| ⇦ | 
| ⇨ |
The value of workdone for rotating a magnet of magnetic moment M by an angle θ in external magnetic field H is given by
Options
(a) MH cos θ
(b) 2MH sin²(θ/2)
(c) MH sin θ
(d) MH (1-sin²θ)
Correct Answer:
MH cos θ
Explanation:
MH (1 – cos θ) = work done
.·. W = MH [1 – 1 + 2 sin² (θ / 2)] = 2MH sin² (θ / 2)
Related Questions: - 40 g of Argon is heated from 40⁰C to 100⁰C (R=2 cal/mole). Heat absorbed at constant
- A remote-sensing satellite of earth revolves in a circular orbit at a height
- A body takes 5 minute for cooling from 50⁰C to 40⁰C. Its temperature
- The resistance of a wire is 5 ohm at 50° C and 6 ohm at 100° C. The resistance
- Two capacitors of 10pF and 20pF are connected to 200V and 100V sources, respectively.
Topics: Magnetic Effects of Current and Magnetism
(167)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- 40 g of Argon is heated from 40⁰C to 100⁰C (R=2 cal/mole). Heat absorbed at constant
- A remote-sensing satellite of earth revolves in a circular orbit at a height
- A body takes 5 minute for cooling from 50⁰C to 40⁰C. Its temperature
- The resistance of a wire is 5 ohm at 50° C and 6 ohm at 100° C. The resistance
- Two capacitors of 10pF and 20pF are connected to 200V and 100V sources, respectively.
Topics: Magnetic Effects of Current and Magnetism (167)
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
B is the right option