JEE Main 20199 Apr, Evening shiftPhysicsEasyCurrent Electricity150× since 2002
In a conductor, if the number of conduction
electrons per unit volume is 8.5 × 10²⁸ m^–3 and
mean free time is 25ƒs (femto second), it's
approximate resistivity is :-
(m_e = 9.1 × 10^–31 kg)