To reduce the peripheral speed of an alternator, diameter of the

To reduce the peripheral speed of an alternator, diameter of the
| To reduce the peripheral speed of an alternator, diameter of the rotor is:

A. Increased

B. Decreased

C. Increased or decreased

D. Kept same

Please scroll down to see the correct answer and solution guide.

Right Answer is: B

SOLUTION

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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