Question

A cross a wire of length l and thickness d, a p.d of V is applied. If the p.d is doubled the drift velocity becomes.…

(A) becomes double 

(B) becomes half 

(C) Close not change 

(D) becomes Zero

Answer 1

The correct option (A) becomes double

Explanation:

I = nAVd q

V_d = drift Velocity

I = (V/R) where V is potential difference

hence (V/R) = nAVd q

∴ V_d ∝ V

if p.d is doubled then drift velocity also gets doubled.