Charging an object by Friction
Charging an object by Friction
Charging an Object: Atoms usually have equal number of positive and negative charges, and are, therefore, electrically neutral. This is the reason why most objects around us are electrically neutral. An electrically neutral object can be charged by using any of the following methods.
Charging by friction: This kind of charging is done by rubbing one material with another. This produces on equal and opposite charge in both the bodies. The most common examples are rubbing glass with silk, and ebonite (a kind of hard rubber) with wool.
Static electricity builds when two different non- metal materials rub together. Rubbing or friction makes the electrons move.This give one material a positive charge and other a negative charge.When glass rod is rubbed with silk, it aquires positive cahrge and by convention silk will aquire some amount of neagative charge. Similarly when plastic rod rubbed with fur it aquires negative sharge, and the fur itself is found to acquire a positive charge. Moreover , if the rod and fur are brought into contact with one another, the charge is found to disappear from both. Similar observations are true for the glass rod and silk cloth.
When a glass rod is rubbed with silk cloth, it acquries positive charge because: | |||
| Right Option : B | |||
| View Explanation | |||
The tremendous electric charges in the atmosphere which produce sheet lightning in the clouds are produced by the process of __________________ | |||
| Right Option : D | |||
| View Explanation | |||
An ebonite rod rubbed with fur and a glass rod rubbed with silk cloth are brought nearer to each other. Then: | |||
| Right Option : A | |||
| View Explanation | |||
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