Energy is the ability to do work, to make something move. Different forms of energy can be used to do work.
Electrical energy is of limited use to us unless we have ways to convert it to beneficial forms of energy. Household appliances are devices that convert electrical energy to useful energy. The electrical energy might have been produced by heat, light, nuclear, chemical, or mechanical energy.
Chemical energy can be used to produce electrical energy by using the wet cell, dry cell, and storage battery. Chemical energy is stored in molecules of matter. Chemical energy is stored energy that is given off when some molecules of matter react with each other. The wet cell, dry cell, and storage battery are examples of stored chemical energy.
Mechanical energy can be changed to electrical energy. This energy is produced through an electric generator. Nearly all the electric energy used today is produced by electric generators. Most of the energy used to operate electric generators comes from turbines. The turbine is turned by mechanical energy. Moving water is an example of mechanical energy. The principles in all generators are the same: there are coils of wire rotating in magnetic fields, and in the electric generator, mechanical energy is changed to electric energy.
Light energy can be used to produce electrical energy by using the photoelectric cell and the solar battery. When light shines on certain materials, an electric current is produced. This is called the PHOTOELECTRIC EFFECT on light energy. An example of this energy is seen when you walk up to a door that is operated by an “electric eye.” The door opens when you cross the beam of light.
Solar cells produce electricity directly from sunlight. Solar cells are made of a material called silicon which, when hit by a ray of light, gives off electrons. As long as light keeps hitting the silicon, an electric current is sent out.
Heat energy can be changed to an electric current by a method called the thermoelectric effect. To create this effect, a thermocouple is used to generate electricity as a result of differences in temperature. This type of energy is used in automobiles. The current produced by this method operates a gauge that shows engine temperature.
Nuclear energy produces electricity when tiny particles of matter are split apart. The heat from this reaction can be used to change water into steam. The steam can then turn turbines to produce electricity.
- similarity of wind energy and nuclear energy
- definition of wind energy wind energy
- solar energy
- energy diagram
- definition of wind energy
- Chemical Energy Information, Definition & Explanation
Many people do not realize that of all the various kinds of energy and power that humanity has created over the past several centuries, chemical energy is the form of energy that is used most often. Chemical energy is in fact a staple in our lives, and we use it every day no matter what
- Hydrogen Power and Fuel Cells
Hydrogen is the simplest element. An atom of hydrogen consists of only one proton and one electron. It’s also the most plentiful element in the universe. Despite its simplicity and abundance, hydrogen doesn’t occur naturally as a gas on the Earth – it’s always combined with other elements. Water, for example, is a combination of
- Energy Conservation, Source of Energy Conservation, Methods of Energy Conservation : Eco India
Energy conservation is the reduction of quantity of energy used. Energy conservation supports the eco friendly lifestyle by providing energy, which saves your money and at the same time saves the earth. When you decrease the amount of energy you use you automatically make efforts to reduce increasing global warming. Source of Energy
- Solar Power HOW IT WORKS. How is Solar Energy used. How do solar panels work.
Discover Solar Power HOW IT WORKS Solar power How it works seems like a mystery to some, but we’ve all seen it used to power everyday things like calculators. It is also used to supply electricity to the appliances and lights we use in our homes. Even utility companies use solar power
- Solar Thermal Energy
So do you want to know about solar thermal energy? I understand how a lot of people are interested in alternative energy. In fact, renewable energy will most probably be one of the main power resources in this century. Solar energy is one of the most effective energy resources; it is already used by a