How Bright is Your Incandescent Lamp?

What is the resistance of an incandescent lamp operated at 120 V with a current of 0.5 A?

The resistance of the incandescent lamp is 240 ohms.

Incandescent lamps are a classic and popular choice for lighting up homes and offices. They produce light by heating a filament wire until it glows white-hot. The amount of light produced by the lamp depends on its resistance, which is determined by the voltage and current passing through it.

In this case, the lamp is operated at 120 volts and has a current of 0.5 amperes. By using Ohm's Law, we can calculate the resistance of the lamp. Ohm's Law states that resistance is equal to the potential difference (voltage) divided by the current:

Resistance = Potential Difference (Voltage) / Current

Plugging in the values we have: Resistance = (120 V) / (0.5 A) = 240 ohms.

So, the resistance of the incandescent lamp is 240 ohms. This means that the lamp will light up with a specific brightness determined by this resistance when operated at 120 V with a current of 0.5 A. Isn't that fascinating?

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