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在电学实验中,不可避免会出现电路故障,特别是在一般中学中,由于电学实验器材不足、使用频繁、检修维护不及时,以致在学生分组电学实验过程中,电路故障较多,影响实验课的顺利进行。为此,教师必须重视、研究这个问题。 (一)电路故障及其发生的原因电学实验器材使用一定时间后,往往会产生各种各样的隐患,如内部断线、短路,接线柱锈蚀、松动,滑动接触头接触不良,
In electrical experiments, circuit failures are unavoidable, especially in general secondary schools. Because of the shortage of electrical laboratory equipment, frequent use, and inaccurate maintenance and repair, electrical faults often occur in the course of students’ group electrical experiments, affecting experimental courses. The smooth progress. For this reason, teachers must pay attention to and study this issue. (I) Circuit failures and their causes After the electrical experiment equipment is used for a certain period of time, it often produces various hidden troubles, such as internal disconnection and short circuit, corrosion and loosening of terminal posts, and poor contact of sliding contacts.