### Induction

A wire is bent into three circular segments of radius *r* = 10.4 cm, as
shown in Fig. 34-55 below. Each segment is a quadrant of a circle, *ab* lying in the *xy*
plane, *bc* lying in the
*yz* plane, and *ca* lying in the *zx* plane. (a) If a uniform magnetic field **B**
points in the positive *x* direction, find the emf developed in the wire when *B* increases at the
rate of 3.32 mT/s. (b) What is the direction of the
current in the segment *bc*?