99.29: Two light wires are hung vertically. Witkckqb 909g s+sh electrical current in both wires direct9 sc q+kbk0s9ged upwards

  94.29: Four infinitely long wires are arranged as shown in the accompanying filwes (y v;f6n6kqj b1cz *3m2xgure’s end-on view. All four wires w31vz2fy lnes(c6x ;q jbmk6*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 four wires. What is the total magnetic field at point P?

  03.30: Two parallel wires are carrying difnxtdn(fu r :;1 yij1q9ferent electric currents in the same direction as shown in the diagram. How does the magnitude of the force on A fnnd:f(y1x 9;r1ju qtirom B compare to the force on B from A?

  06.37: For the four i56qi5b aw .uyql5/l-tkc: yj qdentical current-carrying wires shown (with conventional current coming out of the plane of the page), the wire on the right is labeled P. What is the direction of the magnetic force on the wire labeled P from the other.b:5aqq5yi5lukwq/6y t jc-l wires?

  05.22: The diagram below shows a straight wire carrying current i in aly81ft2qsu qjr 8 p*1b uniform magnetic field. An arrow indicates the magnetic force F on the wire. Of the folloqr1u sp bq* y8ljtf218wing possibilities, the direction of the magnetic field must be