99.29: Two light wires are hung vertic lv)d1 zvl40tzx ra;*kally. With electrical current in both wiresz );1*0dvtakxl4 lv zr directed upwards

  94.29: Four infinitely long wir4s obdimg8iz,i-sq); dwj(+wfcew 9v- /t gs2es are 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. The other conventional currents are out of the plane of the page. Point P g ,8 +i)cves-9o 4wds-qmbjsi d/ 2wif;zg( twis a distance a from all four wires. What is the total magnetic field at point P?

  03.30: Two parallel wireg i 3d74nsmxe5 5-bzxss are carrying different 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 f3xxe4 sm b5disg-7n z5rom A?

  06.37: For the four identical currxmc-otdrd ;75hw0 o+ ient-carrying wires shown (with conventional curren - dxtd75i; o+hrcw0omt 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 from the other wires?

  05.22: The diagram belyk92ychudg7u*x )nt8q8qp2h ow shows 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, t2*qc7kuy p8 xghyn) tdhu 8q92he direction of the magnetic field must be