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An electric dipole of dipole moment p is aligned parallel to a uniform electric field E. The energy required to rotate the dipole by 90⁰ is
Options
(a) p E²
(b) p² E
(c) p E
(d) infinity
Correct Answer:
p E
Explanation:
When electric dipole is aligned parallel θ = 0⁰ and the dipole is rotated by 90⁰ i.e., θ = 90⁰
Energy required to rotate the dipole W = Uⱼ – Uᵢ = (- pE cos 90⁰) – ( – pE cos 0⁰) = p E
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Topics: Electrostatics
(146)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Two point charge +9e and +e are at 16 cm away from each other.
- The nuclei of which one of the following pairs of nuclei are isotones?
- An electric motor operating on a 60 volt D.C supply draws a current of 10 amp.
- Given a sample of radium-226 having half-life of 4 days. Find the probability,
- A cyclist is riding with a spped of 27 km/h.As he approaches a circular turn
Topics: Electrostatics (146)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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