Attraction and Repulsion of Charged Rods

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   attract      charged      Electrons      negatively      Opposite      positively      repel      rubbed      Similar   
When a piece of polythene is rubbed with a cloth, it becomes .
are 'rubbed' off the cloth and onto the polythene by friction.
This makes the polythene charged and leaves the cloth positively charged.
If this rod is hung by a piece of thread, and a similarly charged rod brought close to it, we see that they each other.
charges will repel.

Similarly, when a piece of Perspex is rubbed with a cloth it becomes charged. Electrons have been from the Perspex onto the cloth.
If this positive rod is hung by a piece of thread, and a negatively charged polythene rod brought close to it, we see that they each other.
charges will attract.