Question

The duty cycle can be written as

(a) f x T

(b) f/T

(c) T/f

(d) f

This question was addressed to me at a job interview.

The query is from Firing Circuits-1 in division Other Circuits of Power Electronics

Answer 1

Correct answer is (a) f x T

Explanation: The duty cycle is defined as the ratio of pulse-on period to periodic time of pulse.

The pulse on period is T, and the periodic time is 1/f.

It is to be noted that T = pulse width whereas f = (1/T1) = frequency of firing or pulse repetition rate.