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Electrical Machines

Electrical Machines
Commutator pitches of duplex and simplex lap windings are respectively

 2 and 2
 2 and 1
 4 and 2
 4 ang 1

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Electrical Machines
Maximum power developed depends on

 voltage
 reactance
 load angle
 both 1and 2

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

 AC and DC
 DC
None of these
 AC

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Electrical Machines
Which of the following induction motor has the highest starting torque?

 Slip ring induction motor.
None of these
 Squirrel cage induction motor.
 Same in both induction motors.

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Electrical Machines
A 220 V DC machine has an armature resistance 1Ω. If the full load current is 20 A, the difference of induced voltage and generator is

  40 V.
 20 V.
 60 V.
 0 V.

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Electrical Machines
Fifth harmonic component of the induced voltage in three phase AC generator can be eliminated by using a winding pitch of

  4 / 5.
 2 / 3.
 5 / 6.
 6 / 7.

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