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Electrical Machines

Electrical Machines
A 4-pole generator with 16 coil has a two layer lap winding. The pole pitch is

 16.
 8.
 32.
  4.

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Electrical Machines
A DC cumulatively compounded motor delivers rated load torque at rated speed. If the series field is short-circuited, then the armature current and speed will

 both increase
 both decrease
 decrease and increase respectively
 increase and decrease respectively

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Electrical Machines
The use of higher flux density in the transformer design

 has no relation with the weight of transformer
 increases the weigh per KVA
None of these
 reduces the weigh per KVA

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Electrical Machines
Hysteresis loop represents the area of

 total iron losses
 hysteresis loss
 eddy current loss
 copper loss

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Electrical Machines
The core flux in transformer depends mainly on

 supply voltage
 supply voltage and frequency
 supply voltage and load
 supply voltage, frequency and load

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Electrical Machines
In DC machines internal characteristics are plotted between

 Eg vs load current
 Eg vs Ia
 Vt vs Ia
 Vt vs load current

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MORE MCQ ON Electrical Machines

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