如图所示,电源电动势E=10V,内阻r=0.5Ω,“8V,16W”的灯泡恰好能正常发光,电动机M绕组的电阻R0=1Ω,求:                                                                                                                             

(1)灯泡的电流I1;                                                                                                 

(2)电源的总电流I;                                                                                              

(3)电动机的总功率P1;                                                                                         

(4)电动机的热功率P2和电动机的机械功率P3.                                                     

                                                                                         

                                                                                                                                  

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