Question

If a rotor in a power generator completes 3000 rotations in a minute. What is the frequency of the AC produced if the pair of magnetic poles are used in the generator?

• A. 3000 Hz
• B. 300 Hz
• C. 50 Hz
• D. 60 Hz

Answer 1

The correct option is C 50 Hz

Given: Rotations = 3000
Time (t) = 1 min = 60 s
Frequency = $\frac{\text{Rotation}}{\text{Time}}$
= $\frac{3000}{1\times 60}=50$ Hz