Electric lamps have the same resistance. One of them is rated at 110V, and the other at 220V.
| May 6, 2021 | education
Electric lamps have the same resistance. One of them is rated at 110V, and the other at 220V. In which of the lamps the high power is emitted.
As we know from the current school physics curriculum, power can be calculated through the ratio of the square of the voltage to the resistance.
Since, according to the setting condition, the resistance in the first and second cases is the same, it is possible to neglect it and determine where the power is large only from the voltage value:
110> 220;
110 ^ 2> 220 ^ 2.
Accordingly, more power will be available when the light bulb is rated at 220 V.
Answer: The power is higher at a voltage of 220 V.
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