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我们都知道,当外电路是纯电阻电路,且电源电动势E和内阻r一定时,电源输出最大功率的条件是R=r,其推导过程如下:
We all know that when the external circuit is a purely resistive circuit, and the power electromotive force E and internal resistance r is constant, the power output maximum power condition is R = r, the derivation process is as follows: