Electronic Circuits Practice Quiz 02

Electronic Circuits Practice Quiz 02

Welcome to ECE Board Exam Practice Quiz for Electronic Circuits. This set of practice quiz 2 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.

An AF transformer is shielded to
Keep the amplifier cool
Prevent the induction due to stray magnetic fields
Protect from rusting
Prevent electric shock

Correct!

Wrong!

The voltage gain of a common collector configuration is
Unity
Zero
Very high
Moderate

Correct!

Wrong!

Which configuration has the lowest current gain?
Common-base
Common-collector
Common-emitter
Emitter follower

Correct!

Wrong!

The value of collector load resistance in a transistor amplifier is ________ the output impedance of the transistor.
Equal to
More than
Less than
Not related

Correct!

Wrong!

The input impedance of an amplifier _________ when negative voltage feedback is applied.
Decreases
Becomes zero
Increases
Is unchanged

Correct!

Wrong!

RC coupling is used for _________ amplification.
Voltage
Current
Signal
Power

Correct!

Wrong!

What happens if the input capacitor of a transistor amplifier is short-circuited?
Biasing conditions will change
Transistor will be destroyed
Signal will not reach the base
Biasing will stabilize

Correct!

Wrong!

The collector current in an common base configuration is equal to
Alpha times emitter current plus leakage current
Alpha times base current plus leakage current
Beta times emitter current plus leakage current
Beta times collector current plus leakage current

Correct!

Wrong!

If a transistor is operated in such a way that output current flows for 160 degrees of the input signal, then it is ________ operation.
Class A
Class C
Class B
Class AB

Correct!

Wrong!

To obtain the frequency response curve of an amplifier _______ is kept constant.
Generator output level
Amplifier output
Generator frequency
Amplifier frequency

Correct!

Wrong!

What piece of equipment in an oscilloscope is used to indicate pulse condition in a digital logic circuit?
Probe
Test prods
Connector
Logic probe

Correct!

Wrong!

An oscillator produces ________ oscillations.
Damped
Modulated
Undamped
Sinusoidal

Correct!

Wrong!

What represents common-emitter small signal input resistance?
hie
hfe
hib
hoe

Correct!

Wrong!

The number of stages that can be directly coupled is limited because
Change in temperature can cause thermal instability
Circuit becomes heavily and costly
It becomes difficult to bias the circuit
Circuits’ resistance becomes too large

Correct!

Wrong!

The coupling capacitor Cc must be large enough to _______ in an RC coupling scheme.
Pass dc between the stages
Dissipate high power
Prevent attenuation of low frequency
Prevent attenuation of high frequency

Correct!

Wrong!

Which power amplifier has the highest collector efficiency?
Class A
Class C
Class B
Class AB

Correct!

Wrong!

To obtain good gain stability in a negative feedback amplifier, AB is
Equal to 1
Very much greater than 1
Less than 1
Zero

Correct!

Wrong!

A tuned amplifier uses what load?
Resistive
Capacitive
LC tank
Inductive

Correct!

Wrong!

AC load line has a/an ________ slope compared to that of dc load line.
Zero
Smaller
Bigger
Infinite

Correct!

Wrong!

What type of coupling is generally used in power amplifiers?
Transformer
Direct
RC
Inductive

Correct!

Wrong!

A transistor amplifier has high output impedance because
Emitter is heavily doped
Collector is wider than emitter or base
Collector has reverse bias
Emitter has forward bias

Correct!

Wrong!

The bandwidth of a single stage amplifier is ________ that of multistage amplifier.
Equal to
Less than
More than
Independent

Correct!

Wrong!

Class C is an amplifier whose output current flows for
Less than one-half the entire input cycle
The entire input cycle
Twice the entire input cycle
Greater than one-half the entire input cycle

Correct!

Wrong!

What circuit increases the peak –to-peak voltage, current or power of a signal?
Power supply
Attenuator
Amplifier
Filter

Correct!

Wrong!

Oscillators operate on the principle of
Positive feedback
Negative feedback
Signal feedthrough
Attenuation

Correct!

Wrong!

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Electronic Circuits – Quiz 02

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