A little battery puts out a little bit of electricity, so you can use it safely you're your experiments. But the electricity that comes through the wires in your house or school is much more powerful.
Inside the walls where you live or study, there are big wires that carry electricity. When you plug in a light or radio or other electrical appliance, you are putting the light or radio in the path way of the electricity. You have heard adults say, "Don't stick your finger into the wall plug "Now do you know why? Your body is a pretty good conductor of electricity. The electrical current coming through the wires to the wall plug is so strong that it would hurt a lot if you stuck your finger in the plug.
Think: Why should you never put your fingers into the socket(插座) where the light bulb is fixed into a lamp?. Put your finger in there and it could be you, rather than the light bulb, that becomes part of the electrical path way. And that would hurt!
What if you held a piece of metal, like a fork or knife, and stuck it into the wall plug? Don't do it!
Why? It's because metals conduct electricity. And you would get a terrible shock!
Can you think why? It's because water is a good conductor of centricity. When your hands are wet or when your body is in a bathtub full of water, the electricity could flow right through you and give you an awful shock, or even kill you.
Electricity is very useful, but it can be dangerous. Be careful, be safe and be smart.
| A. Let electricity help you, not hurt you. B. Keep yourself away from the electricity. C. Therefore, you need to remember some safety rules. D. Don't touch any electrical appliance when you are wet. E. Make your home as safe as possible for kids with these tips. F. If you did, you would become part of the electrical path way. G. That's the place where the electricity flows into the light bulb. |
