UPSEE Solved Model Paper 8

Direction : A voltage source V = V0 sin (100 t) is connected to a black box in which there can be either one element out o f L, C, R or any two of them connected in series.

At steady state the variation of current in the circuit and the source voltage areplotted together with time, using an oscilloscope, as shown.

The element(s) present in black box is/are