Question

how do we know that there are 2 kimds of charges​

Answer 1

Answer:

There are two types of electric charge: positive charge and negative charge. If the same amounts of negative and positive charge are found in an object, there is no net charge and the object is electrically neutral. ... Negatively charged: electrons are added giving the object an excess of electrons.

Explanation:

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Answer 2

Answer:

There are two types of electric charge: positive and negative (commonly carried by protons and electrons respectively). Like charges repel each other and unlike charges attract each other.

Explanation:

There are two types of electric charge: positive charge and negative charge. If the same amounts of negative and positive charge are found in an object, there is no net charge and the object is electrically neutral. ... Negatively charged: electrons are added giving the object an excess of electrons.

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