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Electrical Machines
Which of the following voltage regulation method is accurate ?
MMf method
ZPF method
Synchronous impedance method
American standard association method
MMf method
ZPF method
Synchronous impedance method
American standard association method
Answer
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Related Question
Electrical Machines
When maximum flux density is constant, the eddy current losses are proportional to
f
f2
V2
V
f
f2
V2
V
Answer
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Electrical Machines
An alternator is feeding an infinite busbar. Its prime mover is suddenly shutdown. The alternator will
start working as induction motor.
come to stand still.
continue to work as alternator but the direction of rotation will reverse.
continue to work as synchronous motor with same direction of rotation.
start working as induction motor.
come to stand still.
continue to work as alternator but the direction of rotation will reverse.
continue to work as synchronous motor with same direction of rotation.
Answer
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Electrical Machines
Which of the following DC Motor is used in paper machines?
Separately excited DC motor.
DC Shunt motor.
DC compound motor.
DC series motor.
Separately excited DC motor.
DC Shunt motor.
DC compound motor.
DC series motor.
Answer
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Electrical Machines
What will be the e.m.f. generated by a 4 pole lap connected DC Generator rotating at 1500 r.p.m.? Its flux per pole is 0.4 mWb and total no of armature conductors is 1000.
10 volts.
20 volts.
30 volts.
40 volts.
10 volts.
20 volts.
30 volts.
40 volts.
Answer
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Electrical Machines
In electric locomotives which of the following motor are used ?
DC compound motor.
DC series motor.
Synchronous motor.
DC Shunt motor.
DC compound motor.
DC series motor.
Synchronous motor.
DC Shunt motor.
Answer
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