Which of the following is a valid SI unit for | vedclass

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(A) The magnetic moment $M$ can be defined in two primary ways:$1$. For a current loop, $M = I \cdot A$, where $I$ is current $(A)$ and $A$ is area $(

Vedclass · Accepted Answer

$A \cdot m^2$

Vedclass · Answer

(A) The magnetic moment $M$ can be defined in two primary ways:$1$. For a current loop, $M = I \cdot A$, where $I$ is current $(A)$ and $A$ is area $(m^2)$. Thus, $M$ has units of $A \cdot m^2$.$2$. For a magnetic dipole in an external magnetic field $B$, the potential energy $U$ is $U = -M \cdot B$. Thus, $M = U / B$. The unit of energy $U$ is Joule $(J)$ and the unit of magnetic field $B$ is Tesla $(T)$. Therefore, $M$ has units of $J \cdot T^{-1}$.Since $A \cdot m^2$ is equivalent to $J \cdot T^{-1}$, both are valid units. Given the options, $A \cdot m^2$ is the standard unit.

Which of the following is a valid $SI$ unit for magnetic moment?

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