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A resistance of 7 ohm is connected in series with an inductance of 31.8mH. The circuit is connected to a 100V 50Hz sinusoidal supply. Calculate the current in the circuit.

Correct Answer: 8.2A
XL=2*π*f*L = 10 ohm. Z2=(R2+XL2) Therefore the total impedance Z = 12.2ohm. V=IZ, therefore I=V/Z=100/12.2 = 8.2A.

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