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Q.

In the given circuit, initially the charge on capacitor is  Q0 . At t = 0 switch S is closed. Which of the following statement(s) is/are correct?

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a

Maximum current through the inductor is Q0LC

b

Charge on the capacitor is zero at t=π2LC

c

Current through the inductor is maximum at t=π2LC

d

Maximum magnetic energy can be stored in the inductor is Q022C

answer is A.

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Detailed Solution

Charge on capacitor at time t isq=Q0cos⁡ωtWhere ω=1LCAt ωt=π2,q=0⇒t=π2LCBy conservation of energyQ022C=12Limax2⇒imax=Q0LC
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