Question

Assertion (A) : When three electric bulbs of power 200 W, 100 W and 50 W are connected in series to a source, the power consumed by the 50 W bulb is maximum. Reason (R) : In a series circuit, current is the same through each bulb, but the potential difference across each bulb is different.

Define mobility of electrons. Give its SI units.

A steady current flows through a wire AB, as shown in the figure. What happens to the electric field and the drift velocity along the wire ? Justify your answer.

Consider the circuit shown in the figure. Find the effective resistance of the circuit and the current drawn from the battery.