SSC JE Electrical 2019 with solution SET-1
In the two wattmeter method, the readings of the two wattmeters are 500W, 500W respectively. The load power factor in a balanced 3-phase 3-wire circuit is:

0.9
1
0.8
0.5

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SSC JE Electrical 2019 with solution SET-1
 In an AC network, the load connected is (10 + j10). The phase relation between the voltage applied and the current through the load is:

Voltage lags current by 30°
Voltage leads current by 45°
Voltage lags current by 45°
Voltage and current are in phase with each other

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

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