What is the important factor in the frequency formula involving generators?

The frequency formula for generators directly relates to the number of poles in the generator. The frequency of the electrical output is determined by the formula:

[

\text{Frequency (Hz)} = \frac{\text{Number of Poles} \times \text{RPM}}{120}

]

In this formula, increasing the number of poles will have a direct impact on the frequency produced by the generator. Generally, a generator with more poles can produce more cycles per minute, allowing for higher frequencies at a given speed compared to generators with fewer poles.

While the number of turns in the wire can influence the voltage output and efficiency, it does not directly affect the frequency. The diameter of the rotor and the voltage output also have their own significance in terms of performance but do not play a key role in determining the frequency of the generated electricity. Therefore, the number of poles in the generator is indeed the crucial factor in the frequency formula, making it the correct answer.