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ELECTRICAL MACHINES

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

 4 ang 1
 2 and 1
 2 and 2
 4 and 2

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

None of these
 AC and DC
 AC
 DC

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Electrical Machines
Commutator in DC generator is used for

 convert AC armature current in to DC
 collecting of current
 increase efficiency
 reduce losses

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Electrical Machines
A DC generator without commutator is a

 induction motor
 AC generator
 DC generator
 DC motor

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Electrical Machines
In DC machine yoke offers

 mechanical protection to the machine
 flux path completion
 produce working flux
 both A and B

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