Final answer:
The net magnetic force on wire 1, caused by the interaction with wires 2 and 3, will be to the left. This is determined using the right-hand rule for magnetic fields and forces between currents flowing in the same direction, which results in attraction.
Step-by-step explanation:
The student is asking about the direction of the net magnetic force on wire 1 due to its interaction with two other currents. This question is related to the magnetic force between parallel current-carrying wires, according to Ampère's force law. For two currents flowing in the same direction, the wires will be attracted to each other. Therefore, wire 2 will exert a force toward wire 1. Since wire 3 has a current flowing in a perpendicular direction to wire 1, it will not exert any direct linear magnetic force on wire 1, but could potentially create a torque.
Using the right-hand rule, you can determine the direction of the magnetic fields and the resulting forces. As both wire 1 and wire 2 have currents flowing out of the page (along the positive z-axis if we consider them to be in the x-y plane), the magnetic field due to wire 2 at the location of wire 1 will be directed towards the left. Consequently, wire 1 will experience a force in the direction of this field, which is to the left.
Therefore, the answer to the student's question is that the net magnetic force on wire 1 will be to the left, which corresponds to option A.