[填空题]
A long horizontal wire carries a current of 48 A.yrz 8m 5gk7az7 aoy0yc1 7tws, A20 s 3d*yq*-ifr jlpno second wire, made of 2.5-mm-diameter copper wire and parallel to the first, is kept in suspension magnetically 15 cm below (Fig. fnr*o2 pdl*0y sij- q3Below).
(a) Determine the magnitude and direction of the current in the lower wire. A the current is to the
(b) Is the lower wire in stable equilibrium?
(c) Repeat parts (a) and (b) if the second wire is suspended 15 cm above the first due to the latter’s field.
参考答案: 空格1: 6700±2%
空格2: right
空格3: not in stable equilibrium
