Exam
Name___________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) Find the frequency of a periodic wave that has a period of one hour.
A) 0.278 mHz
B) 278 mHz
C) 2.78 mHz
D) 27.8 mHz
2) What is the frequency in the equation v = 35 sin(5000t)?
A) 2500/ Hz
B) 5000 Hz
C) 5000 Hz
D) 35 Hz
3) What is the period of a 50 kHz sine wave?
A) 20 µs
B) 5 × 104 s
1)
2)
3)
C) 5 µs
D) 50 µs
4) Which one of the following rectangular values is equivalent to the polar form 20 55°?
A) 11.5 - j16.4
B) 16.4 + j11.5
C) 16.4 - j11.5
D) 11.5 + j16.4
4)
5) Which one of the following values is equivalent to (5 + j3)(4 - j6)?
A) 38 + j18
B) 2 + j18
C) 2 - j18
5)
D) 38 - j18
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Figure 13.3
6) See Figure 13.3. An oscilloscope screen produces the waveform shown. The vertical
sensitivity control is set to 20 volts per major division, and the horizontal sensitivity is set
at 100 µs per major division. What is the frequency of the displayed waveform?
6)
7) See Figure 13.3. An oscilloscope screen produces the waveform shown. The vertical
sensitivity control is set to 20 volts per major division, and the horizontal sensitivity is set
at 100 µs per major division. Write the general voltage equation that describes this
waveform.
7)
1
Figure 13.4
8) See Figure 13.4. Write the general voltage equation that describes this waveform.
2
8)
Answer Key
Testname: UNTITLED1
1)
2)
3)
4)
5)
6)
7)
8)
A
A
A
D
D
1.25 kHz
60 sin(2500 t)
20 sin(250 t + 45°)
3