Choose
The units of 1/4πε0 are:
A. N2C2
B. N • m/C
C. N2 • m2/C2
D. N • m2/C2
E. m2/C2

Option D

N • m2/C2

Explanation:

The Cuolomb force constant also known as electric force constant, 1/4πε0

is given as a product of force acting in a unit area per square cuolomb hence its unit is Newton squared metre per square cuolomb as represented by N • m2/C2

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach