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Electric Charges and Fields

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Coulomb

Coulomb’s law states that Force exerted between two point charges is

  1. directly proportional to the product of the magnitude of the two charges (q1, q2),
  2. Is inversely proportional to the square of the distance between these charges (r),
  3. directed along the separation vector connecting their centres (r̂).

straight F space equals space straight k fraction numerator vertical line straight q subscript 1 space straight q subscript 2 vertical line over denominator straight r squared end fraction space where space straight k space equals fraction numerator 1 over denominator 4 πε subscript 0 end fraction
straight F space equals space fraction numerator 1 over denominator 4 πε subscript 0 end fraction fraction numerator vertical line straight q subscript 1 straight q subscript 2 vertical line over denominator straight r squared end fraction
Here space straight epsilon subscript 0 space equals space 8.854 space straight x space 10 to the power of negative 12 end exponent space straight C squared straight N to the power of negative 1 end exponent straight m to the power of negative 2 end exponent

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