Question

four point charges -Q, -q, 2q and 2Q are placed,one at each corner of a square. The relation between Q and queen for which the potential at the center of square is zero is ​

Answer 1

Answer:

et there is some point C on the line and we know that at the center of the line electric potential is zero  

so C is at the center of the line  

let point C is x distance away from charge +4micro coulomb then it is 1-x distance away

from charge -2mocro coulomb  

now,equate both of them  

               kQ1/r1=kQ2/r2

               4*10^-6/x=2*10^-6/1-x

        we get x=2

and here x is the position where electric potential is zero

Explanation: