In this topic, you study Electricity – Definition & Types.
Electricity is a kind of energy as heat, light and sound etc. It cannot be seen but its effects can be experienced. Broadly speaking, electricity can be classified into the followings:
- Static electricity.
- Dynamic electricity.
Static Electricity
It is that branch Of science which deals with the phenomenon of electricity at rest. The electricity at rest is defined as the static electricity. It is produced by rubbing two bodies such as glass rod with silk and ebonite rod with cat skin. This type of electricity cannot be transmitted from one place to another, hence it is of no use for current electricity. As basically all the substances in the universe are electrically neutral i.e. having no charge. Now if by any means, the electrons are increased, it means the number of electrons are more than the number of protons and the body is negatively charged. On the other hand if electrons are extracted or taken out then in that particular atom, the number of protons will be more than the number of electrons hence the body is positively charged. These two types of charges are produced:
Negatively charged body: If the glass rod is rubbed with the silk
Positively charged body: Whenever the ebonite rod is rubbed with the cat skin the body is positively charged.
Dynamic Electricity
Electricity in motion is called dynamic electricity. The branch of science which deals with the phenomenon of electricity in motion is known as dynamic electricity. This type of electricity can be transmitted from one place to the another, so it has very much advantages and importance in our daily life. This type of electricity can be produced by the cells, battery, dynamo or generator, alternator etc.