Question

28.) A current of 8 A flows in a metallic conductor of
cross-section 1 cm2 and length 10 km. Free
electron density of copper is 5x1028/
m3. The time
taken by the electron to travel from one end of the
conductor to the other is
(1) 10^8 sec
(2) 10^9 sec
(3) 10^7 sec
(4) 10^5 sec​

Answer 1

Answer

The right answer is 2