With the help of which law the direction of a magnetic field can be decided?

According to Right-hand thumb rule when we arrange our right-hand thumb in the direction of the current and as we wrap our finger around the current carrying conductor, the wrapped finger will show the direction of the magnetic current. This law helps in finding the direction of the magnetic field from a current carrying conductor. This law also implies that magnetic field and current will always be perpendicular.

While Fleming’s right-hand rule helps to find out the direction of the induced magnetic current. And Fleming’s left-hand rule helps to find out the direction of the magnetic force.