- Electricity is a form of energy.
- It is very useful to mankind.
- Many of today's appliances such as televisions, computer and lights need electricity in order to work or function.
- The four main sources of electricity are dry cells, accumulators, dynamos and solar cells.
Dry cell contain chemical. When these chemicals react with one another, electricity is produced. A dry cell converts chemical energy to electrical energy.
Accumulators also produce electricity when its chemicals react with one another. However, the electricity produces from an accumulator is greater than the electricity produced by dry cells.
A dynamo consists of a coil of wire that is placed in between magnets. When the coil of wire is spun, electricity is produced. A dynamo converts kinetic energy to electricity energy.
Solar cell consists of thin and flat plates that are sensitive to light. When these plates are exposed to sunlight they start to produce electricity. The solar cells convert light energy to electrical energy.