Question

As the speed of an alternator increases:

• A. The frequency remains constant
• B. The frequency decreases
• C. The frequency increases
• D. The power factor decreases

Hint:

For alternators, maintaining the correct speed is crucial for producing the required frequency of AC power.

Answer 1

The Correct Option is C

In an alternator, the frequency is directly proportional to the speed of rotation. As the speed increases, the frequency of the output voltage also increases, according to the formula \(f = \frac{N}{60} \times P\), where \(f\) is the frequency, \(N\) is the speed in RPM, and \(P\) is the number of poles.