SSC JE Electrical 2019 with solution SET-1
 What is the reason behind using a centrifugal switch in a single-phase induction motor?

To improve the starting performance of the motor
To protect the motor from overloading
To cut-off the starting winding at an appropriate instant
To out in the capacitor during running conditions

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SSC JE Electrical 2019 with solution SET-1
 Identify the INCORRECT statement with regards to synchronous motors

The armature winding is placed on the stator
It is a constant speed motor
The field winding is placed on the rotor
It is a self-starting machine

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SSC JE Electrical 2019 with solution SET-1
If the field of the synchronous motor is under excited the power factor will be:

Leading
Lagging
Unity
Zero

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SSC JE Electrical 2019 with solution SET-1
 Two decimal coils A and B of 1000 turns each lies in the parallel plane such that 80% of the flux produced by one coil links with the other. If a current of 5A flowing in A produces a flux of 0.05 mWb, then the flux linking with coil B is:

0.04 mWb
4 mWb
0.004 mWb
0.4 mWb

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