a) emf is maximum when sin(wdt - pi/4) = 1
318t - pi/4 = pi/2
t = 0.75 pi/318 = 0.00741 s
b)current is
maximum when sin(wdt - 3pi/4) = 1
318t - 3pi/4 = pi/2
t = 1.75 pi/318 = 0.0173 s
c) it is inductor since current is lagging
d) XL =31.5/0.732 =43.033
L = 43.033/wd = 43.0327/318 = 0.135 H
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