If the distance between two point charges is halved, the electrostatic force between them becomes
- A. half
- B. double
- C. four times
- D. one quarter
Explanation
Force varies as one over the square of the separation, so halving the distance multiplies the force by four. Answering double treats the relationship as a simple inverse, which is the standard error. Tripling the distance would reduce the force to one ninth by the same reasoning.
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