On which of the following effects of electric current a fuse operates ?

Related Mcqs:

Circuit breakers usually operate under______________?

A. transient state of short-circuit current B. sub-transient state of short-circuit current C. steady state of short-circuit current D. after D.C. component has ceased...

The current zero interruption, in oil and air blast circuit breakers, is achieved by_______________?

A. lengthening of the gap B. cooling and blast effect C. both A. and B D. deionizing the oil with forced air E. none of the above...

The reflection co-efficient at the open circuited end of a transmission line___________?

A. zero B. infinity C. unity D. none of the above...

The under voltage relay can be used for______________?

A. generators B. busbars C. transformers D. motors E. all of the above...

For which of the following ratings of the transformer differential protection is recommended ?

A. above 30 kVA. B. equal to and above 5 MVA C. equal to and above 25 MVA D. none of the above...