Electricity repels. Fun physical experience at home

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Electricity repels. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

Experiences with octopus и cowardly showed that electricity can do more than just attract. Sometimes it is repulsive. The tentacles of the octopus repel each other. And the coward's hair stood on end because they also repelled.

Why does electricity behave so strangely, so inconsistently? It turned out that there is not one, but two types of electricity. One species is the one with which we have done most of our experiments. It is obtained by rubbing plastic, ebonite, sealing wax with wool. But there is another kind of electricity. To get it, you need to rub a glass rod or plate with a silk cloth. Only from real glass, not from organic!

This experience at home turns out badly. It is necessary that both the glass rod and the silk cloth are very clean and very dry. If you achieve this, you will see that the "glassy" electricity (called positive) acts in the same way as the negative one with which you are already familiar. It attracts scraps of paper, turns the ruler on the egg behind it, raises the coward's hair on end. Remember that the electrotheater is obtained with ordinary glass, although not as well as with organic glass.

Electricity repels

What is the difference between positive and negative electricity? The easiest way to understand this is to make two "electric shorts". Put them on the table not far from each other and charge one, say, from a wax stick. He will be "scared", but the hair of the other one, whom you did not charge, will also move. They will reach for the hair of the first panty.

Electricity repels

If you rub the wand again and charge the second coward as well, he will also be "scared." Bring together two equally charged cowards. Their hair repels! Exactly the same thing happens with a glass rod. But if one coward is charged from a wax stick, and the other from a glass one, their hair will be attracted.

Author: Galpershtein L.Ya.

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