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Electrical Machines
What is/are the necessary conditions for voltage build up in self excited generator?
All of these
Field winding resistance should be less than critical resistance.
Poles should contain residual flux.
Field winding should be properly connected to armature winding.
All of these
Field winding resistance should be less than critical resistance.
Poles should contain residual flux.
Field winding should be properly connected to armature winding.
Answer
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Related Question
Electrical Machines
A synchronous motor will deliver maximum power when
input power factor is unity.
load angle is equal to internal angle θ.
load angle is 0°.
load angle is 45°.
input power factor is unity.
load angle is equal to internal angle θ.
load angle is 0°.
load angle is 45°.
Answer
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Electrical Machines
Eddy current loss will depends on
Flux density
Thickness
Frequency
All of these
Flux density
Thickness
Frequency
All of these
Answer
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Electrical Machines
If in DC Shunt Motor the flux is reduced suddenly to zero, then
the motor will attain dangerously high speed.
the motor will come to stop.
the armature current will reduce.
the speed of motor will be reduced.
the motor will attain dangerously high speed.
the motor will come to stop.
the armature current will reduce.
the speed of motor will be reduced.
Answer
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Electrical Machines
In the V curve shown in figure below for a synchronous motor, the parameter of Y and X coordinates are, respectively
Torque and field current.
Armature current and field current.
Armature current and torque.
Power factor and field current.
Torque and field current.
Armature current and field current.
Armature current and torque.
Power factor and field current.
Answer
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Electrical Machines
Total core loss is also called as -------------?
Eddy current loss
Copper loss
Hysteresis loss
Magnetic loss
Eddy current loss
Copper loss
Hysteresis loss
Magnetic loss
Answer
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