Electric stove with a current strength of 5A for 30 minutes. uses 1080kJ of energy. Calculate the resistance of the tiles.
| September 21, 2021 | education
Initial data: I (current in the electric hotplate) = 5 A; t (duration of the electric hotplate) = 30 min (1800 s); Q (the amount of energy consumed by the tile) = 1080 kJ (1080 * 10 ^ 3 J).
The resistance of a given hotplate can be determined using the Joule-Lenz law: Q = I ^ 2 * R * t, whence R = Q / (I ^ 2 * t).
Calculation: R = 1080 * 10 ^ 3 / (5 ^ 2 * 1800) = 24 ohms.
Answer: The resistance of the hotplate is 24 ohms.
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