Question 1

An amplifier with a value of Av = 20 dB. What input voltage is required for the amplifier to provide an 8.5 V output?

Accepted Answer

A)  850 mV 
B)  85 mV 
C)  425 mV 
D)  186 mV 
A)  850 mV 
B)  85 mV 
C)  425 mV 
D)  186 mV

Question 2

- Which of the following circuit values is greater than the other two?

Accepted Answer

A)  Voltage gain Av) 
B)  Current gain Ai) 
C)  Power gain Ap) 
A)  Voltage gain Av) 
B)  Current gain Ai) 
C)  Power gain Ap)

Question 3

Which class of amplifier has the highest efficiency?

Accepted Answer

A)  Class A 
B)  Class B 
C)  Class C 
A)  Class A 
B)  Class B 
C)  Class C

Question 4

-The circuit in Figure  is a amplifier.

Accepted Answer

A)  Common emitter 
B)  Common collector 
C)  Common base 
D)  Class C 
A)  Common emitter 
B)  Common collector 
C)  Common base 
D)  Class C

Question 5

-An ideal amplifier has Zin.

Accepted Answer

A)  infinite 
B)  low 
C)  zero 
D)  high 
A)  infinite 
B)  low 
C)  zero 
D)  high

Question 6

-An amplifier has two transistors, one npn and one pnp. The transistor emitters are connected to each other and to the load. The amplifier is most likely a

Accepted Answer

A)  Common Emitter amplifier. 
B)  Class A amplifier. 
C)  Class B amplifier. 
D)  Class C amplifier. 
A)  Common Emitter amplifier. 
B)  Class A amplifier. 
C)  Class B amplifier. 
D)  Class C amplifier.

Question 7

An amplifier draws 1.8 W from its dc power supply and delivers 250 mW to its load. What is the efficiency of the amplifier?

Accepted Answer

A)  45% 
B)  13.9% 
C)  87.8% 
D)  12.2% 
A)  45% 
B)  13.9% 
C)  87.8% 
D)  12.2%

Question 8

-Assuming the circuit voltage gain is constant, what happens to vL when Zout decreases?

Accepted Answer

A)  It increases 
B)  It decreases 
C)  It remains unchanged 
A)  It increases 
B)  It decreases 
C)  It remains unchanged

Question 9

-An amplifier contains a single transistor with an LC tank in its collector circuit. The amplifier is most likely a/an

Accepted Answer

A)  Tuned amplifier. 
B)  Voltage-divider amplifier. 
C)  Emitter follower. 
D)  Reactance amplifier. 
A)  Tuned amplifier. 
B)  Voltage-divider amplifier. 
C)  Emitter follower. 
D)  Reactance amplifier.

Question 10

-Assuming the source voltage is constant, vL if Zin decreases.

Accepted Answer

A)  increases 
B)  decreases 
C)  remains unchanged 
A)  increases 
B)  decreases 
C)  remains unchanged

An amplifier with a value of Av = 20 dB. What input voltage is required for the amplifier to provide an 8.5 V output?

- Which of the following circuit values is greater than the other two?

Which class of amplifier has the highest efficiency?

-The circuit in Figure is a amplifier.

-An ideal amplifier has Zin.

-An amplifier has two transistors, one npn and one pnp. The transistor emitters are connected to each other and to the load. The amplifier is most likely a

An amplifier draws 1.8 W from its dc power supply and delivers 250 mW to its load. What is the efficiency of the amplifier?

-Assuming the circuit voltage gain is constant, what happens to vL when Zout decreases?

-An amplifier contains a single transistor with an LC tank in its collector circuit. The amplifier is most likely a/an

-Assuming the source voltage is constant, vL if Zin decreases.

Fundamental Solid-State Principles

Diodes

Common Diode Applications: Basic Power Supply Circuits

Common Diode Applications: Clippers, Clampers, Voltage Multipliers, and Displays

Special Applications Diodes

Bipolar Junction Transistors

DC Biasing Circuits

Common-Emitter Amplifiers

Other BJT Amplifiers

Power Amplifiers

Field-Effect Transistors

Mosfets

Amplifier Frequency Response

Operational Amplifiers

Additional Op-Amp Applications

Tuned Amplifiers

Oscillators

Solid-State Switching Circuits

Thyristors and Optoelectronics Devices

Discrete and Integrated Voltage Regulators

Filters

Exam 8: Introduction to Amplifiers

An amplifier with a value of Av = 20 dB. What input voltage is required for the amplifier to provide an 8.5 V output?

- Which of the following circuit values is greater than the other two?

Which class of amplifier has the highest efficiency?

-The circuit in Figure is a amplifier.

-An ideal amplifier has Zin.

-An amplifier has two transistors, one npn and one pnp. The transistor emitters are connected to each other and to the load. The amplifier is most likely a

An amplifier draws 1.8 W from its dc power supply and delivers 250 mW to its load. What is the efficiency of the amplifier?

-Assuming the circuit voltage gain is constant, what happens to vL when Zout decreases?

-An amplifier contains a single transistor with an LC tank in its collector circuit. The amplifier is most likely a/an

-Assuming the source voltage is constant, vL if Zin decreases.

Fundamental Solid-State Principles

Diodes

Common Diode Applications: Basic Power Supply Circuits

Common Diode Applications: Clippers, Clampers, Voltage Multipliers, and Displays

Special Applications Diodes

Bipolar Junction Transistors

DC Biasing Circuits

Common-Emitter Amplifiers

Other BJT Amplifiers

Power Amplifiers

Field-Effect Transistors

Mosfets

Amplifier Frequency Response

Operational Amplifiers

Additional Op-Amp Applications

Tuned Amplifiers

Oscillators

Solid-State Switching Circuits

Thyristors and Optoelectronics Devices

Discrete and Integrated Voltage Regulators

Filters