Answer :
Final answer:
According to Coulomb's law, the force between two charges decreases as the square of the distance between them increases, leading to a quarter of the original force when the distance is doubled.
Explanation:
Coulomb's law states that the force between two charges decreases as the square of the distance between them increases. When the distance is doubled, the force becomes one-fourth of its original value. Therefore, if the distance between two positive charges is doubled, the force of repulsion decreases to a quarter of the original force.
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