This activity is all about making a piece of paper move with static superpowers!
When you rub the ruler on your t-shirt you are charging the ruler up with static electricity. This action gives the ruler additional electrons, generating a negative static charge. Meanwhile, the piece of paper balancing on the pencil has a neutral charge.
When you move the ruler close to the paper it charges up the edge of the paper with an opposite charge. Opposite charges attract, which causes the paper to get pulled in whichever direction you move the ruler!
Did you know that static electricity is used in printers and photocopiers to help attract the ink to the paper!
KS3 Physics: Pupils should be taught about separation of positive or negative charges when objects are rubbed together: transfer of electrons, forces between charged objects
KS3 Physics: Pupils should be taught about the idea of electric field, forces acting across the space between objects not in contact
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