SSC JE Electrical 2019 with solution SET-1
If the field of the synchronous motor is under excited the power factor will be:

Zero
Unity
Leading
Lagging

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SSC JE Electrical 2019 with solution SET-1
 If the copper loss of a transformer at half full load is 400 W, then the copper loss corresponding to full load is

400 W
800 W
1200 W
1600 W

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

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

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