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mattmannmf
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A point charge q1 = -7.5 μC is located at the center of a thick conducting shell of inner radius a = 2.9 cm and outer radius b = 4.9 cm, The conducting shell has a net charge of q2 = 2.3 μC. (see attachment)
1. What is Ex(P), the value of the x-component of the electric field at point P, located a distance 7.5 cm along the x-axis from q1?
2. What is Ey(R), the value of the y-component of the electric field at point R, located a distance 1.45 cm along the y-axis from q1?
3. What is σb, the surface charge density at the outer edge of the shell? C/m2
4. What is σa, the surface charge density at the inner edge of the shell? C/m2
Ok so I am not very familier with the gauss law and how I set up the equations and such.
Lets just start with number 1.
I know I have to use the law: E= Q/ (4 *pi* eo *r)
where Q is the charge of q1 and r=.029m. I just don't know how the net charge q2 and its radius plays a role into the equation (i know it does but i just don't understand where to plug that in). is Q the difference of q1 and q2? how about r?
Number 3- Surface charge density is E*eo.
So to find this out, I just use E= Q/ (4 *pi* eo *r) where Q=q1 and r=.029 and eo is 8.85*10^-12
Any help would be great. THANKS!
1. What is Ex(P), the value of the x-component of the electric field at point P, located a distance 7.5 cm along the x-axis from q1?
2. What is Ey(R), the value of the y-component of the electric field at point R, located a distance 1.45 cm along the y-axis from q1?
3. What is σb, the surface charge density at the outer edge of the shell? C/m2
4. What is σa, the surface charge density at the inner edge of the shell? C/m2
Ok so I am not very familier with the gauss law and how I set up the equations and such.
Lets just start with number 1.
I know I have to use the law: E= Q/ (4 *pi* eo *r)
where Q is the charge of q1 and r=.029m. I just don't know how the net charge q2 and its radius plays a role into the equation (i know it does but i just don't understand where to plug that in). is Q the difference of q1 and q2? how about r?
Number 3- Surface charge density is E*eo.
So to find this out, I just use E= Q/ (4 *pi* eo *r) where Q=q1 and r=.029 and eo is 8.85*10^-12
Any help would be great. THANKS!