99.29: Two light wires are hung vertically. With electrical current in boths(h/wp1x,2j9 tew n9m gdiir / wires directed upwardt(xjww/29 rm i9, hnegd/i1pss

  94.29: Four infinitely long wires areqrw(v -i)n7cndlm6t+ arranged as shown in the accompanying figure’s end-on view. All four wires are perpendicular to the plane of the rc n-v7tdnq m+ilw6() 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 different electric currents) j8-yc;i(loxk) v -fn odgxjofg-+w7 in the same direction as shown in the diagram. How does the magnitk -lx-oiv- y ) fj;jofwonx7)c(dgg 8+ude of the force on A from B compare to the force on B from A?

  06.37: For the four identical current-carrying wires shown (with conventiovdg1/kj r3l 4zioy. 1g 8nufo7nal current coming out of the plane of the page), the wire on thedi fl7n43 j8k1oovr zgyg/ u.1 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 strafu*i86 w- qd72pixov 6 ej-waaight wire carrying current i in a uniform magnetic field. An arrow indicates the magnetic force F on the wire. Of the following possibilities, the direction7- 6dp8v j a*xa2qeiwi-f6wou of the magnetic field must be