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Electronics Test Questions and Answers: A Comprehensive Guide, Exams of Electrical and Electronics Engineering

Adler UniversityElectrical and Electronics Engineering

A comprehensive set of questions and answers related to electronics, covering various topics such as circuits, transistors, oscillators, and amplifiers. It is a valuable resource for students studying electronics, offering insights into key concepts and practical applications. Well-organized and presents information in a clear and concise manner, making it easy to understand and learn from.

Typology: Exams

2024/2025

Available from 02/11/2025

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ATT TEST 6 LATEST TEST 2025 | ALL QUESTIONS
AND CORRECT ANSWERS | GRADED A+ | NEWEST
TEST | VERIFIED ANSWERS
How many circuits do the turner block contain? What does each one do? ---
------CORRECT ANSWER-----------------Tuner contains 3 circuits.
(RF Amplifier- selects and amplifies one frequency from the many picked
up by the antenna.
Local Oscillator- produces a frequency 455 KHz above the selected RF.
Mixer- produces four frequencies)
What is LO, RF, LO+RF, and LO-RF? ---------CORRECT ANSWER-----------
------LO Frequency- 455 KHz
LO+RF- Adds 455 KHz to the RF.
RF- Given number
LO-RF- is also referred to as the intermediate frequency (IF).
The transistors in a Multivibrator are biased so.... ---------CORRECT
ANSWER-----------------That they are either in cutoff or saturation.
When a transistor in a Multivibrator is ON, it's output voltage is ________. -
--------CORRECT ANSWER-----------------LOW
In a Multivibrator, what is meant by a transistor being on? ---------
CORRECT ANSWER-----------------The transistor is in saturation.
Free running Multivibrators generate a square wave output.... ---------
CORRECT ANSWER-----------------Anytime the operating voltage is applied.
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Download Electronics Test Questions and Answers: A Comprehensive Guide and more Exams Electrical and Electronics Engineering in PDF only on Docsity!

ATT TEST 6 LATEST TEST 2025 | ALL QUESTIONS

AND CORRECT ANSWERS | GRADED A+ | NEWEST

TEST | VERIFIED ANSWERS

How many circuits do the turner block contain? What does each one do? --- ------CORRECT ANSWER-----------------Tuner contains 3 circuits. (RF Amplifier- selects and amplifies one frequency from the many picked up by the antenna. Local Oscillator- produces a frequency 455 KHz above the selected RF. Mixer- produces four frequencies) What is LO, RF, LO+RF, and LO-RF? ---------CORRECT ANSWER----------- ------LO Frequency- 455 KHz LO+RF- Adds 455 KHz to the RF. RF- Given number LO-RF- is also referred to as the intermediate frequency (IF). The transistors in a Multivibrator are biased so.... ---------CORRECT ANSWER-----------------That they are either in cutoff or saturation. When a transistor in a Multivibrator is ON, it's output voltage is ________. - --------CORRECT ANSWER-----------------LOW In a Multivibrator, what is meant by a transistor being on? --------- CORRECT ANSWER-----------------The transistor is in saturation. Free running Multivibrators generate a square wave output.... --------- CORRECT ANSWER-----------------Anytime the operating voltage is applied.

In an astable Multivibrator, what determines which transistor turns ON when power is first applied? ---------CORRECT ANSWER-----------------The transistor that conducts first. What type of operation does a monostable Multivibrator use? --------- CORRECT ANSWER-----------------Triggered What is the frequency of any monostable Multivibrator? ---------CORRECT ANSWER-----------------The same as the input The frequency of an monostable Multivibrator is determined by____________. ---------CORRECT ANSWER-----------------The input trigger frequency Most faults in Multivibrators result in.... ---------CORRECT ANSWER---------- -------Either no output or a Vcc level on the output A Schmitt trigger produces a high output only when __________. --------- CORRECT ANSWER-----------------The upper threshold level is exceeded. Schmitt triggers are also called ___________. ---------CORRECT ANSWER-----------------Squaring amplifiers

An arrow that points right (in) indicates what type of FET? --------- CORRECT ANSWER-----------------N Channel FET An arrow that points left (out) indicates what type of FET? --------- CORRECT ANSWER-----------------P Channel FET Electrons enter the FET from the... ---------CORRECT ANSWER--------------- --Source Electrons leave the FET from the ... ---------CORRECT ANSWER-------------- ---Drain The_____ Controls Electron flow. ---------CORRECT ANSWER----------------- Gate N Channel FET's operate by placing... ---------CORRECT ANSWER----------- ------Positive charge on the Drain. What is the purpose of a sine wave oscillator? ---------CORRECT ANSWER-----------------Convert DC Energy to sinusoidal AC Energy. What is the purpose of a Hartley Oscillator? ---------CORRECT ANSWER--- --------------Convert DC Energy to sinusoidal AC Energy.

