Electric Charges And Fields

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Fractional electricity:- If a glass rod is rubbed with a silk cloth or a fountain-pen with a coat- sleeve, it is able to attract small pieces of paper, straw, lint, light feathers, etc. Similarly, a plastic comb passed through dry hair can attract such light objects. In all these examples, we can say that the rubbed substance has become electrified or electrically charged. It is because of friction that the substance gets charged on rubbing.
The property of rubbed substance due to which they attract the light object is called electricity. The electricity developed by rubbing or friction is called frictional or static electricity. The rubbed substance which shows this property of attraction are said to have become electrified or electrically charged
Electrostatic:-The branch of physics which deals with the study of electric force electric field, Electric potential, and electric energy due to charge are at rest is known as electrostatic. It is also known as static electricity.
Electric charge: - Electric charge is a physics property of matter that causes it to experience a force when placed in electromagnetic fields. Electric charge is a physical quantity which causes electric force in a matter.
It is a scalar quantity. Its SI unit is the coulomb(C). It's dimensional formula [AT-1] or [ M0 L0 T-1 A1]. A proton has a positive charge (+e) and an electron has a negative charge (-e), where
[e= 1.6 Γ— 10-19 coulomb] Two kinds of electric charges:- About 100 years ago, Charles Du fay of France showed that electric charges on various objects are of only two kinds. The following simple experiments prove this fact.
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