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  • A short bar magnet of magnetic moment 0.4JT-1 is palced with a uniform magnetic field of 0.16T. The magnet is in stable equitibrium when the potential energy (in J)  is :<d

A short bar magnet of magnetic moment 0.4JT-1 is palced with a uniform magnetic field of 0.16T. The magnet is in stable equitibrium when the potential energy (in J)  is :

Option: 1

-0.064


Option: 2

0.064


Option: 3

-0.082


Option: 4

0


Answers (1)

best_answer

As we learn

Potential Energy -

U= -MB\cos \Theta =-\vec{M}\cdot \vec{B}

- wherein

\Theta - angle made by the dipole with the field

 

 For stable equilibrium

U = -MB

= - (0.4) (0.16) = - 0.064J

Posted by

Shailly goel

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