Question

what is the unit of magnetic moment?

Answer 1

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What is Magnetic Moment?

The magnetic moment is a determination of its tendency to get arranged through a magnetic field. As we all know, a magnet has two poles, i.e., North and South.

Magnetic moment can be defined as: The magnetic strength and orientation of a magnet or other object that produces a magnetic field.

Examples of objects having magnetic moments:

• Permanent magnets
• Astronomical objects.
• Loops of electric current
• Various molecules
• Elementary particles

Magnetic Moment Formula:

The magnetic moment is a vector relating torque of an object to the magnetic field. This is mathematically represented as:

$\sf \: τ = m × B$

Where,

• τ is the torque acting on the dipole
• m is the magnetic moment
• B is the external magnetic field

Magnetic Moment Unit:

In the definition for the current loop, the Magnetic moment is the product of the current flowing and the area, M = I A

So the unit conferring to this definition is articulated by Amp-m^2.

It can also be suggested in terms of torque and moment. Conferring to that, the torque is measured in Joules (J) and the magnetic field is measured in tesla (T) and thus the unit is J T^ -1.

So, these two units are equivalent to each other and are provided by 1 Amp-m2 = 1 J T ^-1.