Question

An unknown number (greater than two) of light bulbs are connected in series, and then the combination is connected across the terminals of a battery. Each connecting wire has zero resistance. The resistances of the light bulbs are also unknown, and they are not necessarily all the same. What happens to the brightnesses of the remaining light bulbs when one of the light bulbs is chosen at random, removed from the circuit, and replaced with a wire of zero resistance? Multiple Choice

a. They decrease.
b. Some increase and others decrease depending on the resistances of the light bulbs.
c. They stay the same.

Answer 1

The brightness's of the remaining light bulbs stay the same when one of the light bulbs is removed from the circuit and replaced with a wire of zero resistance in a series circuit.

Step-by-step explanation:

When light bulbs are connected in series and one of them is chosen at random, removed from the circuit, and replaced with a wire of zero resistance, the brightness's of the remaining light bulbs remain the same.

In a series circuit, the same current flows through each component. Therefore, removing a light bulb and replacing it with a wire of zero resistance does not change the current or voltage in the circuit. As a result, the brightness of the remaining light bulbs does not change.