The magnitude of the electric
force between two point charges is directly proportional to the product of the
charges and inversely proportional to the square of the distance between them
Valid only when objects are small
size particles and distance between them is large as compared to their sizes
The Coulomb’s Law can be
mathematically expressed as
F= ( q1 * q2) / r2
F is the force of attraction or repulsion,
measured in Newton
k is the Universal Electrostatic Constant,
equal to 9 ´ 109 N m2/C2
q1 and q2 are the magnitudes
of charges, measured in C
r is the distance between the charges, and is
measured in m where K is proportionality constant which depends upon the
medium i.e. εo
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