How to Calculate the Hot Resistance of a Light Bulb

Question:

How can you calculate the hot resistance of a light bulb rated 55 watts, 120 volts?

Answer:

You can calculate the hot resistance of a light bulb rated 55 watts, 120 volts by using Ohm's Law.

When calculating the hot resistance of a light bulb rated 55 watts, 120 volts, you can use Ohm's Law, which states that V=IR, where V is voltage, I is current, and R is resistance.

First, you need to find the current (I) using the power equation P=VI, where P is power and V is voltage. In this case, the power is 55 watts and the voltage is 120 volts.

So, by rearranging the power equation, you can find I = P/V = 55W/120V ≈ 0.46 amps.

Next, you can find the resistance (R) by rearranging Ohm's Law to R=V/I = 120V/0.46A ≈ 260.87 ohms. Therefore, the hot resistance of the light bulb is approximately 260.87 ohms.