[填空题]
Calculate the magnitude of the magneti3bl. h .r-tdxmrq(l- mc forgc6. wza c5;ou d3.ppzce on a 160-m length of straight wire stretched between two towers carrying a 150-A current. The Ea3;ocg u d paz65..pwzcrth’s magnetic field of $ 5.0\times10^{-5 }\;T$ makes an angle of 65$^{\circ}\,$ with the wire. N
