Question

A 1.5 μF capacitor is connected to a 220 V, 50 Hz source. Find the capacitive reactance in the circuit.

(a) 2120 Ω

(b) 21.2 Ω

(c) 212 Ω

(d) 2.12 Ω

The question was asked at a job interview.

The above asked question is from AC Voltage Applied to a Capacitor in section Alternating Current of Physics – Class 12

Answer 1

Correct answer is (c) 212 Ω

Easy explanation: Xc = \(\frac {1}{2πfC}\)

Xc = \(\frac {1}{(2 \times 3.14 \times 50 \times 1.50 \times 10^{-6})}\)

Xc = 212 Ω