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Physics Formulas
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Electromagnetism
> Coulomb's Law
Coulomb's Law
Where
q
is a point charge.
The electric field intensity of a positive point charge is in the outward radial direction and has a magnitude proportional to the charge and inversely proportional to the square of the distance from the charge. It means if we have an electric field caused by a positive point charge. Then we can measure the strength of that field at different distance, which is
R
. The further we measure the strength, the great become
R
, and the less become the strength of that field at the particular place.
When a charge is not at the center of a coordinate, we can use the following equations:
since
thus:
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