SSC JE Electrical 2019 with solution SET-1
 Lamp efficiency is measured in

Lux/watt
Candela/watt
Lumen/lux
Lumen/watt

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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
 If an alternator is operating at unity power factor, then its terminal voltage is

Less than the induced EMF, with negative regulation
Less than the induced EMF, with positive voltage regulation
Greater than the induced EMF, with negative voltage regulation
Equal to the induced EMF, with zero voltage regulation

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