Final answer:
The resistance of the small bulb rated at 7.5 W when operated at 125 V is 2083.33 ohms.
Step-by-step explanation:
The resistance of a small bulb can be calculated using Ohm's Law, which is derived from the power equation P = V^2/R, where P is power, V is voltage, and R is resistance. Given that the bulb is rated at 7.5 W when operated at 125 V, we can rearrange Ohm's Law to solve for R: R = V^2/P.which states that resistance is equal to voltage divided by current. Substituting the known values gives us R = 125^2 / 7.5. By calculating this, we find that the resistance of the bulb is 2083.33 ohms.