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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)
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- A road of width 20 m forms an arc of radius 15 m,its outer edge is 2m higher than
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Topics: Magnetic Effects of Current and Magnetism
(167)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which one of the following statements is not correct in case of a semiconductor?
- A road of width 20 m forms an arc of radius 15 m,its outer edge is 2m higher than
- If the length of a stretched string is shortened by 4% and the tension is increased
- In a double slit experiment, the two slits are 1mm apart and the screen is placed 1 m
- Which wavelengths of sun is used finally as electric energy?
Topics: Magnetic Effects of Current and Magnetism (167)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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B is the right option