The Brainliest Answer!
It is a charge with very little magnitude and has a minor effect when kept in a place.
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thanks for your answer ,, hope u like my question
Thanks a looott buddy.. =)
are no issue yaar
                        A test charge is a charge that is small enough so that the charge configuration you are looking at is not disturbed. If you were to bring a 1μC charge up against some giant 1C charge, the smaller "test" charge would not really affect the position of the charge configuration you're studying. This leaves the equations dipole mentioned fairly easy to deal with.

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MASelvam IITian
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fab answer ,,, keep it up bro ,,
your answer really matters a lot