SSC JE Electrical 2019 with solution SET-2
During the ______ period the power supply to the motor is cut-off and the train is allowed to run due to its own momentum?

Free running
Notching up
Braking
Coasting

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SSC JE Electrical 2019 with solution SET-2
The number of brushes required for a 4 pole, lap wound DC machine is

1
2
8
4

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SSC JE Electrical 2019 with solution SET-2
A series magnetic circuit will have

Different magnetic flux
Two or more paths for magnetic flux
Same magnetic flux
Total reluctance of a series circuit = difference of the reluctances in different parts of the circuit

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