UPSEE Solved Model Paper 3

Direction: A voltage source V = V0 sin (100 t) isconnected to a black box in which there can heeither one element out of L, C, R or any two ofthem connected in series.

At steady state the variation of current in the circuitand the source voltage are plotted together withtime, using an oscilloscope, as shown.

If AC source is removed, the circuit is shorted andthen at t=0, a battery of constant emf is connectedacross the black box. The current in the circuit will