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JAMB Physics 2005 Question 32

Question 32

Electrostatics

A force of 200 N acts between two objects at a certain distance apart. The value of the force when the distance is halved is

  1. A.100 N.
  2. B.200 N.
  3. C.800 N.
  4. D.400 N.
Show the answer and explanation

Answer: C (800 N.)

Explanation

The force follows the inverse-square law: halving the distance makes it 22 = 4 times bigger, 800 N.