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Write the expression for the torque on a...

Write the expression for the torque on a current loop placed in a uniform magnetic field and explain the terms used.

Text Solution

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`tau=MBsintheta` where magnetic moment M = IA
where, I - current, A - area of loop = `pir^(2)`.
`tau_(max)=MB, tau_(min)=0`
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Knowledge Check

  • A charged particle placed in a uniform magnetic field experiences :

    A
    A force in the direction of the field
    B
    A force opposite to the direction of the field
    C
    A force perpendicular to the direction of the field
    D
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  • A charged particle placed in a uniform magnetic field experiences :

    A
    A force in the direction of the field
    B
    A force opposite to the direction of the field
    C
    A force perpendicular to the direction of the field
    D
    No force at all

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