Question

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

Answer 1

Resistance =  ρL/A

so the increase in length and increase in cross sectional area will be cancelled

Therefore,  The resistance will remain unchanged.

Option (c) R is the correct answer.