Initial data: I (current strength) = 0.5 A; t (running time of electric current) = 8 h; A (work done by electric current) = 1728 kJ = 1728 * 10 ^ 3 J.
SI system: t = 8 h = 8 * 3600 s = 28800 s.
The resistance can be determined from the following formula (Joule-Lenz law): A = I ^ 2 * R * t, whence R = A / (I ^ 2 * t).
Let’s perform the calculation: R = 1728 * 10 ^ 3 / (0.5 ^ 2 * 28800) = 240 Ohms.
Answer: The resistance is 240 ohms.
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