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Electric Charges And Fields

Question

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What is the net force on an electric dipole placed in a uniform electric field?

Solution

Force acting on electric dipole due to charge q =

q \overset{⇀}{E}

Force acting on diploe due to charge -q=-

q \overset{⇀}{E}

Since, the electric field is uniform, net force acting on the diploe is 0.

F = 0

Some More Questions From Electric Charges and Fields Chapter

a) An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not?
b) Explain why two field lines never cross each other at any point?

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