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How is the transient current in a loss-free R-L-C circuit?

How is the transient current in a loss-free R-L-C circuit? Correct Answer Sinusoidal

The correct answer is option 4.

Concept: 

The RLC circuit means the series or parallel connection of the resistance(R), inductor(L), and capacitor(C).

A series circuit is given below.

 Important PointsIf the case would have been of loss-making RLC series circuit then the current would have a damped sinusoidal equation.

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