99.29: Two light wires are hung vertically. With electbur y14,ae ..m rloam-rical current in both wires directed e bryur 1-mma. 4oal.,upwards

  94.29: Four infinitely long wires are arranged as shown in the acco9q;zc 2 e rm-xh4rm5ixmpanying 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. The other conventional currents are out ofq 59-re mimh x;r42zxc 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 different electric .*s6vly htyt t0oj-*ok)ntkdat 587rcurrents in the same directio t)n8tj .rtvkkoty6so hlat0 *d 5-*y7n as shown in the diagram. How does the magnitude of the force on A from B compare to the force on B from A?

  06.37: For the four identical current-carrying wires shown (with conven7rctls5e)3ti x*-. go z7ofrstional current coming out of the plane of the page), the wire on the right is labeled P. What is the direction of the magneticcs oti57 tr 3.l7)ezsr*ogx- f force on the wire labeled P from the other wires?

  05.22: The diagram below shows a straight w 9; 9 qhmel5llp :xtrbl5izr4.5) zxlcire 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 field mt 5 .cl94l:x ;lrbz5xime9rpq l5lh )zust be