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  4. A magnetic field is produced and directed along y-axis. A magnet is placed along y-axis. The direction of torque on the magnet is

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Q. A magnetic field is produced and directed along y-axis. A magnet is placed along y-axis. The direction of torque on the magnet is

Moving Charges and Magnetism

Solution:

$\tau=\vec{ M } \times \vec{ B } $
$\hat{ i } \times \hat{ j }=\hat{ k }$
The direction of torque will be always $Z-$ axis $(+$ ve $)$