# CHAPTER01 : THE FUNDAMENTAL LAWS OF ELECTRICAL ENGINEERING¶

## Example E01 : Pg 07¶

In [1]:
import math
E0 = 1./(36.*math.pi*10.**9.); # permitivity in free space
k = 4.*math.pi*E0 ;
q1 = 1.; #  charge on the first particle in coulombs
q2 = 1.; #  charge on the second particle in coulombs
d = 1.; #  distance between the particles in meter
F = (q1*q2)/(k*d**2.); # force between the two particles in newtons

print '%s %.e' %("force in free space between the two particles is in Newtons is:",F)

force in free space between the two particles is in Newtons is: 9e+09