Question

Two similar spheres having +Q and -Q charges are kept at a certain distance. F force acts between the two. If at the middle of two spheres, another similar sphere having +Q charge is kept, then it experiences a force in magnitude and direction as​

Answer 1

Answer:

search and do

Answer 2

Answer:

given = +Q and -Q

            force = F

to find = magnitude and direction.

solution,

+Q..........................+Q.....................-Q

A          r/2            B         r/2        C

                             r

when a similar sphere B having charges +Q is kept at the mid point of the line joining A and C ,

Fnet = FA  + FC = kQ²/ (r/2)² + kQ²/ (r/2)²

                          =  8KQ²/ r²

                          =  8F

the magnitude of force is 8F