At what point the electric potential zero. a sphere of mass, Ask an Expert

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Q. A sphere of mass 1.9 × 10-4 kg is suspended from a cord. A steady horizontal breeze pushes the sphere so that the cord makes a constant angle of 17° with the vertical. Find (a) the magnitude of that push and (b) the tension in the cord.

Q. A +3.0nC charge is at x = 0 cm and a -1.0nC charge is at x = 4cm. At what point or points on the x-axis is the electric potential zero?

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