SSC JE Electrical 2019 with solution SET-2
The wattage rating of a single-phase induction motor used as a ceiling fan will be in the range of

200 to 500 W
50 to 150 W
10 to 50 W
600 to 800 W

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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

4
8
2
1

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SSC JE Electrical 2019 with solution SET-2
In the two-wattmeter method of three-phase power measurement of a balanced load, if the reading of one meter is −200W, then the power factor of the load is

Equal to zero
Less than 0.5
Equal to 0.5
Greater than 0.5

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SSC JE Electrical 2019 with solution SET-2
______braking is used where the load on the motor has very high inertia (e.g. in electric trains)?

Coasting
Regenerative
Rheostatic
Plugging

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SSC JE Electrical 2019 with solution SET-2
The combined inductance of two coils connected in a series is 0.6H and 0.1H, depending on the relative directions of the currents to the coils. If one of the coils when isolated has a self-inductance of 0.2 H, then calculate the natural inductance?

0.125 H
0.015 H
0.15 H
1.5 H

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