Two charged particles 1 m apart exert a 1-N force on each other.If the particles are instead 0.25-m apart,the force on each particle will be
A)1.0 N.
B)2.0 N.
C)4.0 N.
D)8.0 N.
E)16.0 N.

Question

Quizplus · Accepted Answer

The force between two charged particles is inversely proportional to the square of the distance between them (Coulomb's Law). Reducing the distance from 1 m to 0.25 m (which is 1/4 of the original distance) increases the force by a factor of (1/0.25)^2 = 16.

Two Charged Particles 1 M Apart Exert a 1-N Force