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Physics - Electrostatics Question with Solution | TestHub

PhysicsElectrostaticsdipoleMedium2 minPYQ_2012

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An electric dipole of moment $p$ is placed in an electric field of intensity $E$ . The dipole acquires a position such that the axis of the dipole makes an angle $θ$ with the direction of the field. Assuming that the potential energy of the dipole to be zero when $θ = 9 0^{\circ}$ , the torque and the potential energy of the dipole will respectively beNEET 2012 (Screening)

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Answer:

Solution:

Here, Torque $τ = pE sin θ$
Potential energy of the dipole $U = - \int τ d θ = - \int_{π /2}^{0} pE sin θ d θ = pE [cos θ - 0] = - pE cos θ$

Stream:NEETSubject:PhysicsTopic:ElectrostaticsSubtopic:dipole

⏱ 2mℹ️ Source: PYQ_2012

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