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A short bar magnet placed with its axis ...

A short bar magnet placed with its axis at `30^@` with a uniform external magnetic field of `0*25T` experiences a torque of magnitude equal to `4*5xx10^-2J`. What is the magnitude of magnetic moment of the magnet?

Text Solution

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The correct Answer is:
`0.36 JT^(-1)`
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A short bar magnet placed with its axis at 30^@ with a uniform external magnetic field of 0.25 T experiences a torque of magnitude equal to 4.5 xx 10^(-2) J. What is the magnitude of magnetic moment of the magnet?

A short bar magnet placed with its axis at 30^@ with a uniform external magnetic field of 0*16T experiences a torque of magnitude 0*032J . Estimate the magnetic moment of the magnet. If the bar were free to rotate, which orientations would correspond to its (i) , stable and (ii), unstable equilibrium? What is the potential energy of the magnet in the two case?

Knowledge Check

  • A short bar magnet placed with its axis at 30^(@) with a uniform external magnetic field of 0.35 T experiences a torque of magnitude equal to 4.5xx10^(-2)Nm . The magnitude of magnetic moment of the given magnet is

    A
    `0.26JT^(-1)`
    B
    `2.6JT^(-1)`
    C
    `0.26JT^(-1)`
    D
    `0.026JT^(-1)`

  • A short bar magnet, placed with its axis at 30^@ with an external magnetic field of 0.16 T, experiences a torque of magnitude 0.032 J. The magnetic moment of the bar magnetic is :

    A
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    B
    0.2
    C
    0.5
    D
    0.4

  • A short bar magnet, placed with its axis at 30^@ with an external magnetic field of 0.16 T, experiences a torque of magnitude 0.032 J. The magnetic moment of the bar magnetic is :

    A
    4
    B
    0.2
    C
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    D
    0.4

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