Q. 23. [Robbins and Miller] If the period of the waveform in
Figure 15-82 is 180 ms, compute current at 30, 75, 140, and
315 ms. [43.3 A; 25 A; -49.2 A: -50 A]
Q. 29. [Robbins and Miller] Determine equations for sine waves with the following:
a. $V_m = 170$ V, $f = 60$ Hz
b. $I_m = 40$ ?A, $T = 10$ ms
c. $T = 120$ ?s, $v = 10$ V at $t = 12$ ?s
[$a. v = 170 \sin \ 377t \text{ V}$
$b. i = 40 \sin \ 628t \text{ ?A}$
$c. v = 17 \sin \ 52.4 \times 10^3 t \text{ V}$]
