Two large metal sheets carry surface currents as depicted in the figure. The current through a strip of width dl is K , dl , where K is a constant. Determine the magnetic field at the points P , Q , and R .

Step-by-step solution

The magnetic field due to a large infinite metal sheet carrying a surface current density K is uniform and its magnitude is given by B = ₀ K 2 . For the top sheet, the current is coming out of the plane of the paper. By the right-hand thumb rule, the magnetic field produced by it is directed towards the left above the sheet and towards the right below the sheet. For the bottom sheet, the current is going into the plane of the paper. The magnetic field produced by it is directed towards the right above the sheet and