题目内容


如图所示,直线a为某电源的路端电压随干路电流强度的变化图线,直线b为某一电阻R两端的电压随电流变化图线,把该电源和该电阻组成的闭合电路,电源的输出功率和电源的内电阻分别为(    )       

                                                                                          

    A. 4W,0.5Ω B.                         6W,1Ω                 C. 4W,1Ω D. 2W,0.5Ω

                                                                                                                                 

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