Electric Potential

1. May 18, 2009

glueball8

1. The problem statement, all variables and given/known data

Electrons are fired at a ball an infinite distance away at 100kev. The distance from the ball's center to the line in which the electrons are fired in is 0.6R. What is the ball's final potential at the radius?

2. Relevant equations

$$E=\frac{eQ}{4\pi \varepsilon_{o}\times R}$$

$$V=\frac{Q}{4\pi \varepsilon_{o}\times R}$$

3. The attempt at a solution

I'm think that 100keV*0.4 = keq/r therefore V=40kV. There's a lot of assumptions I'm not sure which ones I should make.

Last edited: May 18, 2009