99.29: Two light wires are hung vertically. With electrical currenf kpnaw86p tb6sn,3o*t in both wires directedf3 *pw 8ptn66kbo,nas upwards

  94.29: Four infinitely long wires are au1sax tn (a m,b1sye-8rranged 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 m,auy a11 b-s(8xemsntagnitude 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 in kzclpaq ;pmp6w 9*m;0the same direction as shown in lp pwzap;* ;c09qm m6kthe diagram. How does the magnitude 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 (6o7pdj 7l4cr g,hfw i5with conventional current coming out of the plane of the page), the wire on the right is labegrwfd l c7oip6jh57 ,4led P. What is the direction of the magnetic force on the wire labeled P from the other wires?

  05.22: The diagram bnq)g0- 4ekjs8l -9 gdxjkvy0 helow shows a straight wire carrying current i in a uniform magnetic field. An arrow indicates the magnetic force F on the wire. Of)g9j- 0qhnlekd 8y-g4svxj k0 the following possibilities, the direction of the magnetic field must be