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Electrical Machines

Electrical Machines
Slip rings of an induction motors are made of

  phosphor bronze.
  carbon.
  aluminium.
  stainless steel.

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Electrical Machines
The output indicate on the name plate of any motor is always the

 Power drawn in KW.
  Output power at the shaft.
 Gross power.
 Power drawn in KVA.

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Electrical Machines
What type of connection is made in between the inter-pole and the field winding?

 Compound.
 Parallel.
 None of the options.
  Series.

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

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

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Electrical Machines
A flat compound generator is obtained from compound generator by connecting a variable resistor

 in parallel with the shunt field
 in series with the series field
 in parallel with the series field
 in series with the shunt field

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Electrical Machines
In a dc machine 6 pole wave winding is used. The number of parallel paths are?

 2
 4
 6
 1

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