The hum in a transformer is mainly attributed to______________?

Related Mcqs:

The purpose of providing an iron core in a transformer is to_____________?

A. provide support to windings B. reduce hysteresis loss C. decrease the reluctance of the magnetic path D. reduce eddy current losses...

Natural oil cooling is used for transformers up to a rating of____________?

A. 3000 kVA B. 1000 kVA C. 500 kVA D. 250 kVA...

The main reason for generation of harmonics in a transformer could be_______________?

A. fluctuating load B. poor insulation C. mechanical vibrations D. saturation of core...

The voltage transformation ratio of a transformer is equal to the ratio of_______________?

A. primary turns to secondary turns B. secondary current to primary current C. secondary induced e.m.f. to primary induced e.m.f D. secondary terminal voltage to primary applied voltage...

Losses which occur in rotating electric machines and do not occur in transformers are___________?

A. friction and windage losses B. magnetic losses C. hysteresis and eddy current losses D. copper losses...