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Two charges 2 µC and –2 µC are placed at...

Two charges 2 µC and –2 µC are placed at points A and B 6 cm apart.
(a) Identify an equipotential surface of the system.
(b) What is the direction of the electric field at every point on this surface?

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(a) The plane normal to AB and passing through its mid-point has zero potential everywhere.
(b) Normal to the plane in the direction AB.
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