How would increasing the speed of rotation (S) affect the frequency (F) of the alternator?

Increasing the speed of rotation (S) directly impacts the frequency (F) produced by an alternator. This relationship is rooted in the fundamental operation of electromagnetic induction and the design of the alternator itself.

The frequency of the alternating current generated by an alternator is determined by the formula:

[ F = \frac{N \times S}{120} ]

In this formula, F is the frequency in hertz (Hz), N is the number of poles in the alternator, and S is the speed of rotation in revolutions per minute (RPM). When the speed of rotation (S) is increased, it results in a proportional increase in the frequency (F) generated. More rotations lead to more cycles of alternating current produced in a given time frame, hence raising the frequency.

As a result, understanding this relationship is crucial for managing loads and ensuring that electrical systems operate at the desired frequency for efficient performance. Therefore, an increase in the speed of rotation leads directly to an increase in the frequency output of the alternator, confirming that the correct answer is indeed to increase the frequency.