The diagram shows concentric field lines of the magnetic fields of two parallel current-carrying conductors. The right-hand current goes into the plane of the diagram and the left-hand current goes out of the plane of the diagram. The currents have the same magnitude as each other. The increase in the radius of the concentric field lines is constant, and the strength of a magnetic field at a point around a current is inversely proportional to the perpendicular distance of the point from the current.
Which of the following lists of the points shown in the diagram correctly orders the points from the greatest to the smallest magnitude of net magnetic field?
Two long, straight, parallel conducting wires are separated by distance , as shown in the diagram. The wires both carry 1.2 A currents in the same direction. What is the magnitude of the force that a length of each wire exerts on the other? Use a value of H/m for the magnetic permeability of the region between the wires.
Several horizontal pairs of parallel conducting wires are stacked vertically. The magnitude of the current in each wire is the same. A cross section of the resultant magnetic field due to the currents is shown in the diagram. Which of the configurations of current directions shown would produce the resultant magnetic field?