Question 1

Figure $18 < 1$
-The input impedance of the amplifier in Figure 18-1(b)is ________.

Accepted Answer

A) very high. 
B) very low 
C) about 10 kΩ 
A) very high. 
B) very low 
C) about 10 kΩ

Question 2

To operate as a voltage regulator, a zener diode requires a:

Accepted Answer

A) series capacitor. 
B) transformer. 
C) silicon diode. 
D) series resistor. 
A) series capacitor. 
B) transformer. 
C) silicon diode. 
D) series resistor.

Question 3

A common name for a PN junction is the transistor.

Accepted Answer

A) True 
 B)False

Question 4

If the load current decreases in a simple zener regulator, the ________.

Accepted Answer

A) zener current decreases 
B) zener current increases 
C) current through the series resistor decreases 
D) voltage across the series resistor decreases 
A) zener current decreases 
B) zener current increases 
C) current through the series resistor decreases 
D) voltage across the series resistor decreases

Question 5

A CMRR of 90,000 equals a decibel CMRR of ________.

Accepted Answer

A) -99 dB 
B) 99 dB 
C) 90,000 dB 
D) 91 dB 
A) -99 dB 
B) 99 dB 
C) 90,000 dB 
D) 91 dB

Question 6

Zener diodes can conduct very large currents.

Accepted Answer

A) True 
 B)False

Question 7

An amplifier that provides its own input is called an oscillator.

Accepted Answer

A) True 
 B)False

Question 8

The small variation in the output voltage of a dc power supply is called ________.

Accepted Answer

A) residualVoltage 
B) ac to dc conversion 
C) rippleVoltage 
D) averageVoltage 
A) residualVoltage 
B) ac to dc conversion 
C) rippleVoltage 
D) averageVoltage

Question 9

Figure $19 < 5$
-If VOUT equals 12 V at 822 Hz in Figure 19-5, the output voltage equals ________ at 450 Hz.

Accepted Answer

A) 4.24V 
B) 1.06V 
C) 8.49V 
D) 2.12V 
A) 4.24V 
B) 1.06V 
C) 8.49V 
D) 2.12V

Question 10

The ripple voltage from a power supply ________.

Accepted Answer

A) varies With load 
B) is Very high 
C) is about 1V 
D) is zero 
A) varies With load 
B) is Very high 
C) is about 1V 
D) is zero

Question 11

In a voltage-controlled oscillator (VCO), the output signal frequency is dependent on:

Accepted Answer

A) the value of a resistor-capacitor combination. 
B) the value of a resistor. 
C) the value of an applied Voltage. 
D) the value of a capacitor. 
A) the value of a resistor-capacitor combination. 
B) the value of a resistor. 
C) the value of an applied Voltage. 
D) the value of a capacitor.

Question 12

(a)
 
(b)
 
(c)

Figure $16 < 1$

-If the diode opens in Figure 16-1(b), the voltage across the diode is ________.

Accepted Answer

A) 4.3V 
B) 0V 
C) 0.7V 
D) 1V 
A) 4.3V 
B) 0V 
C) 0.7V 
D) 1V

Question 13

If the base current increases, ________.

Accepted Answer

A) the collector current increases and the emitter current does not change 
B) the collector current increases and the emitter current increases 
C) the collector current increases and the emitter current decreases 
D) the collector current decreases and the emitter current decreases 
A) the collector current increases and the emitter current does not change 
B) the collector current increases and the emitter current increases 
C) the collector current increases and the emitter current decreases 
D) the collector current decreases and the emitter current decreases

Question 14

\(\text { Figure } 17 RC equals_________

Accepted Answer

A)   VBE 
B)   10 V 
C)   0 V 
D)   20 V 
A)   VBE 
B)   10 V 
C)   0 V 
D)   20 V

Question 15

\[\text { Figure } 17 3 opens in Figure 17-4,________

Accepted Answer

A)  the voltage gain decreases 
B)  the voltage gain increases 
C)  the dc emitter voltage decreases 
D)  the dc emitter voltage increases 
A)  the voltage gain decreases 
B)  the voltage gain increases 
C)  the dc emitter voltage decreases 
D)  the dc emitter voltage increases

Question 16

Figure $18 < 1$
-The circuit in Figure 18-1(a)is used as a(n)________.

Accepted Answer

A) inverting amplifier 
B) buffer amplifier 
C) oscillator 
D) high gain amplifier 
A) inverting amplifier 
B) buffer amplifier 
C) oscillator 
D) high gain amplifier

Question 17

The terminals on a three-terminal regulator are input voltage, output voltage and ground.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following amplifiers has phase inversion?

Accepted Answer

A) common-emitter 
B) common-crystal 
C) common-collector 
D) common-drain 
A) common-emitter 
B) common-crystal 
C) common-collector 
D) common-drain

Question 19

A Class ________ amplifier is very efficient. It is useful mainly at ________ frequencies.

Accepted Answer

A) C, audio 
B) A, radio 
C) C, radio 
D) B, audio 
A) C, audio 
B) A, radio 
C) C, radio 
D) B, audio

Question 20

A full- Wave rectifier uses ________ diodes and a transformerW ith a ________.

