Final answer:
The question hints at AC circuit principles in high school level Physics, focusing on changes in frequency and current amplitude upon switching a circuit component.
Step-by-step explanation:
The question provided seems to be related to an electrical circuit in a Physics context, particularly focusing on the behavior of a circuit with an inductor or a capacitor connected to an alternating current (AC) source. The switching from position A to B implies a change in the circuit that will affect the frequency and current amplitude. The typical frequency for household AC in the United States is 60 Hz, and the current amplitude varies depending on the components within the circuit and their reactance at the given frequency. For an inductor or capacitor, the reactance and hence the current amplitude will change with frequency. The flickering of lights at 60 Hz is normally imperceptible due to the higher flicker frequency (120 Hz) and the persistence of vision.