The distance between two identical point charges is increased from to

PHYSICS · Single correct · CBSE · Physics · Electric Charges and Fields · Electric Charges and Fields

Problem

The distance between two identical point charges is increased from 2 cm2\,\text{cm} to 6 cm6\,\text{cm}. How does the magnitude of the electrostatic force between them change? (a) It becomes one-third of the original value. (b) It becomes nine times the original value. (c) It becomes one-ninth of the original value. (d) It remains unchanged.

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