Question

Calculate the resonant frequency if the values of the capacitor and inductor are 4 F and 4 H.

(a) .25 rad/sec

(b) .26 rad/sec

(c) .28 rad/sec

(d) .29 rad/sec

This question was posed to me during an online interview.

I would like to ask this question from Motors Rating and Heating topic in chapter Rating and Heating of Motors of Electric Drives

Answer 1

Correct answer is (a) .25 rad/sec

To explain: During resonance condition XL=Xc. The value of the resonant frequency is 1÷√LC=1÷√16=.25 rad/sec. The voltage across the capacitor and inductor becomes equal.