99.29: Two light wires are hung vertically. With electrical c ;.bhix ;5hnu,u0psr)g3cvz turrent in both wires direct r5u ;p,);zn3x0gbhvcish ut .ed upwards

  94.29: Four infinitely long wires are arranged as shown in the accompanying fs5o y40clhdr- lq +ze*igure’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* ly +zs-rdhoe5q lc04 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 differentqfrss72a /ytcl92e6 b electric currents in the same direction as shorle a27 f/2cy96sb qtswn 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 conve2 mxvno2p-x( wqf/t)nntional 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 the wire labeled P frpf2n/w(n2 vtxmo-qx )om the other wires?

  05.22: The diagram below shows a straigcvp jn5itkl2:*;pix5,7fibi6lcj o )ht wire carrying current i in a uniform magnetic field. An arrow indicates the magi 72cc5j* bn tx6;ipf vjo)lik:,5iplnetic force F on the wire. Of the following possibilities, the direction of the magnetic field must be