Master Analog Electronics Concepts: Quizzes and Practice Questions

Question 1

In an amplifier circuit, what is the primary function of a feedback resistor?

Accepted Answer

To decrease the gain of the amplifier

Answer

To increase the bandwidth of the amplifier

Answer

To reduce the input impedance of the amplifier

Answer

To increase the output impedance of the amplifier

Question 2

What is the primary purpose of using a low-pass filter in an electronic system?

Accepted Answer

To attenuate high-frequency signals

Answer

To amplify low-frequency signals

Answer

To oscillate at a defined frequency

Answer

To convert AC signals to DC signals

Question 3

Which of the following is a key parameter of an amplifier, used to measure its ability to amplify signals?

Accepted Answer

Gain

Answer

Bandwidth

Answer

Impedance

Answer

Phase shift

Question 4

In a Colpitts oscillator, which circuit components form the resonant tank?

Accepted Answer

Inductor and capacitor

Answer

Resistor and capacitor

Answer

Inductor and resistor

Answer

Capacitor and transformer

Question 5

Which of the following is not a type of analog filter?

Accepted Answer

Digital filter

Answer

Low-pass filter

Answer

High-pass filter

Answer

Band-pass filter

Question 6

What is the purpose of employing a potentiometer in an amplifier circuit?

Accepted Answer

To control the amplifier's gain

Answer

To limit the output current

Answer

To provide a bias voltage

Answer

To stabilize the operating point

Question 7

Which of the following is a distinctive characteristic of a class A amplifier?

Accepted Answer

Low distortion

Answer

High efficiency

Answer

High power output

Answer

Wide bandwidth

Question 8

What is the main application of a phase-shift oscillator?

Accepted Answer

Generating low-frequency sine waves

Answer

Amplifying high-frequency signals

Answer

Filtering out unwanted noise

Answer

Converting DC signals to AC signals

Question 9

Which of the following is a defining feature of an amplifier circuit?

Accepted Answer

High input impedance and low output impedance

Answer

Low input impedance and high output impedance

Answer

Equal input and output impedances

Answer

Negative gain

Question 10

What is the main purpose of an oscillator circuit?

Accepted Answer

To produce periodic waveforms

Answer

To enhance signals

Answer

To eliminate unwanted frequencies

Answer

To regulate voltage levels

Question 11

Which type of filter is designed to permit only high-frequency signals to pass through?

Accepted Answer

High-pass filter

Answer

Low-pass filter

Answer

Band-pass filter

Answer

Band-reject filter

Question 12

In an AC circuit, what is the function of a capacitor?

Accepted Answer

Energy storage

Answer

DC current blockage

Answer

Voltage regulation

Answer

Signal amplification

Question 13

Which parameter is crucial to consider when analyzing an inductor?

Accepted Answer

Inductance

Answer

Resistance

Answer

Capacitance

Answer

Voltage

Question 14

What is the primary reason for using a transformer in an AC circuit?

Accepted Answer

Voltage level adjustment

Answer

Circuit isolation

Answer

Current regulation

Answer

Signal amplification

Question 15

In a Butterworth filter, the slope of the attenuation curve in the passband region is:

Accepted Answer

12 dB/octave

Answer

6 dB/octave

Answer

18 dB/octave

Answer

24 dB/octave

Question 16

A silicon diode typically exhibits a forward voltage drop of approximately:

Accepted Answer

0.7 V

Answer

0.2 V

Answer

1.2 V

Answer

1.7 V

Question 17

In an amplifier circuit, which of the following is NOT a type of negative feedback?

Accepted Answer

Positive feedback

Answer

Voltage feedback

Answer

Current feedback

Answer

Power feedback

Question 18

In a parallel resonant circuit, the resonant frequency is:

Accepted Answer

Equal to the frequency at which the inductive and capacitive reactances are equal

Answer

Higher than the frequency at which the inductive and capacitive reactances are equal

Answer

Lower than the frequency at which the inductive and capacitive reactances are equal

Answer

Zero

Question 19

Which of the following is the unit of electrical inductance?

Accepted Answer

Henry

Answer

Farad

Answer

Ohm

Answer

Volt

Question 20

An analog-to-digital converter (ADC) is a device that performs which of the following functions?

Accepted Answer

Converts analog signals to digital signals

Answer

Converts digital signals to analog signals

Answer

Converts AC signals to DC signals

Answer

Converts DC signals to AC signals

Question 21

In a negative feedback amplifier, how does the output signal relate to the input signal?

