Question

Transformer utilisation factor of a half wave rectifier is _________

(a) 0.234

(b) 0.279

(c) 0.287

(d) 0.453

This question was addressed to me in an interview for job.

Origin of the question is Half-Wave Rectifier in chapter Application of Diodes of Electronic Devices & Circuits

Answer 1

Correct answer is (c) 0.287

Easy explanation: Transformer utilisation factor is the ratio of AC power delivered to load to the DC power rating. This factor indicates effectiveness of transformer usage by rectifier. For a half wave rectifier, it’s low and equal to 0.287.