![]() ![]() Rubbing a balloon on your head or dragging your feet on the carpet will build up a charge, but so will ordinary walking or repeatedly touching your head with a balloon! It’s the mere contact between two different materials that causes charge to move from one object to another. The result is that a normally neutral material will have a slight charge when near the charged object, and it is enough for the two to attract.Įlectrostatic charges are not caused by friction, although many assume this to be the case. In other words, the neutral material “picks up” charge on its near and far side, relevant to the charged object. This phenomenon is called an induced charge. When a charged object is brought close to a neutral material, the electrons on the neutral material will either move toward the charged object (if it has a positive charge) or away from the charged object (if it has a negative charge). Shocks come from gaining or losing electric charge in a hurry. If you have extra electrons piled on you, they will spill off when you touch an object like a doorknob, and give you a shock. Since things with the same charge repel each other, the hairs try to move away from each other by standing up and away from all the other hairs, resulting in you having a very funny-looking hairdo!Īnother example: if you walk across a carpet, electrons move from the rug to you. After you’ve combed your hair, every single hair has the same positive charge. If two objects have the same charge, they repel (or push away) from each other. ![]() ![]() If two objects have different charges, they attract (or pull towards) each other. This “separation of charge” is the reason for the collection of effects we call static electricity. The comb, covered in negatively charged electrons, becomes negatively charged as well, and your hair is left with a positive charge. If you comb your hair, for example, electrons leave the atoms and molecules in your hair and travel to the plastic comb. An atom usually has the same number of protons and electrons, but sometimes electrons can be moved away from their atoms. The atoms are made up of even smaller parts called protons, electrons and neutrons. Describe the movement of electrons from one material to another.ĭetermine the resulting charge of two materials rubbing together.Įxplain how static charge causes materials to attract or repel each other.Įverything we see is made up of tiny particles of matter called atoms. ![]()
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