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(B) The magnetic field $B$ produced by the long wire carrying current $I$ is directed into the page (inward) in the region of the loop. As the loop is

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$b$. Clockwise,To the left,To the right

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(B) The magnetic field $B$ produced by the long wire carrying current $I$ is directed into the page (inward) in the region of the loop. As the loop is pulled to the right,it moves into a region where the magnetic field strength decreases,thus the magnetic flux through the loop decreases.According to Lenz's law,the induced current in the loop will flow in a direction to oppose this decrease in flux,which means it will create its own magnetic field directed into the page. By the right-hand rule,this corresponds to a clockwise induced current.For the left side of the loop (closest to the wire),the current flows upward,which is in the same direction as the current $I$ in the long wire. Parallel currents attract,so the force on the left side is directed towards the long wire (to the left).For the right side of the loop,the current flows downward,which is opposite to the current $I$ in the long wire. Anti-parallel currents repel,so the force on the right side is directed away from the long wire (to the right).

$A$ rectangular loop of wire is coplanar with a long wire carrying current $I$. The loop is pulled to the right as indicated. What are the directions of the induced current in the loop and the magnetic forces on the left and the right sides of the loop?

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