Question

A 2 ampere current flows in a uniform conductor which has 10^24 free electrons per metre. What is their
average drift velocity?
(1) 1.25 m/s
(2) 125000 m/s
(3) 3 ×10^8 m/s
(4) 1.25 x 10^[-5 ]m/s​

Answer 1

Answer:

option 4

Explanation: I=neAV

n=no of electrons

e=electronic charge

a= area of conductor(not given here)

V=drift velocity

Answer 2

Answer:

(4) 1.25 * 10^- 5 m/s

Explanation:

use the formula I = neAVd          ( n= N/l = 10^24 )

                                                        e = 1.6 * 10^ - 19 C

substitute in the above equation u will get Vd as 1.25 *10^-5 m/s