Final answer:
The relationship between electrical frequency and magnetic field speed in an AC machine can be explained through Faraday's Law of Induction, which states that the induced emf is directly proportional to the rate of change of magnetic flux with respect to distance.
Step-by-step explanation:
The relationship between electrical frequency and magnetic field speed for an AC machine can be understood through Faraday's Law of Induction. According to this law, the induced electromotive force (emf) in a wire is directly proportional to the rate of change of magnetic flux with respect to distance.
In an AC machine, the speed of the magnetic field is determined by the rotation speed of the coils. As the frequency of rotation increases, the rate of change of magnetic flux also increases. This results in a higher induced emf.