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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 = 90⁰, the torque and the potential energy of the dipole will respectively be:
Options
(a) p E sin θ, – p E cos θ
(b) p E sin θ, – 2 p E cos θ
(c) p E sin θ, p E cos θ
(d) p E cos θ, – p E sin θ
Correct Answer:
p E sin θ, – p E cos θ
Explanation:
The torque on the dipole is given as ? = p E sin θ. The potential energy of otghe dipole in the electric field is given as U = – p E cos θ.
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Topics: Electrostatics
(146)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A block of mass m is moving on a wedge with the acceleration aᵒ
- Two cells, having the same e.m.f. are connected in series through an external resistance
- The threshold wavelength for photoelectric effect of a metal is 6500 Å. The work function
- A wire of length 2 m is made from 10 cm³ of copper. A force F is applied so that
- When a mass M is attached to the spring of force constant k,
Topics: Electrostatics (146)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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