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QJEEM21Pheb99: JEE Main 2021 Physics - Class 12 JEEM21Pheb99 Solution: Two short magnetic dipoles m 1 and m 2 each having magnetic…

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.

JEE Main 2021 (Online) 26th August Morning Shift Physics - Magnetic Effect of Current Question 111 English

Step-by-Step Verified Solution

τ→=M2→×B1→\overrightarrow \tau = \overrightarrow {{M_2}} \times \overrightarrow {{B_1}}

τ=M2B1sin⁡90∘\tau = {M_2}{B_1}\sin 90^\circ

=1×μ04πM1(1)31= 1 \times {{{\mu _0}} \over {4\pi }}{{{M_1}} \over {{{(1)}^3}}}1

= 10 −- 7 N.m

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