Question 1

If two or more amplifiers are connected to form a multistage amplifier

Accepted Answer

A)  gain remains constant. 
B)  gain increases. 
C)  gain is reduced. 
D)  more attenuation results. 
A)  gain remains constant. 
B)  gain increases. 
C)  gain is reduced. 
D)  more attenuation results. B

Question 2

Used with a zener diode,an emitter follower can produce regulated output voltages with much larger currents.

Accepted Answer

A) True 
 B)False  True

Question 3

A zener follower is a circuit that combines a zener regulator and a common emitter.

Accepted Answer

A) True 
 B)False  False

Question 4

If each transistor in a Darlington pair has a gain of 100,what is the overall current gain?

Accepted Answer

A)  100 
B)  200 
C)  1000 
D)  10,000 
A)  100 
B)  200 
C)  1000 
D)  10,000

Question 5

A Darlington connection comprised of npn and pnp transistors is called a

Accepted Answer

A)  stationary Darlington. 
B)  Duo-Darlington. 
C)  supplementary Darlington. 
D)  complementary Darlington. 
A)  stationary Darlington. 
B)  Duo-Darlington. 
C)  supplementary Darlington. 
D)  complementary Darlington.

Question 6

In any amplifier,maximum power transfer occurs when the

Accepted Answer

A)  load impedance is much higher than the source impedance. 
B)  load impedance is much lower than the source impedance. 
C)  load impedance is made equal to the source impedance. 
D)  load impedance is infinite and source impedance is zero. 
A)  load impedance is much higher than the source impedance. 
B)  load impedance is much lower than the source impedance. 
C)  load impedance is made equal to the source impedance. 
D)  load impedance is infinite and source impedance is zero.

Question 7

One of the major differences between the CB amplifier and other amplifier configurations is its

Accepted Answer

A)  low input impedance. 
B)  low output impedance. 
C)  high input impedance. 
D)  input and output phase difference. 
A)  low input impedance. 
B)  low output impedance. 
C)  high input impedance. 
D)  input and output phase difference.

Question 8

An advantage of a zener follower is

Accepted Answer

A)  low output impedance. 
B)  high output impedance. 
C)  large zener diode. 
D)  low cost. 
A)  low output impedance. 
B)  high output impedance. 
C)  large zener diode. 
D)  low cost.

Question 9

What amplifier configuration is shown in Figure 9-6 (a)?

Accepted Answer

A)  common emitter 
B)  common collector 
C)  common base. 
D)  base follower 
A)  common emitter 
B)  common collector 
C)  common base. 
D)  base follower

Question 10

The low impedance of a speaker can be matched to the output impedance of

Accepted Answer

A)  a common collector to deliver maximum power. 
B)  a common base to deliver maximum power. 
C)  a common emitter to deliver maximum power. 
D)  a coupling capacitor. 
A)  a common collector to deliver maximum power. 
B)  a common base to deliver maximum power. 
C)  a common emitter to deliver maximum power. 
D)  a coupling capacitor.

Question 11

In the circuit shown in Figure 9-8,what is the purpose of the capacitor connected to the emitter?

Accepted Answer

A)  filter 
B)  bypass 
C)  coupling 
D)  to block ac 
A)  filter 
B)  bypass 
C)  coupling 
D)  to block ac

Question 12

The reason a common-collector amplifier is called an emitter follower is because

Accepted Answer

A)  the output voltage follows the input voltage. 
B)  the output voltage is taken from the collector. 
C)  the emitter is grounded. 
D)  the output voltage is out of phase with the input. 
A)  the output voltage follows the input voltage. 
B)  the output voltage is taken from the collector. 
C)  the emitter is grounded. 
D)  the output voltage is out of phase with the input.

Question 13

A Darlington connection typically has a

Accepted Answer

A)  very high input impedance and can produce large output currents. 
B)  very low input impedance and can produce large output currents. 
C)  very high input impedance and can produce only small output currents. 
D)  very low input impedance and can produce only small output currents. 
A)  very high input impedance and can produce large output currents. 
B)  very low input impedance and can produce large output currents. 
C)  very high input impedance and can produce only small output currents. 
D)  very low input impedance and can produce only small output currents.

