Electronic Circuits Practice Quiz 09

Electronic Circuits Practice Quiz 09

Welcome to ECE Board Exam Practice Quiz for Electronic Circuits. This set of practice quiz 9 will test your competence on the theories, concepts and problem solving involving Electronic Circuits. The objectives and goals of this quiz is to help engineering students familiarize concepts and theories as well as develop problem solving skills when answering questions related to the Electronic Circuits.

Electronic Circuits Test Bank

In this section are compiled practice quiz for Electronic Circuits that could be able to enhance your knowledge and skills in your preparation for the ECE Board Exam. The goal is to add thousands of questions for you to be familiarized and hopefully help you to be prepared. I am looking forward that this practice quiz will give you an additional confidence in taking your upcoming Engineering Board Exam.

Guidelines:
  • Read and understand each question before choosing the best answer.
  • The correct answer will be reveal after you have chosen your answer for every questions
  • There is no time limit, answer the questions at your own pace.
  • Once all questions are answered, you will be shown your rating.
  • You have to get 70% of the total items to pass the quiz.
  • You can re-take the quiz as many times as you want or until you are satisfied of your rating.
  • Comment us your thoughts, scores, ratings, and questions about the quiz in the comments section below!

Choose the letter of the best answer in each questions.

What is the maximum collector efficiency of a resistance loaded class A power amplifier?
50%
78.5%
25%
30%

Correct!

Wrong!

The output signal of a common-collector amplifier is always
Larger than the input signal
In phase with the input signal
Out of phase with the input signal
Exactly equal to the input signal

Correct!

Wrong!

Class C amplifiers are used as
AF amplifiers
Small signal amplifiers
RF amplifiers
IF amplifiers

Correct!

Wrong!

In a common emitter amplifier, the capacitor from emitter to ground is called the
Coupling capacitor
Bypass capacitor
Decoupling capacitor
Tuning capacitor

Correct!

Wrong!

If the capacitor from emitter to ground in a common emitter amplifier is removed, the voltage gain
Increases
Decreases
Becomes erratic
Remains the same

Correct!

Wrong!

When negative current feedback is applied to an amplifier, its output impedance
increases
remains unchanged
decreases
becomes zero

Correct!

Wrong!

What is the purpose of dc conditions in a transistor?
To reverse bias the emitter
To forward bias the emitter
To set up operating point
To turn on the transistor

Correct!

Wrong!

An ideal differential amplifiers common mode rejection ratio is
Infinite
Zero
Unity
Undetermined

Correct!

Wrong!

The common base (CB) amplifier has a _______ compared to CE and CC amplifier.
Lower input resistance
Larger current gain
Larger voltage gain
Higher input resistance

Correct!

Wrong!

The output transformer used in a power amplifier is a/an ______ transformer.
1:1 ratio
Step-down
Step-up
Isolation

Correct!

Wrong!

When a transistor amplifier feeds a load of low resistance, its voltage gain will be
Low
Very high
High
Moderate

Correct!

Wrong!

A complementary-symmetry amplifier has
One PNP and one NPN transistor
Two PNP transistors
Two NPN transistors
Two PNP and two NPN transistors

Correct!

Wrong!

The current gain of an emitter follower is
Equal to 1
Greater than 1
Less than 1
Zero

Correct!

Wrong!

What is the device in a transistor oscillator?
LC tank circuit
Biasing circuit
Transistor
Feedback circuit

Correct!

Wrong!

The ______ of a common collector configuration is unity
Voltage gain
Current gain
Power gain
Input impedance

Correct!

Wrong!

What is the purpose of the emitter capacitor?
To forward bias the emitter
To reduce noise in the amplifier
To avoid drop in gain
To stabilize emitter voltage

Correct!

Wrong!

Minimum interference with frequency response can be given by
Direct coupling
RC coupling
Transformer coupling
Instrumentation and control

Correct!

Wrong!

What is the ideal maximum voltage gain of a common collector amplifier?
Unity
Infinite
Indeterminate
Zero

Correct!

Wrong!

The total decibel voltage gain of two cascaded voltage amplifier where individual voltage gains are 10 and 100 is
20
60
800
1000

Correct!

Wrong!

At zero signal condition, a transistor sees ________ load.
dc
ac
both dc and ac
resistive

Correct!

Wrong!

The driver stage usually employs ________ amplifier.
Class A power
Class C
Push-pull
Class AB

Correct!

Wrong!

The ratio output rms power in watts to the input dc power in watts in the different amplifier class is called _______.
Gain
Amplification factor
Efficiency
Phase power

Correct!

Wrong!

Which of the following is the other name of the output stage in an amplifier?
Load stage
Audio stage
Power stage
RF stage

Correct!

Wrong!

Which of the item below does not describe a common emitter amplifier?
High voltage gain
High current gain
Very high power gain
High input resistance

Correct!

Wrong!

For highest power gain, what configuration is used?
CC
CB
CE
CS

Correct!

Wrong!

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Electronic Circuits – Quiz 09

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