A point charge q_1 = -9.4*10^(-6) C is at the center of a thick conducting shell of inner radius a = 0.028 m and outer radius b = 0.0441 m, The conducting shell has a net charge of q_2 = 2.1*10^(-6) C

https://www.flipitphysics.com/Content/smartPhysics/Media/Images/EM/04/h4_sphere_v3.png
What is the value of the x-component of the electric field at point P, located a distance 0.073 m along the x-axis from q_1?

Question

A point charge q_1 = -9.4*10^(-6) C is at the center of a thick conducting shell of inner radius a = 0.028 m and outer radius b = 0.0441 m, The conducting shell has a net charge of q_2 = 2.1*10^(-6) C

https://www.flipitphysics.com/Content/smartPhysics/Media/Images/EM/04/h4_sphere_v3.png
What is the value of the x-component of the electric field at point P, located a distance 0.073 m along the x-axis from q_1?

adamaero · Answer

E = q_enclosed/(A*ε_0)
ε_0 = 8.85*10^(-12)

or 

E = kq/r
(k = 9*10^9)

anonymous · Answer

I will try my best to help you

adamaero · Answer

$$\frac{ 9000(1.6-9.4)  }{ 4\pi0.088^2 }$$

adamaero · Answer

that didn't work