Current Electricity Quiz 3

The drift velocity of the free electrons in a conductor is independent of

The direction of drift velocity in a conductor is

The drift velocity of free electrons in a conductor is $V_d$, when the current is flowing in it. If both the radius and current are doubled, the drift velocity will be

The drift velocity vd of electrons varies with electric field strength E as

When a current I is set up in a wire of radius r, the drift speed is v . If the same current is set up through a wire of radius 2r, then the drift speed will be

When potential difference is applied across an electrolyte, then Ohm’s law is obeyed at

A current of 1.6 A is passed through an electric lamp for half a minute. If the charge on the electron is $1.6 \times 10^{-19}$ C, the number of electrons passing through it is

The SI unit of the emf of a cell is

The unit of specific resistance is

If the length of a conductor is halved, then its conductivity will be