Задача 31591.

The circuit diagram is shown in the figure, first short key K on the time during which the current in the inductor reaches a maximum possible value, then it is opened. What is the amount of heat provided after this in the resistor R? circuit parameters: E = 10, r = 2 Ohm, R = 20 Ohm, L = 20 mH. The resistance of the inductor is very small.

Detailed solution with a short recording conditions, laws and formulas used in the decision, the withdrawal of the calculation formula and the answer.
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