Final answer:
In physics, voltage regulator switching is very fast, typically about 60 cycles per second, also known as 60 hertz (Hz). This fast switching helps prevent radio noise.
Step-by-step explanation:
In physics, voltage regulator switching is very fast, typically about 60 cycles per second, also known as 60 hertz (Hz). This fast switching helps prevent radio noise. For example, in a typical AC power supply, the voltage alternates between positive and negative values 60 times per second.