Static electricity
●Static electricity is produced by friction between two insulating materials. When the materials are rubbed together, electrons are transferred from one material to another , giving rise to a static electricity.
● Insulators like glass , plastic , ebonite etc can be charged by friction.
●Charge developed on the glass rod when it is rubbed with silk as positive and the charge developed on the ebonite rod when it is rubbed with fur as negative.
●Like charges repel each other while unlike charges attract each other.
● Conductors are charged by methods - i) conduction ii) Induction
i) In conduction - the conductor to be charged is touched with charged body. The conductor gets charged by the similar kind of charge as on the changing body
ii) In induction a conductor gets charged in presence of the charged body (without touching) and it gets uncharged on removal of charged body .The end of the conductor near the charged body is oppositely charged while the other far from the charged body is charged by the same kind of charge
● An Electroscope is a device which is used to detect the presence and nature of the charge on a body.
●There are two types of electroscope
- 1. Pith ball Electroscope.
2. Gold leaf electroscope
Here's a video representation:-
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