In case of a double cage induction motor, the inner cage has
A. high inductance arid low resistance
B. low inductance and high resistance
C. low inductance and low resistance
D. high inductance and high resistance
Answer: Option A
This Question Belongs to Electrical Engineering >> Transformers
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The purpose of providing an iron core in a transformer is to
A. provide support to windings
B. reduce hysteresis loss
C. decrease the reluctance of the magnetic path
D. reduce eddy current losses
A good voltage regulation of a transformer means
A. output voltage fluctuation from no load to full load is least
B. output voltage fluctuation with power factor is least
C. difference between primary and secondary voltage is least
D. difference between primary and secondary voltage is maximum
If the percentage impedances of the two transformers working in parallel are different, then
A. transformers will be overheated
B. power factors of both the transformers will be same
C. parallel operation will be not possible
D. parallel operation will still be possible, but the power factors at which the two transformers operate will be different from the power factor of the common load
An ideal transformer will have maximum efficiency at a load such that
A. copper loss = iron loss
B. copper loss < iron loss
C. copper loss > iron loss
D. none of the above
As we know the every induction motor should always have high Inductance property
1 In double cage we are using two cage (inner and outer cage)
Here outer cage have more resistance than ineer cage
2 outer cage is made of brass and aluminum high resistivity and inner cage is off copper low resistivity material.
Therefore double cage induction motor
inner cage should have high inductance and low resistance.
It is a question of induction motor , why this is in transformer section