Free NCERT Lesson on Electricity for Class 10th 

    In this lesson we will learn about
  • What Is Electricity
  • Ohm’s law
  • What is Resistance
  • Concept of Resistance in Series and Parallel
  • Heating Effect of Electric Current
  • Electric Power 
  • Solved Problems
  • Previously Asked Questions In CBSE Board from Electricity
  • NCERT Solutions On Electricity 

What You Will Learn

The electric current is a flow of electric charges (called electrons) in a conductor such as a metal wire. 

The SI unit of electric current is ampere.

A continuous conducting path consisting of wires and other resistances (like electric bulb, etc.) and a switch, between the two terminals of a cell or a battery along which an electric current flows, is called a circuit.

According to Ohm’s law : At constant temperature, the current flowing through a conductor is directly proportional to the potential difference across its ends.

The electrical resistance of a conductor (or a wire) depends on the following factors :
(i) length of the conductor,
(ii) area of cross-section of the conductor (or thickness of the conductor),
(iii) nature of the material of the conductor, and
(iv) temperature of the conductor.

When an electric current is passed through a high resistance
wire, like nichrome wire, the resistance wire becomes very hot
and produces heat. This is called the heating effect of current.

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