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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
- Minority carriers in a p-type semiconductor are
- A ship A is moving westwards with a speed of 10 km/h and a ship B 100 km
- A common emitter amplifier has a voltage gain of 50, an input impedance of 100Ω
- A particle is executing the motion x=Acos (ωt-θ). The maximum velocity of the particle is
- Work of 3.0×10⁻⁴ joule is required to be done in increasing the size of a soap film
Topics: Electrostatics (146)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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