Net electric field, E = E1 + E2, where E1 is the electric field due to charge q1 and E2 is the electric field due to charge q2.
We're looking for a point where the electric field will be zero.
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A -2.0 nC charge and a +2.0 nC charge are located on the x-axis at x = -1.0 cm and x = +1.0 cm, respectively.
a. At what position or positions on the x-axis is the electric field zero?
b. At what position or positions on the x-axis is the electric potential zero?
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