SSC JE Electrical 2019 with solution SET-1
 What would the total loss of the 2kVA transformer corresponding to maximum efficiency be, provided the transformer has the iron of 150 W and full-load copper loss of 250W?

500 W
400 W
100 W
300 W

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SSC JE Electrical 2019 with solution SET-1
 Which of the following lamps has the shortest/less life span in working hours?

Mercury vapor lamp
Sodium vapor lamp
Incandescent lamp
Fluorescent lamp

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SSC JE Electrical 2019 with solution SET-1
 Which of the following should be used under no-load conditions?

Air-break switch
Circuit breaker
Rewireable fuse
Isolator

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