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# Magnetic moment is expressed in:A. FaradayB. CalorieC. Bohr magnetonD. Debye

Last updated date: 21st Mar 2023
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Hint:The magnetic strength and orientation of a magnet or the other object that produces magnetic fields. Now let's briefly discuss the magnetic moment expression briefly.Magnetic moment, also known as magnetic dipole moment, is the measure of the object’s tendency to align with a magnetic field.

Faraday: It is a dimensionless unit of electric charge equal to approximately $6.02 \times {10^{23}}$ electric charges. Faraday is not expressed in a magnetic moment.
Calorie: It is a unit of measurement, but it doesn’t measure weight or length. Calorie is a unit of energy. It was originally defined as the amount of heat required at a certain atmosphere to raise the temperature.

Bohr magneton: It is a physical constant and natural unit for expressing the magnetic moment of an electron, either in orbital or spin momentum. The value of Bohr magneton is equal to $9.274 \times {10^{ - 24}}{J/T}$.
${\mu _B} = \dfrac{{eh}}{{2{m_e}}}$
Where, $e$ is the elementary charge, $h$ is the planck's constant and ${m_e}$ is the electron rest mass.
Thus the Bohr magneton is expressed in Magnetic momentum.

Debye: Debye is used to express electric dipole moment of molecules. One Debye is equal to $3.336 \times {10^{ - 30}}$ coulomb meter. Debye is a CGS unit in electric dipole moment named in honor of the physicist Peter.

Hence, the unit of magnetic moment is Bohr magneton and the correct option is C.

Note:The magnetic moment unit is joules per tesla, so these two units are equivalent to each other that are provided by 1 Ampere per square meter.The magnetic moment is a vector quantity. The objects have a tendency to place themselves in such a way that the magnetic moment vector becomes parallel to the magnetic field lines.