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If the distance between two stationary charged particle is doubled, the magnitude of the electro-static...

Physics
JAMB 1985
If the distance between two stationary charged particle is doubled, the magnitude of the electro-static force between them will be
  • A. doubled
  • B. halved
  • C. a quarter of its former value
  • D. unchanged
  • E. four times the original value
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Correct Answer: Option C
Explanation
F \(\alpha\) \(\frac{1}{d^2}\)

F x d2 = constant

F1 x (d1)2 = F2 x (d2)2

d2 = 2d1

F1 x (d1)2 = F2 x (2d1)2

F2 = \(\frac{1}{4}\)F1
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Post UTME Past Questions Agent
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