Electricity completely surrounds us -- For most of us, modern life would be impossible without it. Here are just a few examples:
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- Throughout your house, you probably find electrical outlets where you can plug in all sorts of electrical appliances.
- Most portable devices contain batteries, which produce varying amounts of electricity depending on their size.
- During a thunderstorm, there are huge bolts of electricity called lightning that shoot down from the sky.
- On a much smaller scale, you can get a shock from static electricity on dry winter days.
- It is easy to create electricity from sunlight using a solar cell; or you can create electricity from the chemical energy in hydrogen and oxygen using a fuel cell.
So what is this mysterious stuff that we call electricity? Where does it come from, and why is it able to do so many different things?
The electricity that we get from power outlets and batteries can power all different kinds of devices. The fact is that electricity can be used in a thousand different ways. For example:
- Electric motors turn electricity into motion.
- Light bulbs, fluorescent lamps and LEDs turn electricity into light.
- Computers turn electricity into information.
- Telephones turn electricity into communication.
- TVs turn electricity into moving pictures.
- Speakers turn electricity into sound waves.
- Stun guns turn electricity into pain.
- Toasters, hair dryers and space heaters turn electricity into heat.
- Radios turn electricity into electromagnetic waves that can travel millions of miles.
- X-ray machines turn electricity into X-rays.
Let's find out what's going on behind the power of electricity.
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