The direction of the magnetic force, F acting on the wire can be determined by using Fleming’s left hand rule.
- The straight lines with arrows show the direction of the magnetic field between the north and south poles.
- The circular lines with arrows show the direction of the magnetic field of the current.
- When the two fields are in the same direction and they produce a stronger combined magnetic field.
- When the two fields act in opposite directions and they produce a weaker magnetic field.
- Interaction between the magnetic fields produce a catapult field. Thus, the wire carrying current experiences a resultant force in the direction from the stronger to the weaker magnetic field