普通晶闸管导通的条件是什么?导通后要怎样才能使其重新关断?
①导通的条件:在阳极和阴极间加上正向电压的同时,在门极和阴极间加适当的正向触发脉冲信号电压。②关断的条件:必须使阳极电流减小到低于其维持电流。断开阳极电路或使阳极电压反向。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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