State the expression for the torque acting on a magnetic dipole in a u

1.	State the expression for the torque acting on a magnetic dipole in a uniform magnetic field.
Answer» When a magnetic dipole of magnetic dipole moment \(\vec M\) is placed in a uniform magnetic field of induction \(\vec B\), it experiences a torque whose magnitude is τ = MB sin θ where θ is the smaller angle between the magnetic axis and \(\vec B\). [Note: When the dipole is placed with its axis at right-angles to the field, i.e, θ = 90°, τ = MB or M = \(\cfrac{\tau}B\) This is the defining equation for the magnetic dipole moment.]

State the expression for the torque acting on a magnetic dipole in a uniform magnetic field.

Answer»

When a magnetic dipole of magnetic dipole moment \(\vec M\) is placed in a uniform magnetic field of induction \(\vec B\), it experiences a torque whose magnitude is

τ = MB sin θ

where θ is the smaller angle between the magnetic axis and \(\vec B\).

[Note: When the dipole is placed with its axis at right-angles to the field, i.e, θ = 90°,

τ = MB or M = \(\cfrac{\tau}B\)

This is the defining equation for the magnetic dipole moment.]

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State the expression for the torque acting on a magnetic dipole in a uniform magnetic field.

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