An electric current is passing through a conductor. If the radius of the conductor is doubled keeping the current constant, the drift velocity of electrons will become:
The current in a conductor varies with time t as I = 2t + 3t² where I is in ampere and t in seconds. The charge that flows through the conductor between t = 2 s and t = 3 s is:
If n is the number density of free electrons, e is the electronic charge, τ is the relaxation time, and m is the mass of electron, then the conductivity σ of the metal is:
