各种电路都要安装保险丝,物理教学中也都谈到保险丝。笔者就保险丝的问题讲点粗浅看法。一、照明电路装几根保险丝好在安装电路时,大多数情况是在火线和地线上各装一根同规格的保险丝,但也有只在一根火线上装一根保险丝的。初中课本说后一种情况比前一种情况更安全。有人说更安全的原因是装一根保险丝比装两根保险丝更快地切断电路。这种说法有道理吗?装一根保险丝时切断电源所用时间 All kinds of circuits are equipped with fuses, and physics teaching also talks about fuses. The author gives a rough idea on the issue of fuses. First, the lighting circuit is equipped with several fuses Fortunately, when installing the circuit, most of them are installed with a fuse of the same specification on the fire line and the ground line, but there is also only one fuse on a fire line. The junior high school textbook says that the latter situation is more secure than the former. Some people say that the safer reason is that installing a fuse cuts the circuit faster than installing two fuses. Is this statement reasonable? When using a fuse to cut off the power