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*33. The sinusoidal voltage v � 200 sin(2p1000t � 60°) is
plotted in Fig. 13.89. Determine the time t1. *34. The sinusoidal current i � 4 sin(50,000t � 40°) is plotted
in Fig. 13.90. Determine the time t1. v
200
t1 –p 0
60°
t1 p 2p t
FIG. 13.89
Problem 33.
*35. Determine the phase delay in milliseconds between the
following two waveforms:
v � 60 sin(1800t � 20°)
i � 1.2 sin(1800t � 20°)
36. For the oscilloscope display of Fig. 13.91:
a. Determine the period of each waveform.
b. Determine the frequency of each waveform.
c. Find the rms value of each waveform.
d. Determine the phase shift between the two waveforms
and which leads or lags.
SECTION 13.6 Average Value
37. For the waveform of Fig. 13.92:
a. Determine the period.
b. Find the frequency.
c. Determine the average value.
d. Sketch the resulting oscilloscope display if the vertical
channel is switched from DC to AC.
Vertical sensitivity = 10 mV/div.
Horizontal sensitivity = 0.2 ms/div.
FIG. 13.92
Problem 37.
i
4A
PROBLEMS ⏐⏐⏐ 569
–p 0 t1 p 2p t (ms)
40°
e i
FIG. 13.90
Problem 34.
Vertical sensitivity = 0.5 V/div.
Horizontal sensitivity = 1 ms/div.
FIG. 13.91
Problem 36.