99.29: Two light wires are hung vertically. With uzxi 6e:f jr/+electrical current in both wires directed up /xu:z+irfje6wards

  94.29: Four infinitely long wires are arranged as shown z)5c -snp6 -42.vrsr ppviqvsux0r/ bin the accompanying figure’s end-on view. All four wires are perpendicular to the planebss -x)650v. pvs /pu4 ri2 rpczv-rqn 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 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 different electric currents in the same d nk3st2y:kev +irection as shown in the diagram. How does the magni3nvt2 :+kk esytude of the force on A from B compare to the force on B from A?

  06.37: For the four identical current-carrying wika4ygqty mtu w,79*z .res shown (with conventional current coming out of th 4m.7gw,ttkyz9uqya* e 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 carrymgyzx4ub 1*1 ke fx,lg* y.o0sing current i in a uniform magnetic field. An arrow indicates the magnetic force F on the wire. O fg1s,yglxm.*k0xyou b*4z1 ef the following possibilities, the direction of the magnetic field must be