Accepted Answer

A) two, single secondary 
B) four, center tap 
C) one, single secondary 
D) two, center tap 
A) two, single secondary 
B) four, center tap 
C) one, single secondary 
D) two, center tap

Figure $18 < 1$ -The input impedance of the amplifier in Figure 18-1(b)is ________.

To operate as a voltage regulator, a zener diode requires a:

A common name for a PN junction is the transistor.

If the load current decreases in a simple zener regulator, the ________.

A CMRR of 90,000 equals a decibel CMRR of ________.

Zener diodes can conduct very large currents.

An amplifier that provides its own input is called an oscillator.

The small variation in the output voltage of a dc power supply is called ________.

Figure $19 < 5$ -If VOUT equals 12 V at 822 Hz in Figure 19-5, the output voltage equals ________ at 450 Hz.

The ripple voltage from a power supply ________.

In a voltage-controlled oscillator (VCO), the output signal frequency is dependent on:

(a) (b) (c) Figure $16 < 1$ -If the diode opens in Figure 16-1(b), the voltage across the diode is ________.

If the base current increases, ________.

$\text { Figure } 17 < 1 -If the BJT's collector opened internally in Figure 17-1, V<sub>RC</sub> equals_________$ $\text { Figure } 17 < 1$ -If the BJT's collector opened internally in Figure 17-1, V_RC equals_________

$\text { Figure } 17 < 4 -If C<sub>3</sub> opens in Figure 17-4,$ $\text { Figure } 17 < 4$ -If C₃ opens in Figure 17-4,

Figure $18 < 1$ -The circuit in Figure 18-1(a)is used as a(n)________.

The terminals on a three-terminal regulator are input voltage, output voltage and ground.

Which of the following amplifiers has phase inversion?

A Class amplifier is very efficient. It is useful mainly at frequencies.

A full- Wave rectifier uses diodes and a transformerW ith a .

Quantities and Units

Voltage, Current, and Resistance

Ohms Law, Energy, and Power

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Magnetism and Electromagnetism

Introduction to Alternating Current and Voltage

Capacitors

Rc Circuits

Inductors

Rl Circuits

Rlc Circuits and Resonance

Time Response of Reactive Circuits

Transformers

Understanding Transducers, Sensors, and Conversion in Industrial Processes

Filters

Exam 16: Regulators, Filters, and Op-Amps

Figure 18<118 < 118<1 -The input impedance of the amplifier in Figure 18-1(b)is ________.

To operate as a voltage regulator, a zener diode requires a:

A common name for a PN junction is the transistor.

If the load current decreases in a simple zener regulator, the ________.

A CMRR of 90,000 equals a decibel CMRR of ________.

Zener diodes can conduct very large currents.

An amplifier that provides its own input is called an oscillator.

The small variation in the output voltage of a dc power supply is called ________.

Figure 19<519 < 519<5 -If VOUT equals 12 V at 822 Hz in Figure 19-5, the output voltage equals ________ at 450 Hz.

The ripple voltage from a power supply ________.

In a voltage-controlled oscillator (VCO), the output signal frequency is dependent on:

(a) (b) (c) Figure 16<116 < 116<1 -If the diode opens in Figure 16-1(b), the voltage across the diode is ________.

If the base current increases, ________.

Figure 17<1\text { Figure } 17 < 1 Figure 17<1 -If the BJT's collector opened internally in Figure 17-1, VRC equals_________

Figure 17<4\text { Figure } 17 < 4 Figure 17<4 -If C3 opens in Figure 17-4,________

Figure 18<118 < 118<1 -The circuit in Figure 18-1(a)is used as a(n)________.

The terminals on a three-terminal regulator are input voltage, output voltage and ground.

Which of the following amplifiers has phase inversion?

A Class ________ amplifier is very efficient. It is useful mainly at ________ frequencies.

A full- Wave rectifier uses ________ diodes and a transformerW ith a ________.

Quantities and Units

Voltage, Current, and Resistance

Ohms Law, Energy, and Power

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Magnetism and Electromagnetism

Introduction to Alternating Current and Voltage

Capacitors

Rc Circuits

Inductors

Rl Circuits

Rlc Circuits and Resonance

Time Response of Reactive Circuits

Transformers

Understanding Transducers, Sensors, and Conversion in Industrial Processes

Filters

Figure $18 < 1$ -The input impedance of the amplifier in Figure 18-1(b)is ________.

Figure $19 < 5$ -If VOUT equals 12 V at 822 Hz in Figure 19-5, the output voltage equals ________ at 450 Hz.

(a) (b) (c) Figure $16 < 1$ -If the diode opens in Figure 16-1(b), the voltage across the diode is ________.

$\text { Figure } 17 < 1 -If the BJT's collector opened internally in Figure 17-1, V<sub>RC</sub> equals_________$ $\text { Figure } 17 < 1$ -If the BJT's collector opened internally in Figure 17-1, V_RC equals_________

$\text { Figure } 17 < 4 -If C<sub>3</sub> opens in Figure 17-4,$ $\text { Figure } 17 < 4$ -If C₃ opens in Figure 17-4,

Figure $18 < 1$ -The circuit in Figure 18-1(a)is used as a(n)________.

A Class amplifier is very efficient. It is useful mainly at frequencies.

A full- Wave rectifier uses diodes and a transformerW ith a .