When a coil of area Ā carrying current i is suspended in a magnetic field of induction then the torque on the coil is 1) (Āx B) 2) i (A-B)3) i (Ax B) 4) A(ixB)
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Torque on magnetic dipole, i ^ (A×B)
where i is current
A is area vector normal to the area surface
B is magnetic field
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