Recent content by PrincessYams

I remember reading that any hole within a conductor in electrostatic equilibrium has an electric field that must equal zero unless it has a charge in it. This one does have a charge. But would it still equal zero? Thanks for all the help so far by the way!

I got E = +λ1/(2πrϵ0) for region 1, E = +λ2/(2πrϵ0) for region 2, and E = N (weird N i can't draw sorry) / 2ϵ0 for region 3. I have a feeling this is wrong but I never really learned this and I am having a hard time understanding what part of it is screwy.

Thanks! I guess what we were taught applied to something else. For part B, I just plug the two values into the equations I get and add them?

Homework Statement A coaxial cable consists of two concentric cylindrical conductors as shown here: http://puu.sh/luFZx/7f3e1ccb07.png . The inner cylinder has a linear charge density of +λ1, meaning that each meter of the cable will have λ C of charge on the inner cylinder. The outer cylinder...

Oh, I see. The example I was looking at must have done something like that and I didn't notice. I see now. Thanks for all the help! 72000 + 72000 - 56000 = 88000 Finding the final velocity should just be: v = √ (2Q(change in V)) / m) ?

I don't understand. Did I mix up the trig functions so that it is SUPPOSED to be: E1 = 89900 E1x = 89900 * sin(36.9) = 54000 E1y = 89900 * cos(36.9) = 72000 E2x = -89900 * sin(36.9) = -54000 E2y = 89900 * cos(36.9) = 72000 E3x = 0 E3y = -56000 Or am I using the wrong angle entirely?[/SUB]

Oh, yeah oops. That was a typo. To clarify what I got (for my sake): E1 = 89900 (to get the x- and y-components I multiplied this by cos(36.9) and sin(36.9) respectively) E1x = 72000 E1y = 54000 E2x = -72000 E2y = 54000 E3x = 0 E3y = -56000 All x-values = 0 All y-values = 52000 Thanks...

Oh! That is what I did. Sketching the diagram really did help. So now the Ex is gone. It was the 5400 + 5400 + (-5600) I was supposed to do. So I got 52000 upwards/positive y-direction? Thanks! I should mark these more clearly in my work and check over small mistakes like that. I forgot...

Homework Statement [/B] Three point charges are arranged as shown here: http://puu.sh/ltvxF.png a. Find the electric field at point A. (Give as vector, either as i and j or magnitude and direction.) b. Find the potential at point A. c. If an electron is placed at point A and released, what is...