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Same charges repel, different charges attract - PowerPoint PPT Presentation


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Two types of charge. +. -. +. -. -. +. Same charges repel, different charges attract. Same charges repel, different charges attract. How rubbing can produce static electricity. At the start each material has no overall charge. Friction rubs electrons off

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Presentation Transcript
slide2

Two types of charge

+

-

+

-

-

+

Same charges repel, different charges attract

slide4

How rubbing can produce static electricity

At the start each material has no overall charge.

Friction rubs

electrons off

the cloth onto

the surface atoms of

polythene.

The polythene

gains electrons

and becomes

negatively

charged.

The cloth loses electrons and becomes equally

positively charged.

However,

acetate

becomes

positively

charged

slide5

However,

acetate

becomes

positively

charged