Question

Two small magnets each of magnetic moment $10$A-$m^2$ are placed at a separation of $0.1$m as given in the diagram. The force between them is?

• A. $0.2$N
• B. $0.3$N
• C. $0.6$N
• D. Zero

Answer 1

The correct option is C $0.6$N

option B

$F=\frac{{\mu }_0}{4\pi }\frac{6M_1{M}_2}{d^4}$

$F={10}^7\times \frac{6\times {10}^2}{{\left(0.1\right)}^4}=0.6N$