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Electrical Machines

Electrical Machines
The output power of any electrical motor is taken from the

 Armature.
 Field.
 Coupling mounted on the shaft.
 Motor frame.

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Electrical Machines
Generator works on the principle of production

None of these
 both A and B.
 dynamically induced emf.
 static induced emf.

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Electrical Machines
In case of DC Shunt Motor electromagnetic torque developed is

 Inversely proportional to the armature current.
 Proportional to the square of armature current.
 None of above.
 Proportional to the armature current.

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Electrical Machines
Breadth factor is defined as the ratio of

 both 1 and 2.
 emf with concentrated winding to emf with distributed winding.
 emf with distributed winding to emf with concentrated winding.
None of these

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Electrical Machines
The mechanical power is developed by a DC motor is maximum when

 back emf is equal to applied voltage.
 none of above.
 back emf is equal to twice of applied voltage.
 back emf is equal to half of applied voltage.

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Electrical Machines
which of the following losses are negligible in blocked rotor test?

 both A and B
 copper loss
 mechanical loss
 iron loss

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MORE MCQ ON Electrical Machines

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