What is the purpose of a colpitts oscillator? ---------CORRECT ANSWER---- -------------Convert DC Energy to sinusoidal AC Energy. What is the purpose of a RC phase shift oscillator? ---------CORRECT ANSWER-----------------Convert DC Energy to sinusoidal AC Energy. What is the purpose of a crystal oscillator? ---------CORRECT ANSWER----- ------------Convert DC Energy to sinusoidal AC energy. What is the purpose of a sawtooth generator? ---------CORRECT ANSWER-----------------Convert square wave energy to a sawtooth waveform. The FET is a ___________. ---------CORRECT ANSWER----------------- Unipolar Device The element that current carries enter the FET through is called? --------- CORRECT ANSWER-----------------Source The element that current carriers leave through is called? --------- CORRECT ANSWER-----------------Drain

How is frequency determined in a colpitts oscillator? ---------CORRECT ANSWER-----------------Frequency is determined by the components in the feedback circuit. How is an RC Phase Shift oscillator identified? ---------CORRECT ANSWER-----------------They have three RC networks in the feedback circuit. What is the total phase shift in an RC Phase shift oscillator? --------- CORRECT ANSWER-----------------360 degrees. Q1 is a common emitter amplifier that produces a 180 degree phase shift. Each RC network produces a phase shift as well. How is frequency determined with the sawtooth oscillator? --------- CORRECT ANSWER-----------------The frequency of the output is determined by the frequency of the input. What is the purpose of a blocking oscillator? ---------CORRECT ANSWER-- ---------------They change DC into short, rectangular pulses that can be used as timing pulses to trigger other circuits. Blocking Oscillator ---------CORRECT ANSWER-----------------Any oscillator that cuts off its own oscillations at a predetermined time. Transconductance (gm) ---------CORRECT ANSWER-----------------The amount of control that the input voltage has over the output current. Gm= Ioutput/Einput

Name the 3 multivibrators whose purpose is to convert DC Energy to square wave energy. ---------CORRECT ANSWER-----------------1. Astable Multivibrator

  1. Monostable Multivibrator
  2. Bistable Multivibrator Helps to convert DC energy to square wave energy ---------CORRECT ANSWER-----------------Astable Multivibrator Converts DC energy to square wave energy ---------CORRECT ANSWER--- --------------Monostable Multivibrator Converts DC energy to square waves ---------CORRECT ANSWER----------- ------Bistable Multivibrator What type of blocking oscillator is a monostable Multivibrator? --------- CORRECT ANSWER-----------------Trigger How is the output frequency determined in a bistable Multivibrator? --------- CORRECT ANSWER-----------------The output frequency is one half the input trigger frequency. What is the purpose of a Schmitt trigger? ---------CORRECT ANSWER------- ----------To convert any input waveform of any shape and amplitude into square wave pulses of constant amplitude.

What are AM receivers? What does the AM broadcast band cover? --------- CORRECT ANSWER-----------------AM receivers are electronic devices that pick up signals sent from AM transmitters. Frequencies go from 535 KHz to 1605 KHz Which is the most widely used FET? ---------CORRECT ANSWER------------- ----Common Source What is Calculated Av? ---------CORRECT ANSWER-----------------Gm*Rd What are common gate FET normally used as? ---------CORRECT ANSWER-----------------Switch What are Common Source and Common Drain FETs normally used for? --- ------CORRECT ANSWER-----------------Amplifiers Forward biased measurements indicate what? ---------CORRECT ANSWER-----------------Normal resistance reading is low. A high reading indicates an Open FET. Reversed biased measurements indicate what? ---------CORRECT ANSWER-----------------Normal resistance measurement is high. A low reading indicates a shorted FET. With the diode test function, how many directions should current flow? ------ ---CORRECT ANSWER-----------------One

What is Amplitude Modulation? ---------CORRECT ANSWER----------------- Occurs when the carrier frequency is altered in the amplitude by the lower intelligence frequency. FET's require ____ Bias to operate. ---------CORRECT ANSWER-------------- ---Negative Increasing Reverse Bias VGS... ---------CORRECT ANSWER----------------- Decreases Id Decreasing Reverse Bias of VGS... ---------CORRECT ANSWER-------------- ---Increases Id Positive Bias Voltage (VDD) is applied to the... N Channel FET ---------CORRECT ANSWER-----------------The Drain Positive Bias Voltage on the Drain produces... N Channel FET ---------CORRECT ANSWER-----------------Current flow _____ Bias Voltage (VGG) is applied to the _____. ---------CORRECT ANSWER-----------------Negative/Gate

Mixer ---------CORRECT ANSWER-----------------produces four frequencies