【单选题】用电动势为E、内阻为r的电源对外电路供电,下列判断中正确的是( ) 1电源短路时,路端电压为零,电路电流达最大值 2外电路断开时,内电路电压为零,路端电压也为零 3路端电压增大时,流过电源的电流一定增大 4路端电压增大时,流过电源的电流一定减小
【简答题】当电源短路时,外电阻可视为零,电源端电压也为零,电流不经过负载,电流回路中仅有很小的电源内阻,因此回路中的电流很大。这个电流称为()。
【多选题】用电动势为 E 、内阻为 r 的电源对外电路供电,下列判断中正确的是 1电源短路时,路端电压为 零,电路电流达最大值 2外电路断开时,电路电压为零,路端电压也为零 3路端电压增大时,流过电源的电流一定减小 4路端电压增大时,电源的效率一定增大
【判断题】电源短路时,外电路的电阻可视为零,电流不再流过负载。()
【单选题】Business processes are collections of
B.
informal practices and behaviors.
C.
formalized and documented practices.
D.
rights and privileges.
【判断题】Biological processes are cleaner and greener than chemical processes.
【单选题】● In which of the following scope management processes are subject matter experts used?
【单选题】Processes are the__________ in which decisions are made and work is performed within any organization.
【单选题】电阻Ro等于有源二端网络中所有电源为零值时的(即电压源短路、电流源开路)( )的等效电阻。
【多选题】the sheet metal Processes are .