Two-point charges are attracted from each other with a force of 6kN. If the distance between them is reduced to one fourth of its original value, determine the new force of attraction between them.
According to the Coulomb's law, the force between two point charges is proportional to the squared distance between them:
where is the force and is the distance in first case. Similarly:
where is the new force and is the reduced distance. Taking the ration of these two expressions, obtain:
Answer. 96kN.
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