what is electric charge ? and it's significance In electrostatic
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Electrostatics is a branch of physics that studies electric charges at rest. Since classical physics, it has been known that some materials, such as amber, attract lightweight particles after rubbing. ... Electrostatics involves the buildup of charge on the surface of objects due to contact with other surfaces.
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Electric field is a characteristic of the system
of charges and is independent of the test charge
that we place at a point to determine the field . the term field in physics generally refers to a quantity that is defined at every point in space and may very from point to point.
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