QUESTION 1(adsbygoogle = window.adsbygoogle || []).push({});

1. The problem statement, all variables and given/known data

Two positive charges, each with Q = +10 µC, are fixed to the x-axis at x = +a and x = -a, where a = 4 m.

(a) Find the electric potential at point A on the y-axis where (xA, yA) = (0, b) and b = 5 m. Take the zero of potential to be at infinity.

(b) A particle with charge q = -4 µC and mass m = 2.2 x 10-4 kg is released from rest at point A. Find its speed at the origin.

2. Relevant equations

Gauss's Law?

3. The attempt at a solution

I know I need to use superposition to calculate the potential at point A due the left-hand charge and add it to the potential at A due to the right-hand charge...

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# Homework Help: Electric Potential of 2 positive charges, and the speed

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