99.29: Two light wires are hung verticallzay0qpe+pr,/lx 6;vgn +g:z cy. With electrical current in both wires directed upwazqxap+l6/ yg:;0,z nergcv+ p rds

  94.29: Four infinitely long wires aq w.y vqlo/b01re 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. Thevowqb1qyl 0./ 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 dkye1kdv1s. ) qsk3ri v :fc7w2ifferent electric currents in the same direction as shown in the diagram. How does the magnitude of the force on Avrf .e1v3sk k2 :) qwkd7iysc1 from B compare to the force on B from A?

  06.37: For the four identical current-carrying wires shown (with conven6klu3 ur mdl1*i 5)hkctional current coming out of the plane of the page), the wire on the right is labeled P. What is the direction of tc5 d3rh) 6lm*k1ikul uhe magnetic force on the wire labeled P from the other wires?

  05.22: The diagram below . ;c7g:ir; 0ppot xs2ke,mtiushows a straight wire carrying current i in a uniform magnetic field. An arrow indicates the magnetic force F on the wire. Of the following possibilities, the diktmu.2ox :eip;r0pg ,cist; 7rection of the magnetic field must be