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?

2861.2
3048.4
2286.3
3810.5

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SSC JE Electrical 2018 with solution SET-1
 Scott connections are used for

Three Phase to Single Phase transformation
Any of the above
Three-phase to two-phase transformation
Single-phase to three-phase transformation

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SSC JE Electrical 2018 with solution SET-1
 The primary and secondary windings of an Auto-transformer are

Magnetically coupled
None of these
Electrically coupled
Both magnetically and electrically coupled

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SSC JE Electrical 2018 with solution SET-1
 What will be the value of average power (in Watt) of a sinusoidal voltage applied across a series circuit is 20 sinωt V and the current flowing the circuit is 10 sin(ωt + 60)A?

100
50
80
60

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