SSC JE Electrical 2018 with solution SET-1
 Power consumed by a balanced star connected 3-phase load is measured using the two-wattmeter method. The phase voltage and phase current in the load is 220V and 10 A respectively. What will be the difference in reading (in W) of the two wattmeters, if the power factor of the system is 0.8 Lagging?

3810.5
2861.2
2286.3
3048.4

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SSC JE Electrical 2018 with solution SET-1
 A zero watt Lamp consumes

No power
About 15 to 20 W power
About 5 to 7 W power
About 25 to 30 W  Power

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SSC JE Electrical 2018 with solution SET-1
 Determine the percentage voltage error of a potential transformer with the system voltage of 11000 V and having a turn’s ratio of 104 if the measured secondary voltage is 98 V

7.92
6.25
8.84
5.75

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