Question 315: Magnetism and Matter

Question

Two short magnetic dipoles m
1
and m
2
each having magnetic moment of 1 Am
2
are placed at point O and P respectively. The distance between OP is 1 meter. The torque experienced by the magnetic dipole m
2
due to the presence of m
1
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 m 1 and m 2 each having magnetic moment of 1 Am 2 are placed at point O and P respectively. The distance between OP is 1 meter. The torque experienced by the magnetic dipole m 2 due to the presence of m 1 is ........... $\times 10 -$7 Nm.

Integer / Numeric Answer Type