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Q.

A square loop, carrying a steady current I, is placed in a horizontal plane near a long straight conductor carrying a steady current I1 at a distance d from the conductor as shown in figure. The loop will experience Question Image

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a

a net torque acting upward perpendicular to the horizontal plane 

b

a net attractive force towards the conductor

c

a net torque acting downward normal to the horizontal plane

d

a net repulsive force  away from the conductor

answer is D.

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Detailed Solution

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Given Data:

A square loop, carrying a steady current I, is placed in a horizontal plane near a long straight conductor carrying a steady current I1 at a distance d.

Detailed Solution:

F1>F2 as F1d, and F3 and F4are equal and opposite. Hence, the net attraction force will be towards the conductor.

Hence, the correct option is D.

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