开路又叫断路,是指电路在某处断开。在家中我们有时会遇到闭合开关后电灯不亮、电扇不转等情况,它属于电路故障的范畴。开路故障有的较为隐蔽,有时难以查找,主要出现在接触处或接头处,通称为接触不良。家中如果出现用电器不工作的情况首先要检查的就是保险丝是否熔断,这是故障查找的第一步;其次要检查接触处,如换一个插座、插头试试 Open circuit, also known as open circuit, means that the circuit is disconnected somewhere. At home, we sometimes encounter situations in which the lamp does not turn on after the switch is closed and the fan does not turn. It belongs to the category of circuit faults. Some open circuit faults are more subtle, sometimes difficult to find, mainly in the contact or joints, known as poor contact. If the home does not work with electrical appliances, the first thing to check is whether the fuse is blown, which is the first step in troubleshooting; second, check the contact, such as changing a socket, plug try