1.

In the circuit given below, M = 1. The resonant frequency is _______________(a) 145.3 Hz(b) 0.1453 Hz(c) 1.453 Hz(d) 14.53 HzI got this question during an online interview.This intriguing question comes from Advanced Problems on Filters in chapter Filters and Attenuators of Network Theory

Answer»

Correct option is (d) 14.53 HZ

Easy explanation: IEQ = L1 + L2 + 2M

LEQ = 5 + 5 + 2 × 1

= 10 + 2 = 12 H

FO = \(\FRAC{1}{2π\sqrt{LC}}\)

= \(\frac{1}{2π\sqrt{12 × 0.1}}\)

= 0.1453 Hz.



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