假期,我们全家去北京游玩。夜晚,迷人的霓虹灯非常漂亮,吸引了许多行人驻足观看,特别是装饰在大楼边缘或者店铺招牌上的小彩灯,有规律地闪烁,还闪出一定的形状和内容,煞是喜人。物理课上我们知道,节日用的小彩灯各灯之间基本上都是串联,因为单个小彩灯的额定电压都较低,如果直接接在家庭电路两端通常要加变压器,而串联就能使每个小彩灯分得的电压降低到较小的值。但是我们也都知道串联电路的特点,其中一个灯坏了就会造成 Holidays, our family went to Beijing to play. At night, the charming neon lights are very beautiful, attracting many pedestrians to stop and watch, especially the small lantern decorated on the edge of the building or shop signs, flashing regularly, and flashing certain shapes and contents. Physics lesson, we know that the festival lights are basically all the lights in series, because a small lantern rated voltage is low, if the direct connection in the home circuit usually have to add transformers, and in series Can make each small lantern share the voltage reduced to a smaller value. But we also know the characteristics of the series circuit, one of the lights will be broken