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Electrical Machines
What happens if fifth multiples of harmonics is given to induction motor?
It will rotates in reverse direction.
Fail to start.
It will rotates in normal operation.
Either short circuit or open circuit occurs.
It will rotates in reverse direction.
Fail to start.
It will rotates in normal operation.
Either short circuit or open circuit occurs.
Answer
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Related Question
Electrical Machines
In a synchronous machine, if φ is the flux per pole and f is the frequency of the emf induced E then
E ∝ 1/(φf)
E ∝ φ/f
E ∝ φf
E ∝ f/φ
E ∝ 1/(φf)
E ∝ φ/f
E ∝ φf
E ∝ f/φ
Answer
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Electrical Machines
When an electric train is moving down a hill, the DC motor will operate as
DC series generator.
DC series motor.
DC shunt generator.
DC shunt motor.
DC series generator.
DC series motor.
DC shunt generator.
DC shunt motor.
Answer
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Electrical Machines
In a DC compound motor the field regulator is provided to
control the field flux.
limit the armature current.
control the armature flux.
demagnetize the field partially.
control the field flux.
limit the armature current.
control the armature flux.
demagnetize the field partially.
Answer
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Electrical Machines
The voltage regulation of a DC generator at full load being zero implies that the generator is
series connected.
cumulatively compounded.
deferentially compounded.
shunt connected.
series connected.
cumulatively compounded.
deferentially compounded.
shunt connected.
Answer
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Electrical Machines
In a DC machine the armature mmf is
rotating with respect to field poles.
rotating with respect to field poles as well as armature.
stationary with respect to field poles.
stationary with respect to armature.
rotating with respect to field poles.
rotating with respect to field poles as well as armature.
stationary with respect to field poles.
stationary with respect to armature.
Answer
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