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Octoshark
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Homework Statement
Two point charges lie on the x axis. A charge of -2.5 µC is at the origin, and a charge of +8.5 µC is at x = 10.0 cm.
What is the net electrical field at points x = +4 and at x = -4?
Homework Equations
E = kq/r^2
The Attempt at a Solution
For x = +4...
E= 9x10^9(8.5x10^-6)/.06^2 = 21250000
E= 9x10^9(-2.5x10^-6)/.04^2 = -14062500
Net E = 7187500 (which is wrong)
How do I solve this? Thanks.