If the distance between two charges is increased to three times the original distance, how will the electrical force between the charges compare with the original force?

Coulomb’s law says the electrical force is inversely proportional to the square of the distance: F ∝ 1/r². Tripling the distance makes the force 1/(3²) = 1/9 of its original value, so it decreases to one-ninth the original force.

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