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(i) Write the expression for the magneti...

(i) Write the expression for the magnetic moment `(vecm)` due to a planar square loop of side 'l' carrying a steady current I in a vector form.
(ii) In figure., this loop is placed in a horizontal plane near a long straight conductor carrying a steady current `I_1` at a distance l as shown. Give reasons to explain that the loop will experience a net force but no torque. Write the expression for this force acting on the loop.

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