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Electrical Machines
Drop in speed from no load to full load is very high in
Cummulative compound motor with interpoles.
Shunt motor with interpoles.
Series motor with interpoles.
Series motor without interpoles.
Cummulative compound motor with interpoles.
Shunt motor with interpoles.
Series motor with interpoles.
Series motor without interpoles.
Answer
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Related Question
Electrical Machines
When the mechanical power is developed by a DC motor maximum
None of above.
Back emf is equal.
Back emf is equal to half of applied voltage.
back emf is equal to applied voltage.
None of above.
Back emf is equal.
Back emf is equal to half of applied voltage.
back emf is equal to applied voltage.
Answer
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Electrical Machines
The basic function of a transformer is to change
the power factor
the level of the voltage
the power level
the frequency
the power factor
the level of the voltage
the power level
the frequency
Answer
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Electrical Machines
In escalator which motor is used?
Universal motor.
3 - φ IM.
DC shunt motor.
1 - φ IM.
Universal motor.
3 - φ IM.
DC shunt motor.
1 - φ IM.
Answer
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Electrical Machines
In a step down transformer which one of the following statements is true?
Number of secondary turns is more than that of primary.
Secondary current is less than primary current.
Number of secondary turns is less than primary turns.
Secondary power is less than primary power.
Number of secondary turns is more than that of primary.
Secondary current is less than primary current.
Number of secondary turns is less than primary turns.
Secondary power is less than primary power.
Answer
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Electrical Machines
Due to magnetic saturation, the flux per pole in a DC machine without brush shift
decreases in both generators and the motors with load.
increases in generators but decreases in motor with load.
decreases in generators and increases in motor with load.
increases in both the generators and the motors with load.
decreases in both generators and the motors with load.
increases in generators but decreases in motor with load.
decreases in generators and increases in motor with load.
increases in both the generators and the motors with load.
Answer
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