Chapter 31
62.  5.58 A
66.  (a) 1.26 mT  (b) 0.628 J/m³
Chapter 32
30.  750 kV/s
32.  7193 GV/(ms)
34.  (a) 21.2 nA down  (b) CW from above
38.  (a) (4/3) A  (b) at R/4 and at 4R
Chapter 33
Q4.  (a) L2 > L1   (b) I1 > I2  (you must explain why)
Q6.  (a) decreases (b) stays the same  (you must explain why)
2.   45.2 mA
4.   (a) 6 microseconds (b) 167 kHz   (c) 3 microseconds
8.   37.8 microH
10.  proof
12.  (a) 3.6 mH  (b) 1326 Hz  (c) 189 microseconds
16.  (a) Q/2     (b) (sqrt3/2)I
32.  0.6 A for all frequencies
34.  (a) 5.22 mA  (b) zero    (c) 4.52 mA
36.  (a) 39.1 mA  (b) zero    (c) -33.9 mA
44.  (a) 16.6 Ohms  (b) 422 Ohms  (c) 521 mA
     (d) 33.2 Ohms  (e) 408 Ohms  (f) 539 mA
48.  (a) 796 Hz     (b) same      
     (c) decrease   (d) increase
50.  100 V  (you must carefully explain why)
52.  (a) taking energy    (b) supplying energy
54.  proof plus explanations for limiting cases
60.  (a) 76.4 mH  (b) yes; 17.8 Ohms; resistor would 
                      consume energy, not store it
G1.  proof
G2.  proof
G3.  proof
G4.  proof
Chapter 34
Q2.  into the page
2.   (a) 4.71 mHZ  (b) 212 s
6.   4.74 m
14.  1.19 MW/m²
16.  Bmax = 3.42 microT; Emax = 1.03 kV/m
34.  4.55 x 10^-4
38.  19.0 W/m²
40.  (a) 15.9%  (b) 84.1%