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Electrical Machines
A part an alternator winding consist of eight coils in series, each having an emf of 20 V rms induced in it. Coils are placed in successive slots and between each slot and the next, there is an electrical phase displacement of 30°. Find the emf of eight coils in series
86.91 V.
76.91 V.
56.91 V.
66.91 V.
86.91 V.
76.91 V.
56.91 V.
66.91 V.
Answer
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Related Question
Electrical Machines
The stator core of a 3 - Φ induction motor is laminated in order to reduce the
hysteresis loss.
weight of the stator.
both of the above.
eddy current loss.
hysteresis loss.
weight of the stator.
both of the above.
eddy current loss.
Answer
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Electrical Machines
In DC generators, electric current to the external circuit from armature is given through
solid connection.
none of above.
commutator.
slip rings.
solid connection.
none of above.
commutator.
slip rings.
Answer
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Electrical Machines
In which transformer, the tertiary winding is used?
Delta - delta
Star - star
Delta - star
Star - delta
Delta - delta
Star - star
Delta - star
Star - delta
Answer
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Electrical Machines
A motor armature conductor of length 0.5 m is exposed to a flux density of 4 Wb / m2. Calculate the force experienced by the conductor, when the armature current is 5 Amp?
20 N.
15 N.
None of these.
Can't be determined.
20 N.
15 N.
None of these.
Can't be determined.
Answer
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Electrical Machines
Ratio of starting torque to full load torque is minimum in
Cumulative compound motor.
Series motor.
Differential compound motor.
Shunt motor.
Cumulative compound motor.
Series motor.
Differential compound motor.
Shunt motor.
Answer
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