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Electrical Machines

Electrical Machines
Reactive power generated or delivered significantly depends on

 both 1 and 2.
 load angle.
 frequency.
 excitation.

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Electrical Machines
A 4 pole 50 Hz induction motor is running at 1470 rpm. What is the slip value?

 0.2
 0.04
 0.4
 0.02

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Electrical Machines
A single-phase transformer has its maximum efficiency at 60 percent of full load. At full load copper loss will be

 less than core loss.
  more than core loss.
 equal to core loss.
 zero.

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Electrical Machines
A 4 pole 50 Hz induction motor is running at 1470 rpm. Find the speed of stator magnetic field with respect to rotor?

 1470 rpm
 1500 rpm
 30 rpm
 zero

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Electrical Machines
If a shunt generator delivers 100 A at 200 V, and the resistances of the shunt field and armature are 100 ohms and 0.01 ohms respectively, the generator emf will be

  any one of the connection.
  parallel.
  no resistance is connected.
  series.

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Electrical Machines
In a single phase induction motor, the starting torque developed is proportional to

 1/V
 supply voltage V
 1/V²
 V²

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MORE MCQ ON Electrical Machines

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