SSC JE Electrical 2019 with solution SET-2
For indoor lighting the range of space : height is

1 : 2
5 : 6
2 : 3
3 :4

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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

Stroboscopic effect
Hopkinson’s effect
Fringing effect
Hall effect

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SSC JE Electrical 2019 with solution SET-2
Form Factor × Peak Factor =?

RMS Value/Average Value
Maximum Value/Average Value
Average Value Maximum Value
Maximum Value/RMS Value

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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
1
2

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