Question 1

-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 B

Question 2

The general characteristics of a common-emitter amplifier are high voltage gain, high current gain 
and no phase reversal between the input and output voltages.

Accepted Answer

A) True 
 B)False  False

Question 3

A crystal oscillator uses a crystal to determine the ________.

Accepted Answer

A) dc output 
B) amount of negative feedback 
C) amount of positive feedback 
D) output frequency 
A) dc output 
B) amount of negative feedback 
C) amount of positive feedback 
D) output frequency D

Question 4

-If C1 opens in Figure 17-5, the circuit will probably ________.

Accepted Answer

A) increase its oscillating frequency 
B) decrease its oscillating frequency 
C) continue to operate normally 
D) stop oscillating entirely 
A) increase its oscillating frequency 
B) decrease its oscillating frequency 
C) continue to operate normally 
D) stop oscillating entirely

Question 5

-The output signal of a CE amplifier is always ________.

Accepted Answer

A) out-of-phase with the input signal 
B) equal to the input signal 
C) in-phase with the input signal 
D) larger than the input signal 
A) out-of-phase with the input signal 
B) equal to the input signal 
C) in-phase with the input signal 
D) larger than the input signal

Question 6

-If the value of   increases in Figure 17-5, the circuit ________.

Accepted Answer

A) operates at a higher frequency 
B) operates at dc 
C) operates at a lower frequency 
D) does not change at all 
A) operates at a higher frequency 
B) operates at dc 
C) operates at a lower frequency 
D) does not change at all

Question 7

-A Class ________ amplifier is very efficient.

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 8

-The circuit in Figure 17-5 is a ________ oscillator and uses ________ feedback.

Accepted Answer

A) Colpitts, positive 
B) Colpitts, negative 
C) crystal, negative 
D) Hartley, positive 
A) Colpitts, positive 
B) Colpitts, negative 
C) crystal, negative 
D) Hartley, positive

Question 9

The general characteristics of a common-emitter amplifier are low voltage gain, low current gain 
and very high power gain.

Accepted Answer

A) True 
 B)False

Question 10

The most popular and widely used transistor amplifier configuration is the:

Accepted Answer

A) common-purpose. 
B) common-emitter. 
C) common-drain. 
D) common-collector. 
A) common-purpose. 
B) common-emitter. 
C) common-drain. 
D) common-collector.

Question 11

-Which voltage might allow the circuit in Figure 17-4 to operate with minimum distortion?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 12

-The amplifier in Figure 17-2 uses a ________ and the gate current is ________.

Accepted Answer

A) TRIAC, 10 mA 
B) JFET, 5 mA 
C) JFET, 0 A 
D) BJT, 0 A 
A) TRIAC, 10 mA 
B) JFET, 5 mA 
C) JFET, 0 A 
D) BJT, 0 A

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

-For normal operation of a NPN transistor, the base must be ________.

Accepted Answer

A) positive with respect to the collector 
B) positive with respect to the emitter 
C) negative with respect to the emitter 
D) disconnected 
A) positive with respect to the collector 
B) positive with respect to the emitter 
C) negative with respect to the emitter 
D) disconnected

Question 15

-If R1 shorts in Figure 17-4,   ________.

Accepted Answer

A)    
B)    
C)    
D) does not change 
A)    
B)    
C)    
D) does not change

Question 16

Amplifiers are electronic circuits that accept an AC input signal and produce an output signal that represents a:

Accepted Answer

A) voltage gain. 
B) power gain. 
C) current gain. 
D) all of these. 
A) voltage gain. 
B) power gain. 
C) current gain. 
D) all of these.

Question 17

-If the collector-to-emitter voltage is about 0 V in Figure 17-1, the possible trouble is ________.

Accepted Answer

A) the amplifier is saturated 
B) the amplifier is cut off 
C) this is a normal condition 
D) the transistor is open 
A) the amplifier is saturated 
B) the amplifier is cut off 
C) this is a normal condition 
D) the transistor is open

Question 18

-If   opens in Figure 17-1, IC ________.

Accepted Answer

A) remains the same 
B) decreases 
C) increases 
D) decreases to zero 
A) remains the same 
B) decreases 
C) increases 
D) decreases to zero

Question 19

A common-collector amplifier has a high input impedance compared to a common-emitter 18)
amplifier.

Accepted Answer

A) True 
 B)False

Question 20

Which one of these characteristics is found in a common-collector amplifier?

Accepted Answer

A) a high input resistance 
B) a very high power gain 
C) a current gain of one 
D) a low input resistance 
A) a high input resistance 
B) a very high power gain 
C) a current gain of one 
D) a low input resistance

Exam 17: RlC Circuits and Resonance

-If the base current increases, ________.

The general characteristics of a common-emitter amplifier are high voltage gain, high current gain and no phase reversal between the input and output voltages.

A crystal oscillator uses a crystal to determine the ________.

-If C1 opens in Figure 17-5, the circuit will probably ________.

-The output signal of a CE amplifier is always ________.

-If the value of increases in Figure 17-5, the circuit ________.

-A Class ________ amplifier is very efficient.

-The circuit in Figure 17-5 is a ________ oscillator and uses ________ feedback.

The general characteristics of a common-emitter amplifier are low voltage gain, low current gain and very high power gain.

The most popular and widely used transistor amplifier configuration is the:

-Which voltage might allow the circuit in Figure 17-4 to operate with minimum distortion?

-The amplifier in Figure 17-2 uses a ________ and the gate current is ________.

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

-For normal operation of a NPN transistor, the base must be ________.

-If R1 shorts in Figure 17-4, ________.

Amplifiers are electronic circuits that accept an AC input signal and produce an output signal that represents a:

-If the collector-to-emitter voltage is about 0 V in Figure 17-1, the possible trouble is ________.

-If opens in Figure 17-1, IC ________.

A common-collector amplifier has a high input impedance compared to a common-emitter 18) amplifier.

Which one of these characteristics is found in a common-collector amplifier?

Quantities and Units

Voltage, Current, and Resistance

Ohms Law

Energy and Power

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Circuit Theorems and Conversions

Branch, Loop, and Node Analyses

Magnetism and Electromagnetism

Introduction to Alternating Current and Voltage

Capacitors

Inductors

Transformers

RC Circuits

RL Circuits

Passive Filters

Circuit Theorems in Ac Analysis

Time Response of Reactive Circuits

Three-Phase Systems in Power Applications

Filters

-The circuit in Figure 17-5 is a oscillator and uses feedback.

-The amplifier in Figure 17-2 uses a and the gate current is .