Question

A wire of resistance R has it length and area of cross-section both doubled. Its resistance will become:
A AR
B) 2R
C) R
D) R/4​

Answer 1

Answer:R

Explanation:We know R=pl/A

Where p=resistivity (constant), l=length and A=cross-sectional area

So if length and area both are doubled then R=p2l/2A

=pl/A

=R

Answer 2

option C is right

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