Electronic Devices and Circuit Theory 11th Edition by Boylestad Nashelsky ISBN Test Bank
Electronic Devices and Circuit Theory 11th Edition by Boylestad Nashelsky ISBN Test Bank
Electronic Devices and Circuit Theory 11th Edition by Boylestad Nashelsky ISBN Test Bank
A) = 10 V and = l mA B) = 1 V and = l mA
C) D)
= 10 V and = l0 mA = 1 V and = l0 mA
2) If one silicon diode and one germanium diode are connected in series, the voltage drop across 2)
the combination of the two diodes will be equal to .
A) the forward drop equal to that of the silicon diode
B) the forward drop equal to that of the difference of the voltage drops across the two diodes
C) the forward drop equal to that of the sum of the voltage drops across the two diodes
D) the forward drop equal to that of the germanium diode
A) The diode will block all current and there will be no current flowing through the load.
B) positive half cycle of the input waveform
C) negative half cycle of the input waveform
D) entire input waveform
6) Calculate the peak current that will flow through this circuit, assuming an ideal diode. 6)
7) For this clipping circuit, what will be the maximum output voltage when the diode is 7)
conducting?
8) For this clipping circuit, what is the maximum output voltage when the diode is not conducting? 8)
9) For this clipping circuit, what is the minimum output voltage when the diode is conducting? 9)
10) What is the minimum output voltage for this clipping circuit when the diode is not conducting?
10)
11) What is the maximum output voltage for this clamping circuit? 11)
12) What is the minimum output voltage for this clamping circuit? 12)
13) What are the minimum and maximum values of current flowing in the variable load resistor 13)
while the diode is operating in the Zener region? The zener voltage is 10 V.
A) 8 mA and 35 mA
B) 12.5 mA and 40 mA
C) Need to know the load resistance to determine the values.
D) 8 mA and 40 mA
14) The point of intersection between the characteristic curve of the diode and the resistors loadline is known
as the 14)
.
A) quiescent point B) Q-point
C) point of operation D) All of the above
15) Given a series silicon diode circuit with the resistor R = 2 kΩ ohms and an applied voltage of 10
15)
V, what is ?
A) 4.65 mA B) 0.5 mA C) 1.0 mA D) 10 mA
16)
A series silicon diode circuit has a 2 kΩ resistor and a 10 V source. Determine if is 4.5 mA. 16)
A)0.7V B)2V C)1V D)11.5V
17)
For this series diode configuration, use the diode characteristic to estimate the value of .
17)
18) Generally a silicon diode is in the state if the current established by the applied voltage 18)
source is in the direction of the diode symbol's arrow and is greater than or equal to 0.7 V.
A) saturated B) on C) off D) reverse-biased
19) Generally a germanium diode is in the state when the current established by the 19)
applied voltage source is in the direction of the diode symbol's arrow and is greater than or
equal to 0.3 V.
A) on B) reverse-biased C) saturated D) off
A) 0 A B) 0.5 mA C) 5 mA D) 0.5 A
21) The resistor voltage and resistor current in this circuit are .
21)
A) 10 V, 5 mA B) 2 V, 11 mA C) 11 V, 2 mA D) 11 V, 11 mA
22) What is the value of the voltage dropped across forward-biased silicon diodes that are connected 22)
in parallel with each other?
A) 11.3 V B) 1.4 V C)0.35V D) 0.7 V
24) When the diode in a half-wave rectifier points toward the load, the output from the rectifier is 24)
.
A) either positive or negative, depending on the polarity of the transformer secondary voltage
B) positive
C) negative
D) full-wave
25) A half-wave rectifier with the diode arrow pointing away from the load has a DC output voltage 25)
of for an AC input voltage of 20 V maximum.
A) -6.14 V B) 12.49 V C) 19.3 V D) -13.65 V
26) Why are bridge rectifiers preferred over full-wave center-tapped rectifiers? 26)
A) They provide higher dc output voltages.
B) They require a lower PIV rating.
C) They do not require the use of a center-tapped transformer.
D) All the above
27) 27)
A bridge rectifier has values of = 177 V, turns ratio = 5 : 1, and = 500 Ω. What is the dc
27)
output voltage?
A) 3.75 V B) 6.88 V C) 21.62 V D) 9.91 V
28) 28)
A positive full-wave center-tapped rectifier has a secondary voltage of 20 . The peak load voltage for the
circuit is if the diode drop is included. 28)
A) B) C) D)
10 19.3 20 9.3
29) 29)
A full-wave center-tapped rectifier has a secondary maximum voltage of 20 and a 4.7 kΩ
load resistance. What is the dc load current for the circuit?
A) 2.61 mA B) 629.8 mA C) 1.26 mA D) 1.4 mA
30)
30) Which of the following circuits is used to eliminate a portion of a signal?
A) Voltage multiplier B) Clipper
C) Voltage divider D) Damper
31)
31) The two general categories of clippers are .
A) half-wave and full-wave B) series and parallel
C) dc restorer and dc eliminator D) regenerator and eliminator
32)
32) The circuit shown here is a .
34) Which of the following circuits is used to change the dc reference of a signal without changing 34)
the shape of the signal?
A) a clamper B) a voltage multiplier
C) a voltage divider D) a clipper
35) A clamper must have a(n) that is large enough to maintain the capacitor's charge 35)
during diode conduction.
A) dc restorer B) applied voltage
C) diode voltage D) RC time constant
37) Assuming this circuit uses a silicon diode, the output voltage is clamped to .
37)
39) Given that a 1000 Hz signal is applied to a clamper with a resistor value of 10 kΩ. What is the 39)
minimum value of capacitor needed to maintain safe clamping action?
A) 0.25 pF B) 250 pF C) 5 pF D) 10 pF
40) When the output signal to a clamper circuit is clamped to zero, the total swing of the output is 40)
equal to .
A) the total diode voltage drop B) half the total voltage drop
C) half the total input voltage swing D) the total input voltage swing
44) The most frequent application for a is in regulator networks and as a reference voltage. 44)
A) Zener diode B) half-wave rectifier
C) ideal diode D) full-wave rectifier
46) When the Zener regulator is used to stabilize the output voltage, given a fixed input voltage and a variabl
e load 46)
resistanc
e, a load
resistanc
e that is
too small
results in
.
A) being greater than B) being equal to
C) D)
being equal to being less than
47) When a Zener diode circuit is used to stabilize the output voltage given a fixed load resistor and 47)
a variable input voltage, the input voltage must be .
A) small enough to turn off the Zener diode B) large enough to turn on the Zener diode
C) small enough to turn on the Zener diode D) large enough to turn off the Zener diode
49) A Zener diode is designed to operate in the region of its characteristic curve. 49)
A) reverse breakdown B) reverse bias
C) zero voltage D) forward operating
50) When analyzing a diode circuit with both a dc and ac source . 50)
A) first determine the bulk resistance of the diode
B) only the dc source is considered
C) use superposition
D) Thevenize the circuit
1) C
2) C
3) D
4) C
5) B
6) B
7) C
8) A
9) D
10) C
11) A
12) C
13) D
14) D
15) A
16) C
17) D
18) B
19) A
20) A
21) D
22) D
23) B
24) B
25) A
26) D
27) C
28) D
29) C
30) B
31) B
32) C
33) B
34) A
35) D
36) D
37) A
38) D
39) B
40) D
41) B
42) D
43) D
44) A
45) C
46) D
47) B
48) D
49) A
50) C