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  4. Assertion Magnetic dipole possesses maximum potential energy when magnetic moment and magnetic field are parallel to each other. Reason Current loop is treated as a magnetic dipole.

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Q. Assertion Magnetic dipole possesses maximum potential energy when magnetic moment and magnetic field are parallel to each other.
Reason Current loop is treated as a magnetic dipole.

Magnetism and Matter

Solution:

We know that, magnetic dipole posses maximum potential energy when magnetic moment and magnetic field are anti-parallel. A current loop can be treated as a magnetic dipole. When the current loop has an area, $A$ and carries a current, $I$ then the magnetic dipole moment is given by $M=I A .$