99.29: Two light wires are hung vertically. With ele.p vr,3fows+ w/ ua:iictrical current in both wires directed upwaa+ oi. /irfvs:up, ww3rds

  94.29: Four infinitely*s2w2sjnpf,5ks; s)wn;ir n7 a +kejv long 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 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 forvij s)n22f ;ssap7n;sj e+,wkkw *5 nur wires. What is the total magnetic field at point P?

  03.30: Two parallel wires are carrying different electric currents in the syem. uhq9c . 8jgm -dv04*vwkxame direction as shown in the diagram. How does the magnitude of the force on A from B compare to the force on B vkm x hqem9j-u8* w.0gc.v yd4from A?

  06.37: For the four identical current-carrying wires shown (with conk:/o +i/i jeixventional current coming out of the plane of the page), the wire on the right is labeled P. What is the direk/iji:/ +e xioction of the magnetic force on the wire labeled P from the other wires?

  05.22: The diagram belowf*d4 a4n5ag w0xcg8-0z klxn s shows a straight wire carrying current i in a uniform magnetic field. An arrow indicates the magns5zngd 0 4-ga0axn wc*kfl4x8etic force F on the wire. Of the following possibilities, the direction of the magnetic field must be