99.29: Two light wires are hung vertically. W :*dl* ar0 dlma-(o-je0p+yufw hc.rvith electrical current in both wires0-:*rddvmo(*hc -wr lpaa.ejul0y+f directed upwards

  94.29: Four infinitely long wires are arranged asdm5 ngr-ceiju,o*)t ; shown in the accompanying figure’s end-on view. All four wires are perpendicular to the plane of the page and have the same magnitude of current I. The conventional current in the wire in the upper right-hand corner is directed into the plane of the page. The other co-;udnjr t , o5m)eg*cinventional currents are out of the plane of the page. Point P is a distance a from all four wires. What is the total magnetic field at point P?

  03.30: Two parallel wires are carrying diffefklc xz8yq ,ap6 0*zz7rent electric currents in the same direction as shown in the diagram. How does the magnitude of the force on A from B compare to the forccxf kpz*0 7,qy8z lza6e on B from A?

  06.37: For the four identical current-carr2rq d+zea)wt ho z--2xying wires shown (with conventional cue)zt2o- xa+-wr 2qdhzrrent coming out of the plane of the page), the wire on the right is labeled P. What is the direction of the magnetic force on the wire labeled P from the other wires?

  05.22: The diagram below shows a straight wire carr44ov6 j l8qykmying current i in a uniform magnetic field. An arrow indicates the magnetic force F on vqjm 4ylk8o4 6the wire. Of the following possibilities, the direction of the magnetic field must be