Question

one disadvantage of this type of circuit is that a the addition of new light bulbs decreases resistance. b as more lights are added to the circuit, the voltage to each decreases. c as more lights are added to the circuit, the current to each increases. d when the current to one light is turned on, the current to the other lights turns off.

Explanation:

The circuit shown is a series circuit, where components are connected end-to-end in a single path for current.

1. For option A: Adding resistors (light bulbs) in series increases total resistance, so this is incorrect.
2. For option B: In a series circuit, total voltage from the source is divided among all components. Adding more bulbs means each bulb gets a smaller share of the total voltage, so this is correct.
3. For option C: In a series circuit, current is the same through all components. Adding more bulbs increases total resistance, which decreases the total (and thus each bulb's) current, so this is incorrect.
4. For option D: In a series circuit, all components share the same current path; if one component fails (or is turned off in a way that breaks the circuit), all turn off, but the statement describes the opposite, so this is incorrect.

Answer:

B. as more lights are added to the circuit, the voltage to each decreases.