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Define Torque Acting on a Dipole of Dipole Moment → P Placed in a Uniform Electric Field → E Express It in the Vector from and Point Out the Direction Along Which It Acts. - Physics

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(a) Define torque acting on a dipole of dipole moment \[\vec{p}\] placed in a uniform electric field \[\vec{E}\] Express it in the vector from and point out the direction along which it acts. 

Express it in the vector from and point out the direction along which it acts.
(b) What happens if the field is non-uniform?
(c) What would happen if the external field
\[\vec{E}\]  is increasing (i) parallel to \[\vec{p}\] and (ii) anti-parallel to \[\vec{p}\] ?
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2015-2016 (March) Foreign Set 2

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