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NEET-XII-Physics

01: Electric Charges And Fields

I - page 2
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  • #10
    An electric dipole with dipole moment 4 × 10-9 C m is aligned at 30° with the direction of a uniform electric field of magnitude 5 × 104 N C-1. Calculate the magnitude of the torque acting on the dipole.
    Ans : Electric dipole moment, p = 4 × 10-9 C m

    Angle made by p with a uniform electric field, θ = 30°

    Electric field, E = 5 × 104 N C-1

    Torque acting on the dipole is given by the relation,

    τ = pE sinθ



    Therefore, the magnitude of the torque acting on the dipole is 10-4 N m.