電流定律這一章的主要内容在闡述電學中幾個最基本的概念——電量、電流强度、電阻、電壓、電功和電功率等及其間相互依存的關係,使學生對電學的理論有一初步的系統的認識,為以後的學習奠定穩固的基礎。一般说来,電学中的這些概念,對於初中學生而言,是比较抽象的,因此,在讲述這些概念時,就必須儘可能通過演示实驗或日常習知的事實,引導學生對現象進行觀察和分析,然後加以適當的概括,使學生能從具體的印象中,很自然地建立起這許多概念來渲须妷哼@一概念,學生會感到更難理解,尤須着重加以闡明,使能初步正確地了解電壓的物理意義;必須使学生知道電壓 The main content of this chapter is to explain the basic concepts of electricity - electricity, current strength, resistance, voltage, electrical and electrical power and their interdependence, so that students have a preliminary theory of electricity Systematic understanding, lay a solid foundation for future learning. In general, these concepts in electricity are more abstract for junior high school students. Therefore, in describing these concepts, students must be guided to observe the phenomenon as much as possible through demonstration experiments or daily learned facts And analysis, and then appropriate summary, so that students can from a specific impression, it is natural to build up many of these concepts to show that a concept, the students will feel more difficult to understand, with particular emphasis on clarification, to enable A preliminary, accurate understanding of the physical meaning of the voltage; the student must be made aware of the voltage