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# Electric Potential

## Question

Question: Three charges are placed at the corners of an equilateral triangle with sides of length 2.0 m. The three charges at the corners of the triangle at +4.0 X 10^-6 C, +2.0 X 10^-6 C, and -4.0 10^-6 C.

Determine the electric potential at the midpoint of each side of the triangle.

What I have done so far: So we know that the formula for electric potential is V=kq/r. So we can just use one of the charges to find the voltage. However, the answer differs depending on which of the 2 charges(which vertices you pick) for each charge.

Thank you for taking the time to answer my question.

## Recommended Posts

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I don't think you can use just one of the charges to find the voltage.  For each point, you need to add up the potential (kq/r) for each charge.

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This may provide some more help / background:

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