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(A) When a flexible current-carrying loop is placed in an external magnetic field,every infinitesimal segment $(d\ell)$ of the wire experiences a magn

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Loop assumes circular shape with its plane normal to the field.

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(A) When a flexible current-carrying loop is placed in an external magnetic field,every infinitesimal segment $(d\ell)$ of the wire experiences a magnetic force given by $dF = i(d\ell 	imes B)$.This force acts perpendicular to both the current direction and the magnetic field.Due to the symmetry of the magnetic force acting radially outward (or inward depending on the current direction),the wire experiences a uniform tension that forces it to expand into a circular shape to maximize the area enclosed by the loop,with its plane oriented normal to the magnetic field lines.

$A$ loop of flexible wire of irregular shape carrying current is placed in an external magnetic field. Identify the effect of the field on the magnetic force acting on the wire.

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