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Charging by friction: The process of charging two uncharged objects by
                         rubbing the two objects together.

  Explanation of static electricity:
  When an ebonite rod is rubbed with a
  piece of silk:

Silk (+ve) Electrons transfer Ebonite (-ve)

            Silk                Silk + + electron
            Ebonite + electron
                                                Ebonite -

   ? Object (loses electrons) becomes positively charged, while the
      object (gains electrons) becomes negatively charged

-The charges that accumulate on the surfaces of objects when they lose or
gain electrons are described as static electricity (electrostatic charges).

Static Electricity (Electrostatic charges): The charges that accumulate
        on the surfaces of objects when they lose or gain electrons.

   -The type of charge acquired by the rubbed object differs
                             depending on the:

1- Type of the rubbing material.

2- Position of the material in the

    electrostatic series.

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