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A voltage source V=V(0) sin (100 t) is c...

A voltage source `V=V_(0) sin (100 t)` is connected to a black box in which there can be either one element out of `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 are plotted together with time.using an oscilloscope, as shown
If `AC` source is removed, the circuit is shorted for some time so that capacitor is fully discharge and then a battery of constant `EMF` is connected across the black box, at `t=0`.The current in the circuit will-

A

increase exponentially with time constant = 0.02 sec.

B

decrease exponentially with time constant = 0.01 sec.

C

oscillate with angular frequency 20 rad/sec

D

first increase and then decrease

Text Solution

Verified by Experts

The correct Answer is:
B
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