Question 301: Magnetism and Matter

Question

Two short magnetic dipoles m1 and m2 each having magnetic moment of 1 Am2 are placed at point O and P respectively. The distance between OP is 1 meter. The torque experienced by the magnetic dipole m2 due to the presence of m1 is ........... $$	imes$$ 10$$-$$7 Nm.

Accepted Answer

$$\overrightarrow 	au   = \overrightarrow {{M_2}}  	imes \overrightarrow {{B_1}} $$
$$	au  = {M_2}{B_1}\sin 90^\circ $$
$$ = 1 	imes {{{\mu _0}} \over {4\pi }}{{{M_1}} \over {{{(1)}^3}}}1$$
= 10
$$-$$7
N.m

Magnetism and Matter

Two short magnetic dipoles m1 and m2 each having magnetic moment of 1 Am2 are placed at point O and P respectively. The distance between OP is 1 meter. The torque experienced by the magnetic dipole m2 due to the presence of m1 is ........... $\times 10-$7 Nm.

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