A certain switch is described as a single-pole, dou- ble-throw switch (SPDT).The throw of a switch indicates the number of
发布于 2021-02-18 21:53:48
【单选题】 A circuits each pole can complete through the switch. B terminals at which current can enter or leave the switch. C places at which the operating device (toggle, plunger, etc.) will come to rest and at the same time open or close a circuit.
