99.29: Two light wires are h2 6rase,,)tlyz(ia1a pbsuqx-u5 g)s ung vertically. With electrical current in both wires directed 6zxu)pq ais,,( y)- sb1 5augsarl2teupwards

  94.29: Four infinitely long witua dn6q,qgg n1r 5*m8res are arranged as shown in the accompanying figure’s end-on view.agd,6q5g nt8m1* urqn 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 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 differe: f 6nr1e6gljrnt electric currents in the same direction as shown in the diagram. How does the magnitude of the force on A from B comparerfr6nl1j6 g: e to the force on B from A?

  06.37: For the four identical current-carrying wires shown (wi: *gnxhgca.;dth conventional curr;g*:dx g nach.ent 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 from the other wires?

  05.22: The diagram below shows8qx uh*bevqq 2ags,:l)k gp6g/r 1fo2 a straight wire carrying current i in a uniform magnetic field. An arrow indicates the magnetic force F on the wire. Of the following possibilities, the direction of g x)sbpqqrhg , qfe*:kv8o 2/61 ulg2athe magnetic field must be