The magnetic moment of a bar magnet is 0.5 Am^2. It is suspended in a uniform magnetic field of 8 × 10^–2 T. The work done in rotating it from its

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🧑‍🏫 Author: Aditya Bhatt Sir   |   🕒 Last Updated: July 13, 2025

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📘Question

The magnetic moment of a bar magnet is 0.5 Am^2. It is suspended in a uniform magnetic field of 8 × 10^–2 T. The work done in rotating it from its most stable to most unstable position is : 

(1) 16 × 10^–2 J 

(2) 8 × 10^–2 J 

(3) 4 × 10^–2 J 

(4) Zero           (JEE-2024)  

✅ Answer

The magnetic moment of a bar magnet is 0.5 Am^2. It is suspended in a uniform magnetic field of 8 × 10^–2 T. The work done in rotating it from its most stable to most unstable position is :  (1) 16 × 10^–2 J  (2) 8 × 10^–2 J  (3) 4 × 10^–2 J  (4) Zero 

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