Physics
Alternating Current
Previous Years Questions

## MCQ (More than One Correct Answer)

The instantaneous voltages at three terminals marked $$X,Y$$ and $$Z$$ are given by $${V_x} = {V_0}\,\sin \,\omega t,$$ $${V_Y} = {V_0}\,\sin$$ $$... A source of constant voltage V is connected to a resistance R and two ideal inductors L1 and L2 through a switch S as shown. There is no mutual induct... In the circuit shown,$$L = 1\,\mu H,C = 1\,\mu F\,$$and$$R = 1\,k\Omega .$$They are connected in series with an a.c. source$$V = {V_0}\sin \om...
At time t = 0, terminal A in the circuit shown in the figure is connected to B by a key and an alternating current I(t) = I0 cos ($$\omega$$t), with I...
In the given circuit, the AC source has $$\omega$$ = 100 rad/s. Considering the inductor and capacitor to be ideal, the correct choice(s) is(are) ...
A series RC-current is connected to AC voltage source. Consider two cases : (A) When C is without a dielectric medium and (B) when C is filled with di...

In Process 1, the energy stored in the capacitor EC and heat dissipated across resistance ED are related by
In Process 2, total energy dissipated across the resistance ED is
An AC voltage source of variable angular frequency $$\omega$$ and fixed amplitude V0 is connected in series with a capacitance C and an electric bulb ...

## Numerical

A series RC combination is connected to an AC voltage of angular frequency $$\omega$$ = 500 rad/s. If the impedance of the RC circuit is R\sqrt{1.25...
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