[填空题]
Calculate the magnitude of the magnetic force on a 160-mz+u6ufnu8 eu / length of straight /i 5q)fisg+ek 2csk4q wire stretched between two towers carrying a 150-A cu+ 24ksqsef /5) qigcikrrent. The Earth’s magnetic field of $ 5.0\times10^{-5 }\;T$ makes an angle of 65$^{\circ}\,$ with the wire. N
