Answer :

The electric dipole moment can be defined as the measure of the separation of positive as well as negative charges within a specific system. It tells us about the given system’s overall polarity.


Electric dipole moment, p = 4 × 10–9 C-m


Angle between p and uniform electric field, = 30


Electric field, E = 5 × 104 NC–1


The torque acting on a dipole is given by:


τ = p × E


τ = p×E×sinθ(θ=30)


= 4 × 10–9 C m x 5 × 104 NC–1 x (0.5)

= 10-4 N m

The magnitude of torque acting on the given dipole is 10-4 N m.

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