[填空题]
A jumper cable used to sta*dw/x hm- /lq-io-s+ wl,ucmart a stalled vehicle carries (9mf2gd rb ujktedo : ,+3ga*ga 65-A current. How strong is the magnetic field 6.0 cm away from it? Compare to thegdgkgt :(am* r2e+d,f9 buo3j Earth’s magnetic field. $B_{cable}$ $ \times10^{-4 }\;T$ the field of the cable is about times that of the Earth.
