【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。()
【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。
【单选题】There are 10 different processes running on a workstation. Idle processes are waiting for an input in the input queue. Busy processes are scheduled with the Round-Robin time sharing method. Whic...
【多选题】the sheet metal Processes are .