Answer
(a) Counter-clockwise
(b) Clockwise
(c) The loop will not rotate.
Work Step by Step
(a) We know that the force on the left vertical wire is out of the page, the force on the right vertical wire is into the page, and the horizontal wire experiences zero force. Thus, the loop tends to rotate counter-clockwise as viewed from above.
(b) We know that the loop tends to rotate clockwise.
(c) We know that in this case, the loop will not tend to rotate at all.
