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.(a) 2.2A(b) 4.2A(c) 6.2A(d) 8.2AI have been asked this question by my college professor while I was bunking the class.Enquiry is from Resistance and Inductance in Series topic in section Single Phase Series Circuits of Basic Electrical Engineering

A resistance of 7 ohm is connected in series with an inductance of 31.

1.	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.(a) 2.2A(b) 4.2A(c) 6.2A(d) 8.2AI have been asked this question by my college professor while I was bunking the class.Enquiry is from Resistance and Inductance in Series topic in section Single Phase Series Circuits of Basic Electrical Engineering
Answer» Right OPTION is (d) 8.2A Explanation: XL=2πf*L = 10 ohm. Z^2=(R^2+XL^2) THEREFORE the TOTAL impedance Z = 12.2ohm. V=IZ, therefore I=V/Z=100/12.2 = 8.2A.

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