| ⇦ | 
| ⇨ |
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: - The magnifying power of a convex lens of focal length 10 cm, when the image
- A wire carrying current I has the shape as shown in adjoining figure. Linear parts
- An explosion blows a rock into three parts. Two parts go off at right angles to each other
- A particle of mass m is driven by a machine that delivers a constant power k watts
- The workdone in turning a magnet of magnetic moment M by an angle of 90⁰ from the magnetic
Topics: Electrostatics
(146)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The magnifying power of a convex lens of focal length 10 cm, when the image
- A wire carrying current I has the shape as shown in adjoining figure. Linear parts
- An explosion blows a rock into three parts. Two parts go off at right angles to each other
- A particle of mass m is driven by a machine that delivers a constant power k watts
- The workdone in turning a magnet of magnetic moment M by an angle of 90⁰ from the magnetic
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