Question

21. Write the expression for magnetic potential energy of a magnetic dipole kept in a uniform magnet
and explain the terms.

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Answer 1

•The magnetic potential energy of a magnetic dipole kept in uniform magnetic field is defined as the amount of work done in rotating the dipole from zero potential energy position to some angle.

•It is given by U = -MBcos(theta)

where, U is magnetic potential energy,

M is magnetic moment(in Am²),

B is magnetic field strength(in Tesla), and

theta is the angle formed by the dipole with the axis(in degrees).