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Electrical Machines

Electrical Machines
In DC motors, under trailing pole tips, flux density will_______ ?

 decrease
 increase
 either increase or decrease
None of these

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Electrical Machines
No load test of 3-phase induction motor gives which of the following?

 constant loss
 both A and B
 variable loss
None of these

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Electrical Machines
In case of DC shunt motor if load is reduced

 The speed will increase in proportion to reduction in load.
 DC Shunt Motor
  The speed will remains almost constant.
 The speed will increase abruptly.

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Electrical Machines
What is the full form of MNP?

  Magnetic neutral plane.
  Magnetic neutral pole.
  Magnetic field neutral pole.
  Magnetic field neutral plane.

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Electrical Machines
Shunt field of DC generators consists of--------number of turns and ---------- conductors respectively

 less and thick
 less and thin
 large and thin
 large and thick

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Electrical Machines
If the mechanical angle α between the stator and rotor poles increases, then the stator current

  Increases.
 None of above.
 Remains unchanged.
 Decreases.

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