What energy does an electric stove consume at a current of 6 A in 20 minutes, if the resistance of its spiral is 25 Ohm?

The energy of the tile is equal to the given heat. The given heat is directly proportional to the square of the current strength, resistance and time:
A = I ^ 2 * R * t = 36 * 25 * 120 = 108kJ

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