[填空题]
Calculate the magnits;e2 zp gndu mpjx/n0moeme i *74e1;2ude of theurg3 vz0 i1ia l,*rx-q magnetic force on a 160-m length of straight wire stretched b103lxg a zqr-vu*i,r ietween two towers carrying a 150-A current. The Earth’s magnetic field of $ 5.0\times10^{-5 }\;T$ makes an angle of 65$^{\circ}\,$ with the wire. N
