Which of the following acts as a protection against high voltage surges due to lightning and switching ?

Related Mcqs:

No-load on a transformer is carried out to determine______________?

A. copper loss B. magnetising current C. magnetising current and loss D. efficiency of the transformer...

The maximum efficiency of a distribution transformer is____________?

A. at no load B. at 50% full load C. at 80% full load D. at full load...

Which of the following property is not necessarily desirable in the material for transformer core ?

A. Mechanical strength B. Low hysteresis loss C. High thermal conductivity D. High permeability...

An ideal transformer is one which has_____________?

A. no losses and magnetic leakage B. interleaved primary and secondary windings C. a common core for its primary and secondary windings D. core of stainless steel and winding of pure copper metal E. none of the above...

In a transformer the resistance between its primary and secondary should be_____________?

A. zero B. 10 Q C. 1000 Q D. infinity...