# A current of 2.4 A passes through an electric lamp with a resistance of 15 ohms.

September 20, 2021 | education

| **A current of 2.4 A passes through an electric lamp with a resistance of 15 ohms. How much heat does it generate in 30 minutes?**

Initial data: R (resistance of an electric lamp) = 15 Ohm; I (lamp current) = 2.4 A; t (time of passage of electric current through the filament of the taken lamp) = 30 min or 1800 s.

The amount of heat that an electric lamp will give off can be calculated using the formula:

Q = I² * R * t.

Let’s perform the calculation:

Q = 2.42 * 15 * 1800 = 155,520 J.

Answer: In 30 minutes. an electric lamp emits 155,520 Joules of heat.

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