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Electrical Machines

Electrical Machines
The induction motor shaft is made of

  stainless steel.
  mild steel.
  cast iron.
  aluminium.

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Electrical Machines
In salient pole synchronous machine, if direct axis reactance and quadrature axis reactance is equal, then power developed due to reluctance is

 maximum
 any of the above
 zero
 infinite value

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Electrical Machines
If a DC Series motor is connected across an AC supply it will

 not run.
 run at lower speed.
 burn.
 run at normal speed.

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Electrical Machines
In a synchronous machine, if φ is the flux per pole and f is the frequency of the emf induced E then

 E ∝ f/φ
 E ∝ 1/(φf)
 E ∝ φ/f
 E ∝ φf

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Electrical Machines
Which type of bearing is provided in small induction motors to support the rotor shaft?

  Bush bearings.
None of these
  Cast iron bearings.
  Ball bearings.

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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 thick
 large and thin

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