| ⇦ | 
| ⇨ |
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
Related Questions: - If h is Planck’s constant, the momentum of a photon of wavelength 0.01 Å is
- A and B are two metals with threshold frequencies 1.8 x 10¹⁴ Hz and 2.2 x 10¹⁴ Hz.
- The electric potential V at any point (x,y,z) all in meters in space is given by
- The displacement of a particle varies according to the relation x=4 (cos π t + sin π t)
- The drift velocity of free electrons in a conductor is v, when a current
Topics: Electrostatics
(146)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If h is Planck’s constant, the momentum of a photon of wavelength 0.01 Å is
- A and B are two metals with threshold frequencies 1.8 x 10¹⁴ Hz and 2.2 x 10¹⁴ Hz.
- The electric potential V at any point (x,y,z) all in meters in space is given by
- The displacement of a particle varies according to the relation x=4 (cos π t + sin π t)
- The drift velocity of free electrons in a conductor is v, when a current
Topics: Electrostatics (146)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply