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Electrical Machines
In a 3-phase induction motor, torque and supply voltage are related as
T ∝ 1/V
T ∝ 1/V²
T∝ V²
T ∝ V
T ∝ 1/V
T ∝ 1/V²
T∝ V²
T ∝ V
Answer
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Related Question
Electrical Machines
The armature of DC motor is laminated
to reduce the inductor.
to reduce the hysteresis loss.
to reduce the eddy current loss.
to reduce the mass.
to reduce the inductor.
to reduce the hysteresis loss.
to reduce the eddy current loss.
to reduce the mass.
Answer
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Electrical Machines
Which of the following represents the commutator pitch?
Number of conductors spanned by one coil at the back end of the armature.
Number of commutator segments between two successive coils.
The distance between the staring of first coil and its next successive coil
Number of conductors spanned by one coil at the front end of the armature.
Number of conductors spanned by one coil at the back end of the armature.
Number of commutator segments between two successive coils.
The distance between the staring of first coil and its next successive coil
Number of conductors spanned by one coil at the front end of the armature.
Answer
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Electrical Machines
The low voltage winding of a 400/230 V single phase 50 Hz transformer is to be connected to keep the magnetization current at the same level in both the cases the voltage at 25 Hz should be
230 V
460 V
65 V
115 V
230 V
460 V
65 V
115 V
Answer
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Electrical Machines
The slip of an induction motor normally does not depend on
synchronous speed.
rotor speed.
shaft torque.
core loss component.
synchronous speed.
rotor speed.
shaft torque.
core loss component.
Answer
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Electrical Machines
What is the mechanical power developed by a DC series motor is maximum?
Back emf is equal to applied voltage.
Back emf is equal to half the applied voltage.
None of above.
Back emf is equal to zero.
Back emf is equal to applied voltage.
Back emf is equal to half the applied voltage.
None of above.
Back emf is equal to zero.
Answer
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