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RL Circuits - Technical MCQs

Q1:

What is the magnitude of the phase angle between the source voltage and current when a 100 mH inductor with an inductive reactance of 6 komega.gif and a 1 komega.gif resistor are in series with a source?

A 0.1°

B 9.0°

C 61.0°

D 81.0°

ANS:D - 81.0°

If frequency is not given just take it as 50 Hz.

And for that value only the answer is 80.5895 which approximately equal to 81.

XL= 6 Kohm + inductive reactance of 100mh (2*3. 14*50*100*10^-3).