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

A

only C

B

L and C

C

L and R

D

R and C

Text Solution

Verified by Experts

The correct Answer is:
D
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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-

Knowledge Check

  • In a circuit L, C and R are connected in series with an alternating voltage source of frequency f . The current lead the voltages by 45^(@) . The value of C is :

    A
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    B
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