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Electrical Machines
A 3-phase, 50Hz, 4 pole induction motor is running at 1440 rpm and rotor input power is 2KW. Find the rotor output power?
1920W
2000W
1820W
1450W
1920W
2000W
1820W
1450W
Answer
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Related Question
Electrical Machines
The mechanical power is developed by a DC motor is maximum when
none of above.
back emf is equal to half of applied voltage.
back emf is equal to applied voltage.
back emf is equal to twice of applied voltage.
none of above.
back emf is equal to half of applied voltage.
back emf is equal to applied voltage.
back emf is equal to twice of applied voltage.
Answer
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Electrical Machines
In an induction motor, what is the ratio of rotor input to rotor copper loss?
1/S
1-S
1/(1-S)
S
1/S
1-S
1/(1-S)
S
Answer
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Electrical Machines
A compound motor has
tertiary winding.
only shunt field winding.
only series field winding.
both shunt and series field winding.
tertiary winding.
only shunt field winding.
only series field winding.
both shunt and series field winding.
Answer
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Electrical Machines
The principle of operation of a 3 - Φ induction motor is almost similar to that of
transformer with secondary short circuited.
synchronous motor.
capacitor start induction motor.
repulsion start induction motor.
transformer with secondary short circuited.
synchronous motor.
capacitor start induction motor.
repulsion start induction motor.
Answer
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Electrical Machines
In shunt dc motor the direction of rotation of the motor will reversed. When
only armature terminals are reversed.
only field terminals are changed.
either field terminals are reversed or armature terminals are reversed.
none of above.
only armature terminals are reversed.
only field terminals are changed.
either field terminals are reversed or armature terminals are reversed.
none of above.
Answer
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