Coulomb law

The Coulomb law describes the force between two point charges. It states that the force is directly proportional to the product of the charges and inversely...

The Coulomb law describes the force between two point charges. It states that the force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

$F=k\frac{q_1q_2}{r^2}$

where:

F is the force in newtons
k is a constant equal to 9 × 10^9 N m^2/C^2
q1 and q2 are the charges in coulombs
r is the distance between the charges in meters

For example, if two charges, q1 = 2.00 coulombs and q2 = 3.00 coulombs, separated by a distance of 0.100 meters, the force between them would be:

$F = (9 \times 10^9 \mathrm{ N/C}^2)\frac{(2.00 \times 10^{-9} \mathrm{ C})(3.00 \times 10^{-9} \mathrm{ C})}{0.100 \mathrm{ m}}$

which would be approximately 0.0006 N

$F=k\frac{q_1q_2}{r^2}$

where:

F is the force in newtons
k is a constant equal to 9 × 10^9 N m^2/C^2
q1 and q2 are the charges in coulombs
r is the distance between the charges in meters

For example, if two charges, q1 = 2.00 coulombs and q2 = 3.00 coulombs, separated by a distance of 0.100 meters, the force between them would be:

$F = (9 \times 10^9 \mathrm{ N/C}^2)\frac{(2.00 \times 10^{-9} \mathrm{ C})(3.00 \times 10^{-9} \mathrm{ C})}{0.100 \mathrm{ m}}$

which would be approximately 0.0006 N

Coulomb law

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