Electricity

UNIT 5

ELECTRICITY

Learning Objectives

After the completion of this lesson, students will be able to:

* know about the basic properties of electric charges.

* explain the transfer of charges between two objects.

* understand the working of electroscope.

* recognise the effects of electric current.

* assemble different electric circuits.

* list out the applications of electricity.

Introduction

All things we use in our life are made up of elements. Each element is made up of atoms which is the smallest unit. John Dalton, the scientist considered that atoms cannot be divided further. But, it was found out later through Rutherford’s gold foil experiment that atoms are made up of particles like proton, electron and neutron. Movement of electrons in a material constitutes electric current and generates an energy called electric energy or electricity. We use this energy in our life for various needs. Electric bulbs, fans, elctric iron box, washing machines and refrigirators are some of the appliances which work with the help of electricity. In this lesson we will study about electric charges and how they are transferred. This lesson will also cover electric circuits and the effects of electric current.