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Electrostatic Potential And Capacitance

Question

Wired Faculty App

C.O.S. is a change over switch. Work out current in the circuit shown in figure, when switch is connecting (i) 1 and 2, (ii) 1 and 3, and the circuits are resonating.

Solution

(i) When switch is connecting 1 and 2, L, Cand R are in series.
At resonance,

Z = R

∴

I_{v} = \frac{E_{v}}{Z} = \frac{E_{v}}{R}

(ii) When switch is connecting 2 and 3, the circuit becomes parallel resonance circuit.
At resonance,
I_v = 0.

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