Assignment Set-2

A $8 \mu \mathrm{F}$ capacitor is charged to $40 \mathrm{V}$ potential. Battery is then disconnected and inductor of $80 \mathrm{mH}$ is connected across the capacitor such that $\mathrm{LC}$ oscillations are set up. The maximum current in the coil will be

The current / flowing in the $\mathrm{AC}$ source shown in the circuit in ampere is

In the circuit shown, the value of capacitive reactance $X_C$ if net current $\left(l\right)$ is in phase with the applied voltage $\left(V\right)$ is nearly

In the given $\mathrm{AC}$ circuit, capacitance $C$ is adjustable. For what value of $C$, the current amplitude is maximised?

A capacitor is charged and connected to an ideal inductor as shown. If switch $S$ is closed at $t=0$, which of the following graphs represents, magnetic energy $U$ in the inductor as a function of time?

In a series $LCR$ circuit $V_L=3V_R$ and $V_C=2V_R$ Voltage across capacitance

The primary coil of an ideal transformer has $100$ turns and the secondary coil has $600$ turns. Then

An $\mathrm{RLC}$ series circuit is driven by a sinusoidal emf with angular frequency $\omega .$ If $\omega$ is increased without changing the amplitude of the emf the current amplitude increases. It means