Answers to those Homework Problems that you must
write up and turn in at recitation (i.e. the HW
problems not on the Mastering Physics web site)
will be posted here.
P25. For both components, the magnitude turns out
     to be k(lambda)/R
E2.  (a) proof
     (b) V(rf)-V(ri)=(rho/4epsilon0)(ri²-rf²)
     (c) answer will be posted after this problem is due
     (d) answer will be posted after this problem is due
W68. (a) (pi/3)R²J_0
     (b) (mu0/6r)R²J_0
     (c) (mu0/2)rJ_0(1-(2r/3R))  sol
H12. (a) Pind = 3.11 W; Pres = 7.40 W; Pbat = 10.51 W
     (b) 18.7 J   (c) 5.10 J   (d) 13.6 J