Question

What is the capacitive reactance of a 5 μF capacitor when it is a part of a circuit whose frequency is 50 Hz?

(a) 636.6 Ω

(b) 1636.6 Ω

(c) 2636.6 Ω

(d) 4636.6 Ω

The question was posed to me in an online interview.

Origin of the question is AC Voltage Applied to a Capacitor topic in division Alternating Current of Physics – Class 12

Answer 1

Correct choice is (a) 636.6 Ω

To explain I would say: Xc = \(\frac {1}{2πfC}\)

Xc = \(\frac {1}{(2 \times 3.14 \times 50 \times 5 \times 10^{-6})}\)

Xc = 636.6 Ω.