MGVCL Exam Paper (30-07-2021 Shift 2)
A coil having an inductance of 100 mH is magnetically coupled to another coil having an inductance of 900 mH. The coefficient of coupling between the coils is 0.45. Calculate the equivalent inductance if the two coils are connected in series opposing.

730 mH
1135 mH
932 mH
1270 mH

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MGVCL Exam Paper (30-07-2021 Shift 2)
In circuit breaker, the term MCCB stands for

miniature case circuit breaker
modern closed circuit breaker
miniature compact circuit breaker
moulded case circuit breaker

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MGVCL Exam Paper (30-07-2021 Shift 2)
The miniature circuit breaker (MCB) with Class D trip characteristics trips instantaneously when the current flowing through it reaches ____ the rated current.

between 10 to 20 times
between 2 to 3 times
between 3 to 5 times
between 5 to 10 times

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