Positive charge Q is distributed uniformly throughout an insulating sphere of radius R, centered at the origin. A particle with charge Q is placed at x = 2R on the x axis. The magnitude of the electric field at x = R/2 on the x-axis is

Explanation:

 Given that

Charge on the sphere = Q

Radius = R

The charge on the particle = Q

x= 2 R

We have to find out electric filed at x= R/2

The electric field due to charge on the sphere :

E₁ is in positive x direction .

The electric field due to point charge :

E₂ is in negative direction.

Total electric filed E

E=E₁ - E₂