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Electrical Machines
Slip rings of an induction motors are made of
aluminium.
phosphor bronze.
carbon.
stainless steel.
aluminium.
phosphor bronze.
carbon.
stainless steel.
Answer
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Related Question
Electrical Machines
Commonly used starters of cage motor is
star delta.
both A and B.
None of these
DOL.
star delta.
both A and B.
None of these
DOL.
Answer
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Electrical Machines
An unexcited single phase synchronous motor is
reluctance motor.
AC series motor.
repulsion motor.
universal motor.
reluctance motor.
AC series motor.
repulsion motor.
universal motor.
Answer
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Electrical Machines
A 220 V DC generator is run at full speed without any excitation. The open circuit voltage will be
220 V.
zero.
about 2 V.
about 50 V.
220 V.
zero.
about 2 V.
about 50 V.
Answer
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Electrical Machines
In dc machines, the space distribution of air-gap flux density wave at no load is
sinusoidal
flat-topped
rectangular
co- sinusoidal
sinusoidal
flat-topped
rectangular
co- sinusoidal
Answer
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Electrical Machines
A 3 stack stepper motor has 12 teeth on stator as well as on rotor. Determine the step size when each stack excited?
10°.
30°.
45°.
24°.
10°.
30°.
45°.
24°.
Answer
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