An inductance of $2\,H$ carries a current of $2\,A$. To prevent sparking when the circuit is broken,a capacitor of $4\,\mu F$ is connected across the inductance. The voltage rating of the capacitor is of the order of

$A$ coil and a bulb are connected in series with a $DC$ source. $A$ soft iron core is then inserted into the coil. What happens to the intensity of the bulb?

The physical quantity which is measured in the unit of $\text{wb A}^{-1}$ is

Two identical coaxial circular loops carry a current $i$ each,circulating in the same direction. If the loops approach each other,then:

The current in the given circuit is increasing at a rate of $\frac{dI}{dt} = 4 \, A/s$. The charge on the capacitor at an instant when the current in the circuit is $2 \, A$ will be: ...... $\mu C$

The switch $S$ of the circuit shown in the figure is closed at $t = 0$. If $e$ denotes the induced emf in the inductor $L$ and $i$ denotes the current flowing through the circuit at time $t$,which of the following graphs correctly represents the variation of $e$ with time $t$?