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Electrical Machines

Electrical Machines
From no load to full load the slip will

 slightly decrease.
 not change.
None of these
 slightly increase.

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Electrical Machines
A shunt generator is running at 1000 rpm. If flux is reduced by half, then what is the new speed?

 0.
 500.
 1000.
 2000.

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Electrical Machines
Armature reaction in dc motor results

  decrease in speed.
  open circuit.
  increase in speed.
  short circuit.

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Electrical Machines
Eddy current loss will depends on

 Thickness
 Flux density
All of these
 Frequency

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

 1/V²
 V²
 1/V
 supply voltage V

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Electrical Machines
Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. What is the operating frequency, if the load is 600 MW?

 50 Hz
 45 HZ
 48 Hz
 48.5 Hz

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