Consider a circuit containing five identical light bulbs, an ideal battery, and a switch, as shown below. Assume that the resistance of each light bulb remains constant.
a) First, close the switch. Rank the bulbs (A through E) based on their brightness. Please be sure to explain your reasoning.
b) Now consider what happens when the switch is opened. What happens to the brightness of bulb A? What happens to bulb C? Please be sure to explain why.