Exam
Name___________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1)
The fundamental frequency of aperiodic waveform is
1)
A)
0Hz.
B)
one over the period of the waveform.
C)
the frequency at which the waveform pattern repeats.
D)
Both Band C
2)
The type of filter that passes high frequencies and rejects low frequencies is the
2)
A)
band reject filter.
B)
bandpass filter.
C)
lowpass filter.
D)
highpass filter.
3)
Alowpass filter circuit can be constructed from
3)
A)
resistors and inductors.
B)
resistors and capacitors.
C)
Both of the above
D)
None of the above
4)
The frequency response is plotted as
4)
A)
phase of H(j)versus frequency.
B)
magnitude of H(j)versus frequency.
C)
Both of the above
D)
None of the above
5)
Gain is fundamentally defined as the ratio of
5)
A)
input voltage to output voltage.
B)
output power to input power.
C)
input power to output power.
D)
output voltage to input voltage.
6)
The scales on amagnitude Bode plot are the magnitude of H(j)
6)
A)
on alinear scale vs. frequency on alinear scale.
B)
in dB on alog scale vs. frequency on alog scale.
C)
in dB on alinear scale vs. frequency on alog scale.
D)
in dB on alinear scale vs. frequency on alinear scale.
7)
When the phase is changing versus frequency in alowpass or highpass filter, the slope of the angle
of H(j)on the phase Bode plot is
7)
A)
0°/decade.
B)
±45°/decade.
C)
±180°/decade.
D)
±90°/decade.
8)
The phase changes significantly in alowpass or highpass filter
8)
A)
from 1/10 of the break frequency to 10 times the break frequency.
B)
from 1/100 of the break frequency to 100times the break frequency.
C)
only in the vicinity of the break frequency.
D)
from 1/2 of the break frequency to 2times the break frequency.
9)
The transfer function is most often
9)
A)
the ratio of one voltage magnitude to another voltage magnitude.
B)
the ratio of one phasor voltage to another phasor voltage.
C)
the ratio of one frequency to another frequency.
D)
None of the above
10)
If aperiodic signal is applied to acircuit, the output is determined by
10)
A)
summing the output phasors of all harmonics.
B)
running an AC simulation at the fundamental frequency.
C)
summing the output time domain terms of all harmonics.
D)
None of the above
11)
When H(j)is 0dB at some given frequency, H(j)as aratio equals
11)
A)
0
B)
1
C)
negative infinity
D)
None of the above
B
12)
In alowpass filter, the slope of the magnitude Bode plot above the break frequency is
12)
A)
–20 dB/decade.
B)
–10 dB/decade.
C)
+20 dB/decade.
D)
+10 dB/decade.
C
13)
Definition of the gain in dB is
13)
A)
10 log (Vout/Vin).
B)
20 log (Pout/Pin).
C)
Both of the above
D)
None of the above
D
14)
Aharmonic is
14)
A)
half of the fundamental frequency.
B)
double the fundamental frequency.
C)
a integer multiple of the fundamental frequency.
D)
None of the above
C
C
15)
The scales on aphase Bode plot are the angle of H(j)
15)
A)
in dB on alinear scale vs. frequency on alog scale.
B)
on alinear scale vs. frequency on alog scale.
C)
on alinear scale vs. frequency on alinear scale.
D)
in dB on alinear scale vs. frequency on alinear scale.
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
16)
An RC lowpass filter consists of aresistor Rin series with acapacitor C. The radian break
frequency expression in terms of circuit components is ________.
16)
17)
An RL highpass filter consists of aresistor Rin series with an inductor L. The expression for
the phase of H(j)in degrees in terms of the break frequency is ________.
17)
18)
An RC lowpass filter consists of aresistor Rin series with acapacitor C. The expression for
the magnitude H(j)in dB in terms of the break frequency is ________.
18)
19)
An RL highpass filter consists of aresistor Rin series with an inductor L. The phase of H(j)
at bin aBode plot is ________.
19)
20)
An RC highpass filter consists of acapacitor Cin series with aresistor R. The transfer
function expression (as aratio) in terms of the break frequency is ________.
20)
21)
An RL lowpass filter consists of an inductor Lin series with aresistor R. The phase of H(j)
at 0.1bin aBode plot is ________.
21)
22)
An RL highpass filter consists of aresistor Rin series with an inductor L. The radian break
frequency expression in terms of circuit components is ________.
22)
23)
An RC lowpass filter consists of aresistor Rin series with acapacitor C. H(j)in dB or the
slope of H(j), whichever is applicable, above the break frequency in aBode plot is
________.
23)
24)
An RC lowpass filter consists of aresistor Rin series with acapacitor C. The transfer
function expression (as aratio) in terms of the break frequency is ________.
24)
25)
An RL lowpass filter consists of an inductor Lin series with aresistor R. The expression for
the phase of H(j)in degrees in terms of the break frequency is ________.
25)
26)
An RL highpass filter consists of aresistor Rin series with an inductor L. The expression for
the magnitude H(j)in dB in terms of the break frequency is ________.
26)
27)
An RL highpass filter consists of aresistor Rin series with an inductor L. The transfer
function expression (as aratio) in terms of the break frequency is ________.
27)
28)
An RC highpass filter consists of acapacitor Cin series with aresistor R. The expression for
the magnitude H(j)in dB in terms of the break frequency is ________.
28)
29)
An RL highpass filter consists of aresistor Rin series with an inductor L. The component
across which the output terminals are located is ________.
