Question

when does a piece of matter have a charge

Answer 1

Hey..!!

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Friction strips electrons so the rubbed amber would take on a negative charge. Actually, friction causes charges to shift.

Charges are indeed stripped from something, but they are collected up by something else. Amber does, indeed, become negatively charged by rubbing it with, say, fur.

The phenomon is called triboelectric effect. And a link is provided.

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I Hope It's help you..!!!

Answer 2

A piece of matter has a charge when it has more of one type of particle, either electron or protons than another

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