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
The motor will attain the dangerously high speed
Armature current will drop

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SSC JE Electrical 2018 with solution SET-1
In a synchronous Motor, the damping winding is generally used to

Reduces the eddy current
Prevent hunting and provide starting Torque
Reduces the Noise Level
Provide starting torque

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SSC JE Electrical 2018 with solution SET-1
Determine the magnetic field strength (in A/m) of a material when the intensity of magnetization of the material is 0.084 Amp/m and the magnetic susceptibility of the material is 0.0012

700
0.07
0.7
70

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