The electric iron is designed for a voltage of 220 V. The resistance of its heating element
| September 27, 2021 | education
The electric iron is designed for a voltage of 220 V. The resistance of its heating element is 88 ohms. Determine the energy consumed by the iron for 1800 s, and its power.
1. We determine the power of the iron, having previously transformed the formula, expressing the power through voltage and resistance:
P = U * I = U * (U / R) = U ^ 2 / R = 220 ^ 2/88 = 550 W.
2. Determine the energy that the iron will consume in 1800 seconds:
W = P * t = 550 * 1800 = 990000 J.
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