99.29: Two light wires are hung vertically. With electrical current in both wcaaco)ni +q+v/ e5+ lwires directed upwa+enl iqcc)v/w5ao a++ rds

  94.29: Four infinitely long wires are arranged as shown inqrm-ywk hy/ mv9-mf /4 the accompanying figure’s end-on view. All four wires are perpendicular to the plane of the page and have the same magwr mvkf-y/h-m/4 qym9 nitude 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 dif(cd;: ct8cwnd n-4c(ji s xb-qferent electric currents in the same direction as shown in the diagram. How does the magnitude of the force on A from B compare to th:-c4- dq xc(jdi8(t swcb;nnce force on B from A?

  06.37: For the four identical current-carrying wires shown (iibu1-s2 bfbjr x 8hzpvl5s *p7t 1r-;ild;e 3with conventional current coming out of the plane of the page), the wire on the right is labeled P. What is the direction of th upl2fdx-735j re ;rizlp1 svh8tib;bb is*1-e magnetic force on the wire labeled P from the other wires?

  05.22: The diagram below shows a straight ,k c1h)24aybp jln8pv wire carrying current i in a uniform magnetic field. An arrow indicates the magnetic force F on the wire. Of the following possibilities, the direction of the magnetic f,kc py8h) 1 vjbp4n2alield must be