Question

if a lightbulb is too dim, what is the most likely cause?
select one:
○ a. circuit voltage too high
○ b. circuit resistance too low
○ c. circuit amperage too high
○ d. circuit resistance too high

Explanation:

Using Ohm's Law ($I = \frac{V}{R}$) and power formula ($P = VI$), a higher resistance ($R$) in the circuit (with constant voltage $V$) reduces current ($I$) and power ($P$) to the bulb. Lower power means less brightness, so high resistance dims the bulb. Options a (high voltage) and c (high amperage) would increase power/brightness, and b (low resistance) also increases current/power.

Answer:

d. Circuit resistance too high