Question

A type A step down chopper has Vs = 220 V and is connected to RLE load. With R = 1 Ω, E = 24 V and L large enough to maintain continuous conduction. Find the average value of load current for a duty cycle of 30 %.

(a) 100 A

(b) 22 A

(c) 42 A

(d) 16.5 A

The question was posed to me in a national level competition.

The doubt is from Type E Choppers-2 topic in portion Choppers of Power Electronics

Answer 1

Correct answer is (c) 42 A

Easiest explanation: I = (αVs – E)/R = 42 A.