Subjective Type

Find the dimensions of magnetic dipole moment M. The defining equations are $$p=q.d$$ and $$M=IA$$; where d is distance, A is area, q is charge and I is current.

Solution

The magnetic moment is defined as the product of the current and the area through which the current pass.

Magnetic dipole moment $$M=IA$$

Substitute the respective dimensions in the expression
$$=[I][L^2]$$
$$=[L^2I]$$

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