99.29: Two light wires are hung vertically. With electrical current in both wir8x1tdfnrq wu 2).bz-keoy1 eq/( x5 fbes directed q- xn t/25xf wfuok11d( eb)qe.ybz8r upwards

  94.29: Four infinitely long wires are arranged as shown in the accompanying fie7 m *yy. wn)3uj. d4f(whour 4emwyw9gure’s end-on view. All four wires are perpendicular to the plane of the page and have the same magnitude of current I. The conyw9( 3yj4 wnmw yde) uho7w *.re4mu.fventional 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 elb4a.cuy-z4,4h2p h i 5z u3reanud9 mj52atoxectric currents in the same direction as shown in the diagram. How does the magnitude of the force on A from B compare z2e4z,.t 9u2 axob-5raciu nud jhpm a 3y4h45to the force on B from A?

  06.37: For the four identical current-carr i7et0*h1g glj5 ,yzagying wires shown (with conventional current coming out of the plane of the page), the wirez1ga t, hj eg75yilg0* 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 carrying lvj9o r. hvpn2 3ve2+/z1crs xcurrent i in a uniform magnetic field. An arrow indicates the magnetic force F on the wire. Of thlcj9+v /2nzv1r rx .3hveop 2se following possibilities, the direction of the magnetic field must be