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uniidiot
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Homework Statement
three point charges, each of 10^-9 are located at 3 corners of a square of side 20cm. Calculate the electric potential at the forth corner.
Homework Equations
V = Q / (4(pi)(epsilon 0) r)
The Attempt at a Solution
Potential because of corner A = 10^-9 / (4 (pi) (epsilon 0) 0.2)
= 44.96
Potential because of corner B = 10^-9 / (4 (pi) (epsilon 0) 0.2)
= 44.96
Potential because of corner C = 10^-9 / (4 (pi) (epsilon 0) 0.284)
= 31.66
A + B + C = 121.58
Is this correct, finding the potential from each point charge individualy?
Also there is another question very similar to this where there are 4 point charges on the corners of a square, and we need to find the potential at the centre, would i do this the same as above, (providing what i did above is correct.