What work does an electric current in a flashlight bulb perform in 5 minutes if the voltage across the bulb is 3.5V and the current in it is 0.28A?
Task data: t (running time of the electric current) = 5 min; U (voltage value on a flashlight bulb) = 3.5 V; I (light bulb current) = 0.28 A.
SI system: t = 5 min = 300 s.
The work that can be done by the current in a flashlight bulb can be calculated using the formula: A = I * U * t.
Let’s calculate: A = 0.28 * 3.5 * 300 = 294 J.
Answer: In a flashlight bulb, in 5 minutes, the current will do the work of 294 J.
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