99.29: Two light wires are hung vertically. With electricaka( /hhuf :ck.l current in both wires .kh/khc( uaf: directed upwards

  94.29: Four infinitely long wires are arraae.g f du3j ncn;k.8.dnged as shown in the accompanying figure’s end-on view. All four wires are perpendicular to the plane ofn judag.df c3k ;..en8 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 carryinlvgj9 c60 (c/(vw5siurkdmi*ik vto4p*72q tg different electric currents in the same direction as shown in the diagram. How does the magnitude of the force on A from B compaod(p(kvcgc k i*v7 sti4 q 60viw*95/2u rjmtlre to the force on B from A?

  06.37: For the four identical current-carrying wij1o.bznck g:m99c3mhoh,is 2p tb)f82qnmo3res shown (with conventional current coming out of the plane of the page), the w jcb.3, mmb q 3 29tci8ng: o9zh)2ok1omhpfnsire on the 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 straight wire catqm v40wli 7r+nv ;b)-up(qmarrying current i in a uniform magnetic field. An arrow inv-7+qpl r 0wau mm)vb(in;q t4dicates the magnetic force F on the wire. Of the following possibilities, the direction of the magnetic field must be