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SSC JE Electrical 2019 with solution SET-2

SSC JE Electrical 2019 with solution SET-2
Under no-load conditions in transmission lines, the receiving end voltage is greater than the sending end voltage. This effect is called

Corona effect
Proximity effect
Ferranti effect
Skin effect

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SSC JE Electrical 2019 with solution SET-2
Which of the following power plants employs the Rankine cycle?

Hydro-electric power plant
Thermal power plant
Solar power plant
Nuclear power plant

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SSC JE Electrical 2019 with solution SET-2
In electric traction, the specific energy consumption is measured in

Watt-hour/RPM
Watt-hour/ ton-km
RPM/watt-hour
Ton-km watt-hour

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SSC JE Electrical 2019 with solution SET-2
A _______ works on the principle of dynamically induced EMF?

Transformer
Motor
Choke
Generator

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SSC JE Electrical 2019 with solution SET-2
In an alternator, if α = 60°, then find the pitch factor?

1/2
1
√3/2
0

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The factor by which, the induced E.M.F gets reduced due to short pitching is called pitch factor or coil span factor denoted by Kc. It is given as
Kc = cosα/2
given
α = 60°
Kc = cos60/2
Kc = cos30°
Kc = √3/2

SSC JE Electrical 2019 with solution SET-2
Two coils are said to be ‘magnetically isolated’ provided the coefficient of coupling K

Is less than or equal to one
Is equal to one
Is less than one
Is equal to zero

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When there is no mutual flux between two coils, they are said to be magnetically isolated. In this case. k = 0 and M = 0.

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