Question

Calculate the value of Vpeak if crest factor=5 and Vr.m.s=4 V.

(a) 20 V

(b) 30 V

(c) 40 V

(d) 50 V

I had been asked this question during an interview.

The doubt is from Solid-State Devices in section Introduction to Solid-State Devices of Electric Drives

Answer 1

The correct option is (a) 20 V

To explain I would say: The value of the crest factor is Vpeak÷Vr.m.s. The value of Vpeak is (crest factor) × Vr.m.s=5×4=20 V. It signifies the ratio of Vpeak and Vr.m.s.