99.29: Two light wires are hung vertically. With elece vu utp a3toz0ha ki+s85ug):as3 w2(trical current in both wires directed upw: u+a 5( 38wts0 vukou3htgsepza)ai2ards

  94.29: Four infinitely long wires are arranged as shown in thev4p .q(9lkplg accompanying figure’s end-on view. All four wires are perpendicular to the plane of the page and.4 g9lvpplqk( 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 arez vv4/6d5 klme carrying different electric currents in the same direction as shown in the diagram. How does the magnitude of the for4ve m/v6 zl5kdce on A from B compare to the force on B from A?

  06.37: For the four identical current-carrying w-m h:v5we zg8dn pmb5.ires shown (with conventional current coming out of the plane of the page), the wire on the right is labeled P. What is the n5 e 8gpmb5mh.z-v:d wdirection of the magnetic force on the wire labeled P from the other wires?

  05.22: The diagram below shows a straight wire carrying cur-uaeakqc int8/3 gr2jw 8tk2 3rent i in a uniform magnetic field. An arrow indicates the magnetic force F onqr3a 823w nk8keuc-/2tag tij the wire. Of the following possibilities, the direction of the magnetic field must be