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Electrical Machines
Value of specific electric loading of Induction motor is in the range of
400 - 4000 ampere conductor / metre.
40 - 400 ampere conductor / metre.
30000 - 100000 ampere conductor / metre.
5000 - 45000 ampere conductor / metre.
400 - 4000 ampere conductor / metre.
40 - 400 ampere conductor / metre.
30000 - 100000 ampere conductor / metre.
5000 - 45000 ampere conductor / metre.
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 ∝ f/φ
E ∝ φf
E ∝ φ/f
E ∝ 1/(φf)
E ∝ f/φ
E ∝ φf
E ∝ φ/f
Answer
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Electrical Machines
Which of following motor is preferred for belt conveyor?
Synchronous motors.
Slip ring induction motor.
Universal motor.
Reluctance motor.
Synchronous motors.
Slip ring induction motor.
Universal motor.
Reluctance motor.
Answer
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Electrical Machines
Hysteresis loss will depends on
f1.6
f³
f²
f
f1.6
f³
f²
f
Answer
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Electrical Machines
A DC shunt machine generates 250 V on open circuit at 1000 RPM. Armature resistance is 0.5 Ω, field resistance 250 Ω. When running as a motor takes 4 A at 250 V. Calculate the efficiency when running as a motor taking 40 A at 250 V. Armature reaction weakens the field by 4%.
78.5%
72.5%
67.5%
82.5%
78.5%
72.5%
67.5%
82.5%
Answer
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Electrical Machines
What is the function of inter pole in DC generator?
To neutralize the distortion of main field flux due to armature reaction.
To get a superior commutation.
Both option B and C.
To serve the economical aspects.
To neutralize the distortion of main field flux due to armature reaction.
To get a superior commutation.
Both option B and C.
To serve the economical aspects.
Answer
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