Question

A bulk magnetic material has volume \[ 2\,\text{m}^3 \] and its magnetization is found to be \[ 2\,\text{A m}^{-1}. \] Then the magnetic moment of the bulk material is

• A. \[ 1\,\text{A m}^2 \]
• B. \[ 4\,\text{A m}^2 \]
• C. \[ 2\,\text{A m}^2 \]
• D. \[ 8\,\text{A m}^2 \]

Hint:

Remember: \[ \boxed{M=\frac{\text{Magnetic Moment}}{\text{Volume}}} \] Hence, \[ \boxed{\text{Magnetic Moment}=M\times V}. \] Units: \[ M \rightarrow \text{A m}^{-1}, \qquad m \rightarrow \text{A m}^2. \]

Answer 1

The Correct Option is B