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

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

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SSC JE Electrical 2019 with solution SET-1
 Two bulbs of rating 230V, 60W, and 230V, 100W are connected in parallel across supply mains, Identify the correct statement

Both will glow equally bright
The 100W bulb will glow brighter
The 60W bulb will glow brighter
Neither bulb will glow

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SSC JE Electrical 2019 with solution SET-1
 Three lamps are connected in series across a 120V supply and take a current of 1.5A. If the resistance of two of the lamps is 30Ω, what is the resistance of the third lamp?

10Ω
20Ω
40Ω
30Ω

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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

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

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