- #1

- Homework Statement
- Calculate the net electric field at point P from the diagram below

- Relevant Equations
- E=(kq)/r^2

Where k is plank's constant 9×10^9

R= distance or radius

Since q3=q4 and they are opposite to each others they cancel out

But as soon as I try to find the electric field of one of the charges, I need the radius which is not given.

By isolating the electric field for radius

E=(kq)/r^2

I now have two unknowns

But as soon as I try to find the electric field of one of the charges, I need the radius which is not given.

By isolating the electric field for radius

E=(kq)/r^2

I now have two unknowns