Accepted Answer

180 degrees out of phase with the input signal

Answer

In phase with the input signal

Answer

90 degrees out of phase with the input signal

Answer

Shifted by 90 degrees in phase

Question 22

An ideal operational amplifier (op-amp) does NOT possess which of the following characteristics?

Accepted Answer

Limited open-loop gain

Answer

Infinite input impedance

Answer

Zero output impedance

Answer

Non-inverting input is positive

Question 23

Hartley oscillators fall into which category of oscillator type?

Accepted Answer

LC oscillators

Answer

RC oscillators

Answer

Crystal oscillators

Answer

Wien bridge oscillators

Question 24

Which factors determine the bandwidth of an amplifier?

Accepted Answer

Lower and upper cutoff frequencies

Answer

Gain and phase shift

Answer

Input and output impedance

Answer

Power and efficiency

Question 25

What is a significant advantage of utilizing a differential amplifier?

Accepted Answer

Rejection of common-mode noise

Answer

High gain

Answer

Low power consumption

Answer

Wide bandwidth

Question 26

Class A amplifiers are characterized by what state of their output transistors?

Accepted Answer

Always turned on

Answer

Always turned off

Answer

Turned on only when the input signal is positive

Answer

Turned on only when the input signal is negative

Question 27

Which feedback network type is commonly employed in operational amplifiers?

Accepted Answer

Negative feedback

Answer

Positive feedback

Answer

Series-shunt feedback

Answer

Voltage-current feedback

Question 28

The Barkhausen criterion for oscillation pertains to which aspect of an oscillator?

Accepted Answer

Loop gain and phase shift

Answer

Input and output impedance

Answer

Power supply voltage and load current

Answer

Capacitance and inductance values

Question 29

Which of the listed options does NOT represent a type of analog-to-digital converter (ADC)?

Accepted Answer

Pulse-width modulation

Answer

Successive approximation

Answer

Flash

Answer

Charge balancing

Question 30

An operational amplifier (op-amp) is a widely used electronic device. Which of the following is NOT a key feature of an op-amp?

Accepted Answer

Voltage gain less than unity

Answer

High input impedance

Answer

Low output impedance

Answer

Differential inputs

Question 31

In an oscillator circuit, which component primarily determines the frequency of oscillation?

Accepted Answer

Capacitor

Answer

Resistor

Answer

Inductor

Answer

Diode

Question 32

What is the primary purpose of negative feedback in an amplifier circuit?

Accepted Answer

Reduce distortion

Answer

Increase voltage gain

Answer

Increase bandwidth

Answer

Decrease input impedance

Question 33

Which of the following is NOT an application of analog electronics?

Accepted Answer

Digital signal processing

Answer

Audio amplifiers

Answer

Medical imaging

Answer

Control systems

Question 34

What is the main function of a voltage regulator?

Accepted Answer

Maintain a stable output voltage

Answer

Amplify input signals

Answer

Filter out noise

Answer

Convert AC to DC

Question 35

Which type of filter is composed of resistors, capacitors, and/or inductors without the use of active components?

Accepted Answer

Passive filter

Answer

Active filter

Answer

Digital filter

Answer

Mechanical filter

Question 36

Classify the configuration that is **not** an amplifier configuration type?

Accepted Answer

Series-parallel

Answer

Common-emitter

Answer

Common-collector

Answer

Common-base

Question 37

Identify the function of a low-pass filter?

Accepted Answer

To allow passage of low-frequency signals while attenuating high-frequency signals

Answer

To amplify both low- and high-frequency signals equally

Answer

To pass high-frequency signals while attenuating low-frequency signals

Question 38

What is the designated purpose of negative feedback in an amplifier circuit?

Accepted Answer

To reduce distortion and improve stability

Answer

To augment gain

Answer

To minimize bandwidth

Question 39

Indicate the primary application of a Zener diode.

Accepted Answer

Voltage regulation

Answer

Rectification

Answer

Amplification

Question 40

Explain the purpose of a Darlington pair.

Accepted Answer

To amplify current

Answer

To isolate input and output signals

Answer

To amplify voltage

Answer

To diminish input impedance

Question 41

Indicate the characteristic of an ideal inductor.

Accepted Answer

Zero resistance

Answer

Infinite capacitance

Answer

Non-linearity

Question 42

Indicate the unit of measurement for capacitance.

Accepted Answer

Farad

Answer

Henry

Answer

Ohm