Final answer:
The net force exerted by the wire on loop AA depends on the direction of the current in the wire and the magnetic field. If the current is decreasing and the magnetic field is directed into the page, the net force will be upward on loop AA.
Step-by-step explanation:
The net force that the wire exerts on loop AA depends on the direction of the current in the wire and the direction of the magnetic field.
If the current is decreasing, the direction of the net force can be determined using the right hand rule.
If the current is decreasing and the magnetic field is directed into the page, the net force will be upward on loop AA.
This is because the magnetic field exerts a force on the current-carrying wire in a direction perpendicular to both the current and the magnetic field.