An ac circuit consists of a 220 mH inductor in series with a 25 pF capacitor and an ac source with an rms voltage of 12 V. At what frequency will the rms voltage across the capacitor be equal to that across the inductor?
A) 94 kHz
B) 15 kHz
C) 68 kHz
D) 426 kHz

Question

Quizplus · Accepted Answer

The resonant frequency of the circuit can be found using the formula:
f = 1 / (2π√(LC))
where L is the inductance in henries and C is the capacitance in farads.

Substituting the given values, we get:
f = 1 / (2π√(220 × 10^-3 × 25 × 10^-12))
f ≈ 68 kHz

Therefore, the answer is (C) 68 kHz.

An Ac Circuit Consists of a 220 MH Inductor in Series