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qUESTIONS

A series L-R circuit has impedance ‘Z’ when a.c. source is connected across it. Now, a capacitance is connected in series with L and R in the circuit. The new impedance of the circuit

If maximum energy is stored in a capacitor at t = 0 then find the time after which, the current in the circuit will be maximum for the first time:

The peak value of an alternating e.m.f. given as E = E0 sin wt is 10 V and frequency is 50 Hz. At time t = (1/600) * s instantaneous value of e.m.f. is (sin 30 deg = 0.5 = cos 60 deg)

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