The point x = 0 is the midpoint between the two positive charges. The electric field is zero at this point.
E = Ea + E-a
Two positive point charges q are placed on the x-axis, one at x = a and one at x = -a.
(a) Find the magnitude and direction of the electric field at x = 0.
(b) Derive an expression for the electric field at points on the x -axis. Use your result to graph the x-component of the electric field as a function of x, for values of x between -4a and +4a.
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Electric Field concept. You can view video lessons to learn Electric Field. Or if you need more Electric Field practice, you can also practice Electric Field practice problems.