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PHYHelp519
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Homework Statement
On the x axis, charge +Q lies at x = -a and charge -Q lies at x = +a. Point P lies on the axis at
x = +b, where b > a. a) Work out the electric field magnitude of P b) What is the direction of this …field?
Homework Equations
E=kqr/r3
The Attempt at a Solution
E=2kQa/(b2-a2) + 2kQa/(b2-a2)=
Ep=4kQab/(b^2 - a^2)^2. My teacher said that the solution was correct, however my work was not.
For b, I determined the direction to be to the right towards the negative charge.
I would appreciate any assistance.