Which of the two electric lamps has more electric power: the one that is designed for a voltage of 24 V

univerkov | August 17, 2021 | education

Which of the two electric lamps has more electric power: the one that is designed for a voltage of 24 V and a current of 0.7A or one that is designed for a voltage of 120V and a current of 0.2 A

Task data: U1 (calculated voltage on the first lamp) = 24 V; I1 (current in the first lamp) = 0.7 A; U2 (rated voltage on the second lamp) = 120 V; I2 (current in the second lamp) = 0.2 A.

1) Power of the first lamp: P1 = I1 * U1 = 0.7 * 24 = 16.8 W.

2) Power of the second lamp: P2 = I2 * U2 = 0.2 * 120 = 24 W.

3) Comparison of the wattage of the electric lamps taken: P1 (16.8 W) <P2 (24 W).

Answer: The second electric lamp has more power.

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