Question

the potential at a point 0.1 m from an isolated point charge is 100 v.find the nature and magnitude of the point charge.

Answer 1

Hi...
Hope this helps u!!

Answer 2

The nature of the point ?

V = potential at a point d distance away from a charge Q

           =  1/(4πε)  * Q / d²

=>    100 Volts = 9 * 10^9  * Q /0.1²

       =>  Q = 1.11 * 10⁻¹⁰  coulombs

 

As the potenial is positive.  the given charge is positive.    At the point P 0.1 m away from the isolated charge, the nature is :  positive. 

Kk