Assertion : When a conducting rod moves in uniform transverse magnetic field with uniform speed which is perpendicular to its length, then potential difference may develop across its ends.
Reason : In any conductor, free electrons and free positive ions are available.

Assertion The quantity$L / R$ possesses dimensions of time.
Reason To reduce the rate of increase of current through a solenoid, we should increase the time constant $(L / R)$

Assertion : The possibility of an electric bulb fusing is higher at the time of switch OFF.

Reason : Inductive effects produce a surge at the time of switch-off. 

In shown circuit switch is closed at t = 0. 

Assertion : At t = 0, current through battery $I=\frac{E}{2R}$ and at $t=\infty$, current through battery will be $I=\frac{E}{R}.$
Reason : At $t=0,$ inductor will behave like open circuit and at $t=\infty ,$ inductor will behave like short circuit.