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ELECTRICAL MACHINES

Electrical Machines
If the field current is reduced to zero the maximum power developed by alternator is

 5.46 KW.
  2.73 KW.
 0.9103 KW.
 1.644 KW.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
If dimension of all the parts of a synchorous generator and the number of field and armature turns are double, then generated voltage will change by a factor of

 1.
 4.
  8.
 2.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Find the synchronous reactance of alternators in which a given field current of 200 A on short circuit and a generated emf of 50 V on open circuit. Armature resistance is 0.1 ohm

 1Ω.
 0.5Ω.
  0.23Ω.
 0.25Ω.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
For the above problem, find the induced voltage of an alternator of it is to deliver a load of 100 A at power factor of 0.8 lagging with terminal voltage of 200 V.

 230 V.
  222 V.
 220 V.
 225 V.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Voltage across the open circuited field termninals of a synchorous machine under slip test is

  DC of slip frequency.
 A modulated supply frequency AC voltage with slip frequency envelop.
 AC of supply frequency.
 DC.

ANSWER DOWNLOAD EXAMIANS APP
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