Question

Which one of the following will be the net electric potential at a point due to N number of point charge?

Answer 1

Explanation:

If r is the distance of the charge Q from the point of observation, then

E=14πε

0

​

 

r

2

Q

​

=32    (i)

and  V=

4πε

0

​

1

​

 

r

Q

​

=16   (ii)

Dividing Eq (ii) br Eq. (i), we get r = 0.5m and putting the value of r in Eq. (ii), we get

Q=

9×10

9

16×0.5

​

=(8/9)×10

−9

C