SSC JE Electrical 2018 with solution SET-1
The speed of a synchronous motor can be changed by

Changing the frequency
Changing the load
Changing the supply Terminals
Changing the supply voltage

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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
60
80

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

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

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

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

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