as seen in the diagram below, ->

http://picasaweb.google.com/devanlevin/DropBox?authkey=Gv1sRgCL_4l4PpvP_YsQE#5314956645280048530 [Broken]

is a solid ball with a radius of R=5cm and a charge density of [tex]\rho[/tex]=-3[tex]\mu[/tex]C/m

inside this ball, we make a hollow ball shaped space with a radius of R/3 with its centre at 2R/3 from the centre of the big ball.

what is the Electric field at point:

A-on the leftmost point of the hollow

B-on the top point of the hollow

C-at the centre of the big ball

---------------------------------------------------

how do i do this?

i think what i need to do is say that the field is equal to (the field of the original ball) + ( the field of a ball the size of the hollow, with a charge density of -[tex]\rho[/tex] )??

for C i know that the field before is 0 since it is at the centre, how do i continue from there?

http://picasaweb.google.com/devanlevin/DropBox?authkey=Gv1sRgCL_4l4PpvP_YsQE#5314956645280048530 [Broken]

is a solid ball with a radius of R=5cm and a charge density of [tex]\rho[/tex]=-3[tex]\mu[/tex]C/m

^{3},inside this ball, we make a hollow ball shaped space with a radius of R/3 with its centre at 2R/3 from the centre of the big ball.

what is the Electric field at point:

A-on the leftmost point of the hollow

B-on the top point of the hollow

C-at the centre of the big ball

---------------------------------------------------

how do i do this?

i think what i need to do is say that the field is equal to (the field of the original ball) + ( the field of a ball the size of the hollow, with a charge density of -[tex]\rho[/tex] )??

for C i know that the field before is 0 since it is at the centre, how do i continue from there?

Last edited by a moderator: