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The figure shows an RC circuit with a pa...

The figure shows an RC circuit with a parallel plate capacitor. Before switching on the circuit, plate A of the capacitor has a charge. `-Q_(0)` while plate B has no net charge. If at `t = 0`, the switch is closed then after how much time (in seconds) will the net charge on plate A becomes zero? [Given : `C = 1 mu F, Q_(0) = 1 mC, epsilon = 1000 V and R = (2 xx 10^(6))/(1n 3) Omega]`

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