99.29: Two light wires are hung vertically. With electrical current in bo(6tx.a bvq x*nth wires directed upwar*6axq( nvt .bxds

  94.29: Four infinitely long wires are arranged as shown in the be*py jodckq62)2 2 8jh7pkryaccompanying 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 conventional j2de2k*p6o)yb kp78cy2r h jqcurrents 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 wire co t p4**f0s+vojz0bqs are carrying different electric currents in the same direction as shown in the diagzjvcf*so+tq p 40bo0*ram. How does the magnitude of the force on A from B compare to the force on B from A?

  06.37: For the four identical current-carrying wires shown n+* -f6ikd opg(with conventional current com*o-f ngd6ki p+ing 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 straigh1okpm : 6 slvki1bp)1yzj) r:yt wire carrying current i in a uniform magnetic field. An arrow indicates the magnetic force F on the wire. Of the followi16mkyi:kvp zs)r :ol)1 j yb1png possibilities, the direction of the magnetic field must be