29)
30)
An RL lowpass filter consists of an inductor Lin series with aresistor R. The component
across which the output terminals are located is ________.
30)
31)
An RC lowpass filter consists of aresistor Rin series with acapacitor C. The phase of H(j)
at 10bin aBode plot is ________.
31)
32)
An RC highpass filter consists of acapacitor Cin series with aresistor R. The phase of H(j)
at bin aBode plot is ________.
32)
33)
An RL lowpass filter consists of an inductor Lin series with aresistor R. H(j)in dB or the
slope of H(j), whichever is applicable, above the break frequency in aBode plot is
________.
33)
34)
An RC highpass filter consists of acapacitor Cin series with aresistor R. H(j)in dB or the
slope of H(j), whichever is applicable, below the break frequency in aBode plot is
________.
34)
35)
An RC lowpass filter consists of aresistor Rin series with acapacitor C. The phase of H(j)
at bin aBode plot is ________.
35)
36)
An RL lowpass filter consists of an inductor Lin series with aresistor R. The expression for
the magnitude H(j)in dB in terms of the break frequency is ________.
36)
37)
An RC lowpass filter consists of aresistor Rin series with acapacitor C. H(j)in dB or the
slope of H(j), whichever is applicable, below the break frequency in aBode plot is
________.
37)
38)
An RC highpass filter consists of acapacitor Cin series with aresistor R. The phase of H(j)
at 0.1bin aBode plot is ________.
38)
39)
An RL lowpass filter consists of an inductor Lin series with aresistor R. The radian break
frequency expression in terms of circuit components is ________.
39)
40)
An RL lowpass filter consists of an inductor Lin series with aresistor R. The phase of H(j)
at 10bin aBode plot is ________.
40)
41)
An RL lowpass filter consists of an inductor Lin series with aresistor R. The phase of H(j)
at bin aBode plot is ________.
41)
42)
An RC highpass filter consists of acapacitor Cin series with aresistor R. The radian break
frequency expression in terms of circuit components is ________.
42)
43)
An RC lowpass filter consists of aresistor Rin series with acapacitor C. The component
across which the output terminals are located is ________.
43)
44)
An RL highpass filter consists of aresistor Rin series with an inductor L. The phase of H(j)
at 10bin aBode plot is ________.
44)
45)
An RC lowpass filter consists of aresistor Rin series with acapacitor C. The phase of H(j)
at 0.1bin aBode plot is ________.
45)
46)
An RC highpass filter consists of acapacitor Cin series with aresistor R. The expression for
the phase of H(j)in degrees in terms of the break frequency is ________.
46)
47)
An RC highpass filter consists of acapacitor Cin series with aresistor R. H(j)in dB or the
slope of H(j), whichever is applicable, above the break frequency in aBode plot is
________.
47)
48)
An RL highpass filter consists of aresistor Rin series with an inductor L. H(j)in dB or the
slope of H(j), whichever is applicable, above the break frequency in aBode plot is
________.
48)
49)
An RL lowpass filter consists of an inductor Lin series with aresistor R. H(j)in dB or the
slope of H(j), whichever is applicable, below the break frequency in aBode plot is
________.
49)
50)
An RC highpass filter consists of acapacitor Cin series with aresistor R. The phase of H(j)
at 10bin aBode plot is ________.
50)
51)
An RC lowpass filter consists of aresistor Rin series with acapacitor C. The expression for
the phase of H(j)in degrees in terms of the break frequency is ________.
51)
52)
An RL highpass filter consists of aresistor Rin series with an inductor L. H(j)in dB or the
slope of H(j), whichever is applicable, below the break frequency in aBode plot is
________.
52)
53)
An RL lowpass filter consists of an inductor Lin series with aresistor R. The transfer
function expression (as aratio) in terms of the break frequency is ________.
53)
54)
An RC highpass filter consists of acapacitor Cin series with aresistor R. The component
across which the output terminals are located is ________.
54)
55)
An RL highpass filter consists of aresistor Rin series with an inductor L. The phase of H(j)
at 0.1bin aBode plot is ________.
55)
TRUE/FALSE. Write ‘T’ if the statement is true and ‘F’ if the statement is false.
56)
The primary difference between amagnitude Bode plot and amagnitude frequency response plot
occurs in the vicinity of the break frequency.
56)
57)
The triangle wave and the square wave have exactly the same Fourier series.
57)
58)
Logarithms compress large ranges of numbers and expand small ranges of numbers.
58)
59)
ABode plot and afrequency response plot are exactly the same thing.
59)
60)
In general, any periodic signal contains only one frequency.
60)
61)
If asquare wave is applied to the input of acircuit, then the output will always be asquare wave.
61)
62)
The transfer function depends on the input signal magnitude.
62)
63)
Acircuit can be analyzed without knowing the frequency.
63)
64)
The transfer function depends on frequency.
64)
65)
Taking the logarithm of aset of numbers and plotting the results on alinear scale is equivalent to
plotting the original numbers directly on alog scale.
65)
66)
The Fourier series is amathematical tool to determine the amplitudes of the frequency components
of aperiodic waveform.
66)
67)
The frequency response of apractical filter can have sharp corners.
67)
68)
H(j)is only amagnitude because it does not have atilde above it.
68)
69)
The transfer function can be plotted as afrequency response.
69)
70)
The transfer function depends on component values.
70)
Answer Key
Testname: C15
Answer Key
Testname: C15
11