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Electrical Machines
Maximum power developed by a synchronous motor depends on
supply voltage, load angle and excitation
supply voltage and excitation
supply voltage and load angle
excitation and load angle
supply voltage, load angle and excitation
supply voltage and excitation
supply voltage and load angle
excitation and load angle
Answer
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Related Question
Electrical Machines
Which of the following windings are necessary in case of all dc machines?
closed winding
wave winding
open type winding
lap winding
closed winding
wave winding
open type winding
lap winding
Answer
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Electrical Machines
Consider the following statements regarding the magnetization characteristics of a dc generator : 1. It represents the variation of field flux with field current. 2. Variation of open-circuit terminal voltage with field current is independent of speed 3. It is non-linear from zero to rated field current 4. It helps to determine the critical field resistance at a given speed 5. It always starts from the origin Which of these statements are correct ?
3 and 5
1, 2 and 5
2, 3 and 4
1 and 4
3 and 5
1, 2 and 5
2, 3 and 4
1 and 4
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°.
24°.
45°.
30°.
10°.
24°.
45°.
30°.
Answer
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Electrical Machines
The material used for commutator brushes is mostly
copper.
carbon.
cast iron.
mica.
copper.
carbon.
cast iron.
mica.
Answer
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Electrical Machines
Wave winding is prefered for which of the following rating?
high current and high voltage
low current and low voltage
low current and high voltage
high current and low voltage
high current and high voltage
low current and low voltage
low current and high voltage
high current and low voltage
Answer
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