Решение задачи по физике раздел 38 пункт 45 электро

45. The circuit shown in the figure, the thermal power produced in the external circuit, the same for open and closed key K. The internal resistance of the source, if R1 = 12 ohms, R2 = 4 ohms.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)