passwella.
Menu

JAMB Physics 1985 Question 36

Question 36

Electrostatics

If the distance between two stationary charged particles is doubled, the magnitude of the electrostatic force between them will be

  1. A.doubled
  2. B.halved
  3. C.a quarter of its former value
  4. D.unchanged
  5. E.four times the original value.
Show the answer and explanation

Answer: C (a quarter of its former value)

Explanation

Coulomb's law is an inverse-square law, so doubling the distance gives (½)² = ¼ of the force.