99.29: Two light wires are hung vertif nj4-6rbpk 2d-jql p8cally. With electrical current in both wires directed upwardj4b86lrp- fnpdq kj -2s

  94.29: Four infinitely long wires are arranged as shown i /r4esf h 72p6;detwlo+trya)n the accompanying figure’s end-on view. All four wires are perpendicular to the plane of the page and have the same magnitude of clef6 t) a y;wt/+he2rsr7pdo4urrent 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 di .h 6khumtrnp) fmg1c4my+f2;fferent electric currents in the same direction as shown in the diagram. How does the magnitude of the force on A from B compare to the force on B fr64 hgfmcmk1;fr.phu2t yn)+ mom A?

  06.37: For the four identical current-carrying wires shown (with con ;a vaiemv/hq89heic u; 4er55ventional 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 th;9er5/45 a quhm;8eiih v ecave wire labeled P from the other wires?

  05.22: The diagram below shows a straight wire 3:mv zwb:wn4f(,kfov jw4 p: xcarrying current i in a uniform magnetic field. An arrow indicates the magnetic force F on the wire. Of the following possibilitiew4v ff k4vwjxwm,:o b z:p:(3ns, the direction of the magnetic field must be