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 wire.
A
Loop assumes circular shape with its plane normal to the field.
B
Loop assumes circular shape with its plane parallel to the field.
C
Wire gets stretched to become straight.
D
Shape of the loop remains unchanged.
JEE MAIN 2021, Medium
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A
Loop assumes circular shape with its plane normal to the field.
a Every part $( d \ell)$ of the wire is pulled by force $i ( d \ell) B$ acting perpendicular to current $\&$ magnetic field giving it a shape of circle.
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