99.29: Two light wires are hung vertically. Witn nin,fi; 6nk-h mb:/ih electrical current in both wires direch -iknfnn6b; , :/inimted upwards

  94.29: Four infinitely longc6vpzyt7 o(b:) f3 cfajsoa, ; 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 af pvas 7) yozjfo:ctc,6;b3(from all four wires. What is the total magnetic field at point P?

  03.30: Two parallel wires are carrying different electj2n(xua 125faw q sh.nric currents in the same direction as shown in the diagram. How doe5unnh.w 1 ja qsa22xf(s 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 wiz(jnk /t c/n5rres shown (with conventional current coming out of the plane of the page), the wire on the right is l (nn /r/jtzc5kabeled P. What is the direction of the magnetic force on the wire labeled P from the other wires?

  05.22: The diagram bely wdr0- lzoxa-n/ (g(row shows a straight wire carrying current i in a uniform magnetic field. An arrow indicater(/wdzo ylga-(r nx 0-s the magnetic force F on the wire. Of the following possibilities, the direction of the magnetic field must be