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Read the Following Selection
Read about current and static electricity, or click on the play button below to listen aloud.
Current and Static Electricity
Pull a wool hat off and your hair tries to stand on end. Walk across a carpet and you may get a shock when you touch something. Why does this happen?
When objects rub, a charge builds up on the surface. The charge can be positive or negative, like the poles on a battery. You cannot see the charge on an object, but you might see what the charge does. The charge makes hairs stand up and balloons stick to walls. The charge can also make a stream of water bend toward the charge.
Because the charge stays in place for a while, we call this charge static electricity. When the charge moves from one object to another, you may see—and feel—the spark.
Current electricity flows along a path called a circuit. A circuit connects the source of electricity to a load that does something useful. The source might be a power plant, or it might be a battery. A light bulb is one type of load.
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0 Essay(s) Pending (Possible Point(s): 0)
1. Choose the examples that use current electricity.CorrectIncorrect
2. Choose the examples that use current electricity.CorrectIncorrect
3.Items with the same charge push apart from each other. Items with opposite charges are attracted to each other. Do these items have the same charge or opposite?
A balloon sticks to a wall.CorrectIncorrect
4.Items with the same charge push apart from each other. Items with opposite charges are attracted to each other. Do these items have the same charge or opposite?
Hairs push away from each other so hard that they stand straight up.CorrectIncorrect
5. When clothes come out of the dryer, some may stick together. We call this “static cling” because static electricity causes the clothing to cling. Explain what happens to make the clothes stick together.
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