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多用电表是日常生活中应用比较广泛的电学测量仪器,掌握多用电表的原理和使用方法,对提高学生科学素养具有重要的意义。本节是闭合电路欧姆定律的具体应用,教科书从闭合电路欧姆定律的应用人手,通过例题的方式来讲解欧姆表的原理,旨在提高学生灵活运用知识解决实际问题的能力。在学习欧姆表的基础上,教科书通过“思考与讨论”“说一说”栏目,让学生了解多用电表的基本结构。本文展示笔
Multimeter is widely used in everyday life, electrical measuring instruments, master the principle and use of multimeter, to improve students’ scientific literacy is of great significance. This section is about the application of Ohm’s law of closed circuit. The textbook uses the manpower of Ohm’s law of closed circuit and explains the principle of ohmmeter by way of example to improve students’ abilities of using knowledge to solve practical problems. Based on the study of the ohmmeter, the textbook allows students to understand the basic structure of a multi-meter through the “Think & Discuss” “Tell Me” column. This article shows pen