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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)
Related Questions: - A block of mass 0.50 kg is moving with a speed of 2.00 ms⁻¹ on a smooth surface.
- A rocket is fired upward from the earth surface such that it creates an acceleration
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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
- A block of mass 0.50 kg is moving with a speed of 2.00 ms⁻¹ on a smooth surface.
- A rocket is fired upward from the earth surface such that it creates an acceleration
- 24 cells of emf 1.5 V each having internal resistance of 1 ohm are connected
- A cyclotron is used to accelerate
- In circular coil, when number of turns is doubled and resistance becomes 1/4th
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