Electricity on combs. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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Electricity on combs. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

For our experiments, we need three plastic combs. Hang a comb on a thread, tying the thread to its middle. Electrify the other comb by rubbing against a dry woolen cloth or against your own hair. Bring the end of the electrified comb closer to the end of the hanging comb.

The hanging comb will turn on the thread. Without touching it, you can make it rotate on a thread in one direction. And when the thread twists a little and the comb rotates in the opposite direction, it will be possible to stop it at a distance with the help of an electrified comb that you hold in your hand.

There are two kinds of electricity - positive and negative. Some substances are capable of being charged with positive electricity, others with negative electricity. Like charges repel each other, unlike charges attract. If you also electrify a comb hanging on a thread by rubbing it against matter, like the comb that is in your hand, then now the combs will not be attracted to each other, but, on the contrary, the hanging comb will begin to turn away.

With three combs, you can do this experiment. Connect two identical combs crosswise, inserting one in the middle of the other. Hang the resulting cross on a thin thread. Approaching alternately to the ends of the hanging combs the third, electrified one, you can make the crosspiece rotate.

Electricity on combs

Try to electrify other objects that you have. For example, a glass rod, rubbing it on silk, a sealing wax stick, rubbing it on cloth.

Sealing wax and glass are charged by different types of electricity. Think for yourself how to verify this by experience.

Author: Rabiza F.V.

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