User:Aswathi Jyothikumar/sandbox

ELECTRIC CHARGE
Electric charge is an intrinsic property of protons and electrons.There are two types of charges exist,positive and negative.A proton has positive charge and an electron has negative charge.The charges were named as positive and negative by the American scientist Benjamin Franklin.S I unit of charge is Coulomb(C). Magnitude of the charge on the proton exactly equals to the magnitude of the charge on the electron,that is equal to 1.6×10-19C.If an object possesses an electric charge,it is said to be charged.When it has no charge, it is said to be neutral.A simple apparatus to detect charge on a body is the “gold-leaf electroscope”. Following are some of the properties of electric charge: 1.	Like charges repel each other and unlike charges attract each other. 2.	Charge is a scalar quantity. 3.	Charges can be two types positive or negative. 4.	Charge is quantised. q=+ne n=1,2,3… 5.The net electric charge of an isolated system remains constant or we can say that charge is conserved,during any process. To charge a neutral body,we need to add or remove one kind of charge.Electrons can be transferred from one body to another body.A body can thus be charged positively by losing electrons which are less tightly bound in an atom.Similarly a body can be charged negatively by gaining electrons.

ACTIVITY
Rub a scale with your dry hair,and bring near to small pieces of papers.What do you observe? You will observe that some of the papers attracted and stick to the scale.

https://en.wikiversity.org/wiki/File:Charge_on_rubbing,jpg.jpg

•	Here charge is created in the process of rubbing.All material bodies contain equal number of protons and electrons at their normal state.When rubbed against each other,electrons get transferred from one body to another body.So the body which is gaining the electron gets negative charge,the body that donates the electrons becomes positively charged.And we know that opposite charges will attract each other. Electricity so obtained by rubbing two objects is known as Frictional electricity. Some of the pairs of materials which will get charged on rubbing are given below: