SSC JE Electrical 2018 with solution SET-1
 In a P-N junction, the potential barrier is due to the charges on either side of the junction. These charges are

Minority carriers
Both majority as well as minority carriers
Majority carriers
Fixed donor and acceptor ions

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SSC JE Electrical 2018 with solution SET-1
In a split-phase Motor

The centrifugal switch is used to control the supply voltage
The running winding is connected through a centrifugal switch
The starting winding is connected through a centrifugal switch
Both starting and running windings are connected through the centrifugal switch

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SSC JE Electrical 2018 with solution SET-1
 If the field of a DC shunt motor gets opened while the motor is running, then the

Armature will oscillate about original speed as the mean speed
Motor will become slow
Armature current will drop
The motor will attain the dangerously high speed

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SSC JE Electrical 2018 with solution SET-1
 A three-phase synchronous motor will have

Three slip-rings
Two slip-rings
One slip-ring
No slip-rings

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SSC JE Electrical 2018 with solution SET-1
 Determine the maximum flux density (in T) of a material having eddy current coefficient of 2, the thickness of 4 mm, the volume of 20 cu.meter, which is supplied by the frequency of 50 Hz when the material has eddy current loss of 6 W

2.24
1.21
3.34
1.94

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