99.29: Two light wires are hung vertically1pvi/; vsd: n o fbtbrdl9,/4v. With electrical current in both wires directed uv fb / olpdrd/v1i;n: sb,94tvpwards

  94.29: Four infinitely long wires are tjd:i l+ 55k0n+b/ epy 872gzjkye pjtarranged 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 direct +8yzkde0i /7:jbp t52gntj 5ejyplk+ed 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 different electric currents in the samemj7reu7m6vn ; ;korm:ly /.+ dzun m-w direction as shown in the diagram. ;.;we:-zk77mdro mj6nnlm+ vr yu/m uHow 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 conventionaf r6 r:;:fr2hs qv -qia)hvj2il current coming out of the plane of the page), the wire on the right is labeled P. What is the direction of the magneh:i rqfrr2: ; v)6 h-sv2qfiajtic force on the wire labeled P from the other wires?

  05.22: The diagram below shows a straight wire carrying currenx 3nrm4b0c ure2 w87xut i in a uniform magnetic field. An arrow indicates the magnetic force F on the wire. Of the following possibilities, the direction of the 42reuxnxb 7m8 uw3r0 cmagnetic field must be