Power of Electrical Energy

Energy is like money, it is used because it can be changed into so many different forms. In our everyday life we make use of many appliances which convert one form of energy into another form. Some examples of energy converters which make our life more comfortable are: Electric motor, Electric generator, Electric iron, Electric bulb, Radio, Steam engine, Car engine, cell, Gas stove, Solar water heater and solar cell.

Electric Motor: Electric energy spins the motor in various electrical appliances which do various types of work for us. For example, electric energy spins the motor in a fan, causing fan to turn cool our room. A motor converts electric energy into mechanical energy. Electric motor is used in electric fans, washing machines, refrigerators, mixers and grinders, hair dryers and many other appliances. A generator is the reverse case of an electric motor. It converts mechanical energy into electrical energy.

Electric Bulb: An Electric bulb converts electrical energy into light energy. Electrical energy causes the filaments in the bulb to become white-hot and give out light. So, in an electric bulb, electrical energy is first converted into heat energy and then light energy.

Radios: A radios coverts electrical energy into sound energy. In a radio set, electrical energy causes the diaphragm in the speaker to vibrate and produce sound. So, a radio converts electrical energy into kinetic energy and then sound energy.

Car Engine: A car burns fuel to get energy and drive its engine. The car engine converts the chemical energy of petrol into heat energy and then kinetic energy.

Gas Stove: When cooking gas is burnt in a gas stove, then mainly heat energy is produced. So, a gas converts the chemical energy of cooking gas into the heat energy.

Solar Water Heater: A solar water heater traps sun’s light and produce heat. So, a solar heater converts light energy into heat energy.

Solar cells: A solar cell traps sun’s light and produce electricity. So, a solar cell converts light energy into electrical energy.

Cell or Battery: A cell contains chemical and supplies electrical energy required to run various types of appliances. So, a cell converts chemical energy into electrical energy.

Electric Iron: When we switch on an electric iron, it becomes hot. So, an electrical iron converts electrical energy into heat energy. An electric heater also converts electrical energy mainly into heat energy.