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NEET 2010 (AIPMT, Mains) · LC Oscillations

LC Oscillations question from NEET 2010 (AIPMT, Mains)

Q23NEET 2010 · AIPMT · MAINSEasy

LC Oscillations

A condenser of capacity C is charged to a potential difference of V1. The plates of th condenser are then connected to an ideal inductor of inductance L. The current through the inductor when the potential difference across the condenser reduces to V2 is

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Answer: (d)

Energy lost by the capacitor goes to the inductor.
$\frac{1}{2}CV_1^2 - \frac{1}{2}CV_2^2 = \frac{1}{2}LI^2$
$I = \left(\frac{C(V_1^2 - V_2^2)}{L}\right)^{1/2}$
So the answer is (d).

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