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A short bar magnet of magnetic moment 0.4JT−1 is placed in a uniform magnetic field of 0.16 T. The magnet is in stable equilibrium when the potential energy is
  • a)
    0.064 J
  • b)
    -0.064 J
  • c)
    zero
  • d)
    -0.082 J
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
A short bar magnet of magnetic moment 0.4JT−1 is placed in a uniform ...
Here, Magnetic moment,
M = 0.4JT−1
Magnetic field, B = 0.16T
When a bar magnet of magnetic moment is placed in a uniform magnetic field
,its potential energy is
For stable equilibrium,θ = 0°
∴ U = −MB = −(0.4JT−1)(0.6T) = −0.064J
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A short bar magnet of magnetic moment 0.4JT−1 is placed in a uniform magnetic field of 0.16 T. The magnet is in stable equilibrium when the potential energy isa)0.064 Jb)-0.064 Jc)zerod)-0.082 JCorrect answer is option 'B'. Can you explain this answer?
Question Description
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