Question 14

A Darlington connection is a connection of two transistors whose overall current gain equals the sum of the individual gains.

Accepted Answer

A) True 
 B)False

Question 15

With a common-collector amplifier,the input signal is

Accepted Answer

A)  coupled to the base and the output signal is taken from the emitter. 
B)  coupled to the base and the output signal is taken from the collector. 
C)  coupled to the emitter and the output signal is taken from the collector. 
D)  coupled to the emitter and the output signal is taken from the base. 
A)  coupled to the base and the output signal is taken from the emitter. 
B)  coupled to the base and the output signal is taken from the collector. 
C)  coupled to the emitter and the output signal is taken from the collector. 
D)  coupled to the emitter and the output signal is taken from the base.

Question 16

What is the emitter voltage for the circuit shown in Figure 9-8?

Accepted Answer

A)  10 V 
B)  5 V 
C)  1 V 
D)  4.3 V 
A)  10 V 
B)  5 V 
C)  1 V 
D)  4.3 V

Question 17

How is the total voltage gain of a multistage amplifier calculated?

Accepted Answer

A)  sum of individual gains 
B)  difference of individual gains 
C)  product of individual gains 
D)  it is the gain of one amplifier 
A)  sum of individual gains 
B)  difference of individual gains 
C)  product of individual gains 
D)  it is the gain of one amplifier

Question 18

The emitter follower can be considered a

Accepted Answer

A)  voltage amplifier. 
B)  power amplifier. 
C)  a current attenuator. 
D)  a power supply. 
A)  voltage amplifier. 
B)  power amplifier. 
C)  a current attenuator. 
D)  a power supply.

Question 19

The emitter-follower amplifier has a

Accepted Answer

A)  low input impedance and low distortion. 
B)  high input impedance and high distortion. 
C)  high input impedance and low distortion. 
D)  low input impedance and high distortion. 
A)  low input impedance and low distortion. 
B)  high input impedance and high distortion. 
C)  high input impedance and low distortion. 
D)  low input impedance and high distortion.

Question 20

In conjunction with a zener diode,the emitter follower can

Accepted Answer

A)  provide amplified full-wave rectification. 
B)  provide amplified and filtered dc voltages. 
C)  produce regulated voltages with large output currents. 
D)  produce unregulated voltages. 
A)  provide amplified full-wave rectification. 
B)  provide amplified and filtered dc voltages. 
C)  produce regulated voltages with large output currents. 
D)  produce unregulated voltages.

Exam 9: Multistage,CC,and CB Amplifiers

If two or more amplifiers are connected to form a multistage amplifier

Used with a zener diode,an emitter follower can produce regulated output voltages with much larger currents.

A zener follower is a circuit that combines a zener regulator and a common emitter.

If each transistor in a Darlington pair has a gain of 100,what is the overall current gain?

A Darlington connection comprised of npn and pnp transistors is called a

In any amplifier,maximum power transfer occurs when the

One of the major differences between the CB amplifier and other amplifier configurations is its

An advantage of a zener follower is

What amplifier configuration is shown in Figure 9-6 (a)?

The low impedance of a speaker can be matched to the output impedance of

In the circuit shown in Figure 9-8,what is the purpose of the capacitor connected to the emitter?

The reason a common-collector amplifier is called an emitter follower is because

A Darlington connection typically has a

A Darlington connection is a connection of two transistors whose overall current gain equals the sum of the individual gains.

With a common-collector amplifier,the input signal is

What is the emitter voltage for the circuit shown in Figure 9-8?

How is the total voltage gain of a multistage amplifier calculated?

The emitter follower can be considered a

The emitter-follower amplifier has a

In conjunction with a zener diode,the emitter follower can

Introduction

Semoconductors

Diode Theory Key

Diode Circuits

Special-Purpose Diodes Key

BJT Fumdamentals

BJT Biasing

Basic BJT Amplifiers

Power Amplifiers

JFETS

Mosfets

Thyristors

Frequency Effects

Differential Amplifiers

Operational Amplifiers

Negative Feedback

Linear OP AMP Circuits

Active Filters Key

Nonlinear Op-Amp Circuit Applications Key

Oscillators Key

Regulated Power Supplies Key

Filters