【多选题】在使用设备时,如果发现设备工作异常,错误的做法是
【简答题】对称三相电路是()。 A三相电源对称的电路 B三相负载相同的电路 C三相电源对称或负载相同的电路 D三相电源对称和负载相同的电路
【简答题】已知电路电源电动势为E,当电路负载开路时,负载中电流I=___________,负载两端电压U=_______。
【单选题】在电源给负载电阻R供电电路中,负载增加是指[ ]。
【简答题】如图所示电路中,电源电动势E=120V,内电阻Rs=0.3Ω,连接导线电阻Rw=0.2Ω,负载电阻RL=11.5Ω。求: (1)通路时的电流、负载和电源的电压,负载消耗的电功率、电源产生和输出的电功率; (2)开路时电源电压和负载电压; (3)负载端和电源端短路时电源的电流和电压。
【单选题】The following extract of information is available concerning the four cost centres of EG Limited. Production cost centres Service cost centre Machinery Finishing Packing Canteen Number of direct ...
【单选题】The number of tickets available will be ______ by the size of the stadium.
【单选题】The following extract of information is available concerning the four cost centres of EG Limited. Production cost centres Service cost Centre Machinery Finishing Packing Canteen Number of direct emplo...