| ⇦ | 
| ⇨ |
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: - If L and C denote inductance and capacitance,then the dimensions of L-C are
- A lens having focal length f and aperture of diameter d forms an image of intensity I
- Two spheres of mass m and M are situated in air and the gravitational force
- If F⃗ is the force acting on a particle having position vector r⃗ and ? ⃗ be the torque
- A slab consists of two parallel layers of two different materials of same thickness
Topics: Magnetic Effects of Current and Magnetism
(167)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If L and C denote inductance and capacitance,then the dimensions of L-C are
- A lens having focal length f and aperture of diameter d forms an image of intensity I
- Two spheres of mass m and M are situated in air and the gravitational force
- If F⃗ is the force acting on a particle having position vector r⃗ and ? ⃗ be the torque
- A slab consists of two parallel layers of two different materials of same thickness
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