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To reduce the peripheral speed of an alternator, diameter of the rotor is:
  • a)
    Increased
  • b)
    Decreased
  • c)
    Increased or decreased
  • d)
    Kept same
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
To reduce the peripheral speed of an alternator, diameter of the rotor...
Peripheral speed refers to the speed on the periphery or the circumference of the rotor. The peripheral speed is given by the product of the circumference and the speed.
Ps = π × D × RPM
The peripheral speed is dependent on the speed as well as the diameter of the rotor.
Hence to reduce the peripheral speed of an alternator, we need to reduce the diameter of the rotor and increase the axial length.
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Most Upvoted Answer
To reduce the peripheral speed of an alternator, diameter of the rotor...
Reducing Peripheral Speed of an Alternator

Introduction:
An alternator is a machine that converts mechanical energy into electrical energy. The alternator consists of two basic parts, the stator, and the rotor. The rotor is the rotating part of the alternator, and the stator is the stationary part. The speed of the rotor determines the output frequency of the alternator. The peripheral speed of the rotor is directly proportional to the output frequency of the alternator.

Reducing the Peripheral Speed of an Alternator:
To reduce the peripheral speed of an alternator, the diameter of the rotor is decreased. This is done by increasing the number of rotor slots. Increasing the number of rotor slots reduces the diameter of the rotor. This, in turn, reduces the peripheral speed of the rotor.

Effect of Reducing the Peripheral Speed:
Reducing the peripheral speed of the rotor has the following effects:

1. Decreased Output Frequency: As mentioned earlier, the output frequency of the alternator is directly proportional to the peripheral speed of the rotor. Therefore, reducing the peripheral speed of the rotor results in a decrease in the output frequency of the alternator.

2. Increased Torque: Reducing the peripheral speed of the rotor results in an increase in the torque required to rotate the rotor. This is because the force required to rotate the rotor is directly proportional to the peripheral speed of the rotor.

Conclusion:
In conclusion, reducing the peripheral speed of an alternator is done by decreasing the diameter of the rotor. This results in a decrease in the output frequency of the alternator and an increase in the torque required to rotate the rotor.
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To reduce the peripheral speed of an alternator, diameter of the rotor is:a)Increasedb)Decreasedc)Increased or decreasedd)Kept sameCorrect answer is option 'B'. Can you explain this answer?
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