SSC JE Electrical 2019 with solution SET-1
 Which of the following is the correct relation regarding coupled coils?

M = (L1 + L2)/2
M > (L1L2)0.5
M = (L1 − L2)/2
M ≤ (L1L2)0.5

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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?

Fluorescent lamp
Mercury vapor lamp
Sodium vapor lamp
Incandescent 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
Rewireable fuse
Isolator
Circuit breaker

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SSC JE Electrical 2019 with solution SET-1
 _______ is the measuring unit of inductive susceptance

Weber
Tesla
Mho
Henry

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