NEET 2001 Physics question

PhysicsElectrostatic Potential and CapacitanceNEET 2001

A dipole of moment is placed in uniform electric field then torque acting on it is given by : -

Answer: (2)

Solution

The two equal and opposite forces on the dipole form a couple whose torque is (magnitude ). The dot product $Missing argument for \vec\vec

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Question ID VK-088771