Determine the resistance of a 300W device connected to a 127V network.
| September 6, 2021 | education
Task data: P (power of the used device) = 300 W; U (mains voltage) = 127 V.
To determine the resistance of the device used, we use the formula: P = U ^ 2 / R, whence R = U ^ 2 / P.
Calculation: R = 127 ^ 2/300 = 53.8 Ohms.
Answer: The device used has a resistance of 53.8 ohms.
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