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A cylindrical wire of length L and radius r has a resistance R. The resistance of another wire of the same material but half its length and half its r
Question

A cylindrical wire of length L and radius r has a resistance R. The resistance of another wire of the same material but half its length and half its radius will be:

A.

R

B.

R/2

C.

2R

D.

4R

Correct option is C



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