A magnet of magnetic moment $50 \hat i\, Am^2$ is placed along the $x-$ axis in a magnetic field $\vec B = (0.5\hat i + 3.0\hat j)\,T$. The torque acting on the magnet is
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Magnetic field $\vec{B}=0.5 \hat{i}+3.0 \hat{j} T$
Magnetic moment $\mu=50 \hat{i} A m^{2}$
Torque on magnet $\tau$
$\tau=\mu \times \vec{B}=50 \hat{i} \times(0.5 \hat{i}+3.0 \hat{j})$
$\tau=150 \hat{k} N-m$
Hence, Torque experiences by the magnet present in the magnetic field,
$\tau=$ $150 \hat{k} N-m$
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