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Electrical Machines

Electrical Machines
Which of the following is the largest conversion device?

 DC machine
 Induction machine
All of these
 Synchronous machine

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

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

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Electrical Machines
For high current and low voltage rating which winding is employed to DC machine?

 Wave winding.
 No wave and lap winding.
 Lap winding.
 Both wave and lap winding.

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Electrical Machines
If direct axis reactance Xd and quadrature axis reactance Xq are equal, then reluctance power is

 minimum
All of these
 maximum
 zero

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Electrical Machines
The emf induced in the dc generator armature winding is

 AC and DC
 AC
 DC
None of these

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Electrical Machines
In above questions, find the power delivered by each of the alternators to a load of impedance 6Ω(resistive)

 1000 W, 5040 W.
  3190 W, 5040 W.
 6000 W, 7000 W.
 100 W, 2000 W.

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