length .l. an...

A cylindrical conductor of length `.l.` and uniform area of cross section .A. has resistance .R.. The area of cross section of another conductor of same material and same resistance but of length .2l. is

A

`(A)/(2)`

B

`(3A)/(2)`

C

2A

D

3A

Text Solution

Verified by Experts

The correct Answer is:
C
Here `R=(rho l)/(A)=(rho(2l))/(A.) rArr A.=2A`
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