99.29: Two light wires f,o;0t5; azgy ew 2dhnare hung vertically. With electrical current in both wires directed 5h;o2,w f0aetg;ydzn upwards

  94.29: Four infinitely long wmnh 1f kz(,hn4ires 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 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 hz,1 nn(mh f4kthe page. Point P is a distance a from all four wires. What is the total magnetic field at point P?

  03.30: Two parallel wi5pmsl/2*wv6 jh u 4ron1rip:jres are carrying different 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 force on B from A?/ri25 1wv:j4romj6h* l nspup

  06.37: For the four identical current-carrying wires shown (with convent l,b +v9d bbl:yos9p;iional current 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 frbps,ybdvo +l 99:ilb;om the other wires?

  05.22: The diagram below shows a straight wire 4dsev)gu da7ju0*-0r(j ehi3ui 3utq carrying current i in a uniform magnetic field. An arrow indicates th ju(4 h teuu73d0ivgsi -adr) je3*0que magnetic force F on the wire. Of the following possibilities, the direction of the magnetic field must be