Two current-carrying wires perpendicular to each other, which region has the strongest magnetic field out of paper

Answer: Option A

When there is current flowing through the wire, there is magnetic field generated around the wire. To determine the direction of the magnetic field, we can use Right Hand Grip Rule (RHGR).

To help in the visualisation, we can also use the ‘dot’ and ‘cross’ to represent magnetic field coming out of the paper and into the paper respectively.