For a transformer, operating at constant load current, maximum efficiency will occur at

Electrical and Electronic Engineering (EEE) : Transformers - Quiz(MCQ)

unity power factor

zero power factor

0.8 lagging power factor

0.8 leading power factor

Correct Answer : Option (A) : unity power factor

Recently Updated in Transformers Questions

Which of the following parts of a transformer is visible from outside?

Core

Bushings

Primary winding

Secondary winding

Correct Answer : Bushings

A no-load test is performed on a transformer to determine

efficiency

copper loss

magnetising current

magnetising current and loss

Correct Answer : magnetising current and loss

Natural oil cooling is used for transformers up to a rating of

250 kVA

500 kVA

1000 kVA

3000 kVA

Correct Answer : 3000 kVA