Question

A bar magnet has a magnetic moment of $10 \, \text{A} \, \text{m}^{\text{2}}$ . If its magnetic length is $5 \, \text{cm}$ , Its pole strength is

• A. $200 \, \text{A} \, \text{m}$
• B. $100 \, \text{A} \, \text{m}$
• C. $300 \, \text{A} \, \text{m}$
• D. $50 \, \text{A} \, \text{m}$

Answer 1

Answer: (A)

$m =\frac{M}{l}=\frac{1 0}{0 \text{.} 0 5}=200Am$