Torque on a dipole in electric field (derivation) | Electric fields & charges | Khan Academy

Let's derive the expression for the torque acting on a dipole placed in a uniform electric field. We will also explore the stable and unstable equilibrium positions.
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Created by Mahesh Shenoy

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Sir what about work done by torque, external forces and electric forces?

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Why is the distance taken between the 2 charges if the point of rotation is in the middle ?? Should the distance in torque not be the perpendicular distance between the mid point of the 2 charges ?

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I believe if you add the torques you can add the distances L/2 + L/2 which is just L and you get the same thing as the vid

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