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  • A short bar magnet of magnetic moment 0.4 JT-1 is placed in a uniform magnetic field of 0.16 T. The magnet is in stable equilibrium when the potential energy is<div class='qna-option

A short bar magnet of magnetic moment 0.4 JT-1 is placed in a uniform magnetic field of 0.16 T. The magnet is in stable equilibrium when the potential energy is

Option: 1

- 0.082 J


Option: 2

0.064 J


Option: 3

- 0.064 J


Option: 4

Zero


Answers (1)

best_answer

\\ \text{We know that} \\ U=-M B \cos \theta$ \\ For stable equilibrium $\theta=0^{\circ}$ \\ $SO , U =- MB$ \\ $=-(0.4)(.16)\\ =-0.064 J$

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Divya Prakash Singh

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