[填空题]
The force on a wire carrying 8.75 6 al-tvwz758f ubr5 qqA ilx9i *onr 7 fg )kzx:cb-zbh6,*w9 zlhs a maximum of 1.28 N when placed between the pole faces of a magnet. If the pole faces are 55.5 cm in diameter, what is the approximate sb z, *b6czxwxnk h9:-lrh7 il )o*zg9ftrength of the magnetic field? T
