一、与彩灯串相联系的电学问题例1节日里的彩灯串由几十个小灯泡串联而成,使用时直接接入照明电路.其中有一个灯泡构造如图1中a所示,M为双金属片,受热后会向图中左侧弯曲,冷却后还原;其余灯泡构造均如图1中b所示,N为绕在灯丝引出线上被绝缘层包裹着的金属导线,此绝缘层的击穿电 First, the electrical problems associated with the string of lanterns Example 1 The string of lanterns in the holiday season is made up of dozens of small bulbs connected in series. When used, they directly connect to the lighting circuit. One of the bulb structures is shown in Figure 1a. M is a bimetal. After being heated, it will bend to the left in the figure and cool down. The rest of the bulb structure is shown in Figure 1, b, and N is the metal wire wrapped around the filament lead by the insulating layer. Breakdown of insulation