99.29: Two light wires are hung vertically. With electrical current in i5rhab8 ,,ziyboth wires directed u 8b ,y,haiizr5pwards

  94.29: Four infinitely longid2,w9u iv8 ha wires are arranged as 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 conventiowi adh2vi u,89nal 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 oz pn*d y0kih;v*,l- qcurrents in the same direction as shown in the diagram. How doesy v* ;oz0l*k,i phnqd- 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 (yam/x m3,z)(p 58w mkkvyv3bolwmx .6with conventional current coming out of the plane of the page), the wire on the right is labeled P. What is the mp6)(v, k3xwvm3al.bxk8ymy 5 /zow m direction of the magnetic force on the wire labeled P from the other wires?

  05.22: The diagram below s kxi3 5-psum othn2,1khows a straight wire carrying current i in a uniform magnetic field. An arrow indicates the magnetic force F on the wire. Of the following po moh s-3 5ptux,2i1knkssibilities, the direction of the magnetic field must be