An inductor is connected in series with a resistor. When a source of alternating voltage is connected across the combination, current is found to lag behind the voltage by an angle of . If and r.m.s. value of supply voltage is 100 volt, then the r.m.s. value of current in the circuit is
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A virtual current of 4A and 50 Hz flows in an ac circuit containing a coil. The power consumed in the coil is 240 W. If the virtual voltage across the coil is 100 V its inductance will be
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