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

4
8
1
2

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SSC JE Electrical 2019 with solution SET-2
When capacitors are connected in series across DC voltage then_____

The voltage across each capacitor is the same
The charge on each capacitor is the same and the same current flows through each capacitor in a given time
The charge on each capacitor is the same
The same current flows through each capacitor in a given time

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SSC JE Electrical 2019 with solution SET-2
Observe the given figure. The maximum power to the load resistor is when Ri is  =?

RL
Ri/2
2Ri
4Ri

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SSC JE Electrical 2019 with solution SET-2
The flux while crossing air gap tends to bulge outwards, thereby increasing the effective area of the gap, this effect is known as

Hall effect
Stroboscopic effect
Hopkinson’s effect
Fringing effect

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