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Electrical Machines
Which of the following motor used in hair dryers?
Split phase IM.
Shaded pole IM.
Synchronous motors.
Cage induction motor.
Split phase IM.
Shaded pole IM.
Synchronous motors.
Cage induction motor.
Answer
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Related Question
Electrical Machines
The core flux in transformer depends mainly on
supply voltage and frequency
supply voltage
supply voltage, frequency and load
supply voltage and load
supply voltage and frequency
supply voltage
supply voltage, frequency and load
supply voltage and load
Answer
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Electrical Machines
Why are capacitors used with large AC induction motor?
Improve power level.
Improve voltage level.
Improve current level.
Improve power factor.
Improve power level.
Improve voltage level.
Improve current level.
Improve power factor.
Answer
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Electrical Machines
Which of the following pairs is/are correct?
closed slot----- leakage flux is high
open slot----- leakage flux is less
semi closed slot-----leakage flux is moderate
All of these
closed slot----- leakage flux is high
open slot----- leakage flux is less
semi closed slot-----leakage flux is moderate
All of these
Answer
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Electrical Machines
A cumulatively compounded dc motor delivers rated load power at rated speed. If the series field is short-circuited, then
both armature current Ia and speed ωm increase
Ia increases and ωm decreses
Ia remains constant but ωm increase
both decrese
both armature current Ia and speed ωm increase
Ia increases and ωm decreses
Ia remains constant but ωm increase
both decrese
Answer
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Electrical Machines
If Ke is eddy current constant, Kf is form factor, f is supply frequency, Bm maximum flux density in core of transformer, the expression of eddy current loss in transformer, is given by
Kef2Kf2Bm2.
Kef2Kf2Bm.
Kef2KfBm2.
KefKf2Bm2.
Kef2Kf2Bm2.
Kef2Kf2Bm.
Kef2KfBm2.
KefKf2Bm2.
Answer
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