30 Electronics Quiz Questions and Answers

Electronics is a field of science and engineering that deals with the study, design, and application of devices and circuits that use the flow of electrons to process and transmit information or perform various functions. It encompasses a wide range of technologies and applications, playing a crucial role in modern society.

Electronic devices consist of semiconductor components, such as transistors, diodes, and integrated circuits, which manipulate the flow of electrical currents to perform specific tasks. These devices are at the heart of many technologies we use daily, including computers, smartphones, televisions, radios, and various household appliances.

The field of electronics has evolved significantly over the years, leading to the development of complex systems, such as microprocessors, digital signal processors, and memory chips, which have revolutionized computing and communication. Advancements in electronics have enabled the miniaturization of components, leading to smaller, more powerful, and energy-efficient devices.

Electronics also plays a crucial role in telecommunications, enabling the transmission of data and voice over long distances through various communication systems, such as fiber-optic networks and wireless technologies.

Article overview

• Part 1: 30 electronics quiz questions & answers
• Part 2: Download electronics questions & answers for free
• Part 3: Free online quiz software – OnlineExamMaker

Part 1: 30 electronics quiz questions & answers

1. What is electronics?
a) The study of plants and animals
b) The study of electrical circuits and components
c) The study of chemical reactions
d) The study of rocks and minerals
Answer: b) The study of electrical circuits and components

2. Which of the following is an example of an electronic device?
a) Bicycle
b) Microwave oven
c) Hammer
d) Toaster
Answer: b) Microwave oven

3. What are semiconductor devices primarily made of?
a) Copper
b) Aluminum
c) Silicon
d) Iron
Answer: c) Silicon

4. Which component is used to amplify electrical signals in electronic circuits?
a) Resistor
b) Capacitor
c) Diode
d) Transistor
Answer: d) Transistor

5. What is the basic unit of digital information in electronics?
a) Ampere
b) Volt
c) Ohm
d) Bit
Answer: d) Bit

6. What does LED stand for in electronics?
a) Long Electric Diode
b) Light Emitting Device
c) Light Emitting Diode
d) Long Electric Device
Answer: c) Light Emitting Diode

7. What type of current do batteries typically produce?
a) Alternating Current (AC)
b) Direct Current (DC)
c) Oscillating Current (OC)
d) Varying Current (VC)
Answer: b) Direct Current (DC)

8. Which electronic component stores electrical charge temporarily and releases it when needed?
a) Resistor
b) Capacitor
c) Inductor
d) Diode
Answer: b) Capacitor

9. What is the function of a diode in an electronic circuit?
a) To store electrical energy
b) To amplify electrical signals
c) To convert AC to DC
d) To measure electrical current
Answer: c) To convert AC to DC

10. What does IC stand for in electronics?
a) Integrated Circuit
b) Intelligent Computer
c) Inductor Capacitor
d) Internal Circuit
Answer: a) Integrated Circuit

11. Which type of circuit allows current to flow in only one direction?
a) Parallel circuit
b) Series circuit
c) Open circuit
d) Diode circuit
Answer: d) Diode circuit

12. What is the SI unit of electrical resistance?
a) Watt
b) Volt
c) Ampere
d) Ohm
Answer: d) Ohm

13. What does AC stand for in electronics?
a) Alternating Current
b) Automatic Circuit
c) Advanced Capacitor
d) Adjustable Current
Answer: a) Alternating Current

14. Which electronic component is used to regulate voltage in a circuit?
a) Resistor
b) Capacitor
c) Inductor
d) Voltage regulator
Answer: d) Voltage regulator

15. What is the basic function of a transistor in electronic circuits?
a) To store data
b) To amplify or switch electronic signals
c) To measure resistance
d) To generate electrical power
Answer: b) To amplify or switch electronic signals

Part 2: Download electronics questions & answers for free

16. What type of electronic device is used to store digital data in computers?
a) Capacitor
b) Resistor
c) Transistor
d) Memory chip
Answer: d) Memory chip

17. Which electronic component allows current to flow in both directions?
a) Resistor
b) Capacitor
c) Diode
d) Inductor
Answer: c) Diode

18. What is the role of a relay in electronics?
a) To amplify electrical signals
b) To switch high-power circuits using a low-power control signal
c) To store and release electrical charge
d) To regulate voltage in a circuit
Answer: b) To switch high-power circuits using a low-power control signal

19. Which type of circuit has only one path for current flow?
a) Parallel circuit
b) Series circuit
c) Open circuit
d) Diode circuit
Answer: b) Series circuit

20. What is the purpose of a resistor in an electronic circuit?
a) To amplify electrical signals
b) To store electrical charge
c) To regulate voltage
d) To limit the flow of current
Answer: d) To limit the flow of current

21. What is the main function of a capacitor in a power supply circuit?
a) To convert AC to DC
b) To store electrical energy
c) To amplify electrical signals
d) To regulate voltage
Answer: b) To store electrical energy

22. Which electronic component is used to step up or step down voltage in a transformer?
a) Capacitor
b) Diode
c) Resistor
d) Inductor
Answer: d) Inductor

23. What is the function

of a potentiometer in an electronic circuit?
a) To store electrical charge
b) To regulate voltage
c) To measure resistance
d) To provide variable resistance
Answer: d) To provide variable resistance

24. Which type of electronic device allows current to flow freely in both directions?
a) Resistor
b) Capacitor
c) Diode
d) Transistor
Answer: c) Diode

25. Which type of electronic component is used to store and maintain data in non-volatile memory?
a) Capacitor
b) Diode
c) Transistor
d) Flash memory
Answer: d) Flash memory

26. What is the purpose of a voltage regulator in an electronic circuit?
a) To amplify electrical signals
b) To store and release electrical charge
c) To regulate voltage and maintain a constant output
d) To convert AC to DC
Answer: c) To regulate voltage and maintain a constant output

27. Which type of circuit allows current to take multiple paths?
a) Parallel circuit
b) Series circuit
c) Closed circuit
d) Diode circuit
Answer: a) Parallel circuit

28. What does PWM stand for in electronics?
a) Pulse Width Modulation
b) Power Watt Management
c) Programmable Wave Module
d) Power Width Modulation
Answer: a) Pulse Width Modulation

29. What does VLSI stand for in electronics?
a) Voltage-Level Signal Integration
b) Very Large System Integration
c) Very Low-Speed Input
d) Very Large Scale Integration
Answer: d) Very Large Scale Integration

30. Which electronic component is used to amplify electrical signals in audio systems?
a) Resistor
b) Capacitor
c) Amplifier
d) Diode
Answer: c) Amplifier

Part 3: Best online quiz making platform – OnlineExamMaker

Save time and effort with automated grading, instantly generating scores and results for each respondent. OnlineExamMaker grades your quizzes automatically, and provides valuable insights for performance evaluation. Whether you are an educator looking to engage students or a business professional seeking effective training methods, OnlineExamMaker quiz maker is a reliable and efficient solution that streamlines the assessment process for improved learning outcomes.