- #1

Noisuf

- 5

- 0

## Homework Statement

Four charges are arranged in a square. 2 Positive and 2 negative, in opposite corners. The magnitude is |1.6x10^-6 C|. The square's sides are 1 cm. A] At point X (Midpoint of of one of the sides. See Picture) Find the electric field direction and magnitude. B] What is the force of an electron at point X. C] What is the force on an electron that is very far away from the four poles.

## Homework Equations

E=(Kq)/r^2 F=qE

## The Attempt at a Solution

For A I know the electric field for all for points using the first equation. But at that point i don't know how to add them using vectors and what not. I added the top 2 and got 8.9X10^7. But I know the bottom two do something to the point, but i don't know what.

For B i know how to find once i have the field quantity. Just multiply it by the charge of the electron.

For C I guess my teacher means at infinity, therefore the field is 0. and with equation 2 makes the force 0, and making it an equilibrium.

Thanks for any help.