TEACHING CHAPTER «ELECTRIC RESISTANCE» 8th–CLASS, PHYSICS COURSE

Abstract

This article is aimed at deepening the knowledge of the 8th class physics course on the comparative resistance of conductors by conducting laboratory classes "Determining the comparative resistance of a conductor" when studying the topic "Electrical resistance." The knowledge and qualifications of students on the use of conductors having less comparative resistance in laying new industries, as well as electrical networks are highlighted. In the 8th class textbook "Physics" on the topic "Electrical Resistance," it is well shown that the electrical resistance of a conductor is directly proportional to its length and inversely proportional to the cross-sectional area. It has also been explained that the electrical resistance depends on another constant value in addition to these two values and depends on the conductor material by forming an electrical circuit of conductors of the same length and the same cross-section. The advantage over a given theme. The term "resistance" is used in two different meanings: 1. Resistance characterizes one of the electrical properties of a circuit, network, wire or consumer. In this sense, it can be said that the resistance of the lighting lamp is 110 ohms or the resistance of the wire is 1.0 ohms. 2. A resistor is a device designed to be connected to limit or reduce the current in electrical circuits. An alternating resistor, called a rheostat, is designed to control the current in the circuit. The concept of resistivity is introduced, according to which the resistance of the conductor depends on the material of the conductor in addition to its dimensions. ~ R 