30 Electrical Engineering Quiz Questions and Answers

Electrical engineering is a branch of engineering that deals with the study, design, and application of electrical systems and technologies. It encompasses a wide range of topics related to electricity, electronics, and electromagnetism. Electrical engineers are responsible for designing, developing, testing, and maintaining various electrical and electronic systems, components, and devices used in almost every aspect of modern life.

Key Areas of Electrical Engineering:

Circuit Theory: Electrical engineers study the behavior of electrical circuits, which are the paths through which electric currents flow. They analyze circuits to understand voltage, current, and power distribution.

Electronics: This area focuses on the design and development of electronic components and devices, such as transistors, integrated circuits, and microcontrollers.

Power Systems: Power systems engineering deals with the generation, transmission, distribution, and utilization of electrical power. It includes power plants, transformers, power lines, and electrical grids.

Control Systems: Control systems engineering involves designing systems that regulate and control the behavior of other systems. This area is crucial in automation and robotics.

Communication Systems: Electrical engineers work on the design and optimization of communication systems, including wireless networks, fiber optics, and satellite communication.

Digital Signal Processing (DSP): DSP involves the manipulation and analysis of signals, such as audio, images, and video, using digital processing techniques.

Renewable Energy: With a growing focus on sustainability, electrical engineers are involved in the development of renewable energy technologies like solar power, wind energy, and hydroelectric power.

Article overview

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

Part 1: 30 electrical engineering quiz questions & answers

1. What is the unit of electrical current?
a) Ohm
b) Volt
c) Ampere
d) Watt

Answer: c) Ampere

2. Which law states that the current passing through a conductor is directly proportional to the voltage across it, provided its temperature remains constant?
a) Ohm’s Law
b) Faraday’s Law
c) Gauss’s Law
d) Kirchhoff’s Law

Answer: a) Ohm’s Law

3. What is the SI unit of electric charge?
a) Ampere
b) Volt
c) Coulomb
d) Ohm

Answer: c) Coulomb

4. Which component is used to store electric charge in a circuit?
a) Resistor
b) Capacitor
c) Inductor
d) Diode

Answer: b) Capacitor

5. What is the unit of electrical resistance?
a) Ohm
b) Volt
c) Ampere
d) Coulomb

Answer: a) Ohm

6. Which type of current flows only in one direction?
a) Alternating Current (AC)
b) Direct Current (DC)
c) Both AC and DC
d) None of the above

Answer: b) Direct Current (DC)

7. What is the purpose of a diode in a circuit?
a) To regulate voltage
b) To store electric charge
c) To allow current flow in one direction only
d) To amplify signals

Answer: c) To allow current flow in one direction only

8. Which component is used to step-up or step-down voltage in a circuit?
a) Resistor
b) Capacitor
c) Transformer
d) Diode

Answer: c) Transformer

9. What is the unit of electrical power?
a) Ohm
b) Volt
c) Watt
d) Coulomb

Answer: c) Watt

10. What is the function of a relay in an electrical circuit?
a) To control current flow
b) To amplify signals
c) To switch high currents using a small current
d) To store electric charge

Answer: c) To switch high currents using a small current

11. Which law states that the total current entering a junction in a circuit is equal to the total current leaving the junction?
a) Ohm’s Law
b) Faraday’s Law
c) Gauss’s Law
d) Kirchhoff’s Current Law

Answer: d) Kirchhoff’s Current Law

12. Which law states that the total voltage around any closed loop in a circuit is equal to the sum of the voltage drops across the components in that loop?
a) Ohm’s Law
b) Faraday’s Law
c) Gauss’s Law
d) Kirchhoff’s Voltage Law

Answer: d) Kirchhoff’s Voltage Law

13. What is the function of a resistor in an electrical circuit?
a) To regulate voltage
b) To store electric charge
c) To allow current flow in one direction only
d) To limit the flow of current

Answer: d) To limit the flow of current

14. What is the primary function of a transformer in the power distribution system?
a) To store electric charge
b) To regulate voltage
c) To step-up or step-down voltage
d) To rectify current

Answer: c) To step-up or step-down voltage

15. Which component is used to protect electrical circuits from excessive current and prevent damage?
a) Resistor
b) Capacitor
c) Fuse
d) Transistor

Answer: c) Fuse

Part 2: Download electrical engineering questions & answers for free

16. Which device is used to convert alternating current (AC) to direct current (DC)?
a) Resistor
b) Capacitor
c) Transformer
d) Rectifier

Answer: d) Rectifier

17. What is the purpose of a transistor in an electronic circuit?
a) To regulate voltage
b) To amplify signals
c) To store electric charge
d) To limit the flow of current

Answer: b) To amplify signals

18. What is the unit of electrical capacitance?
a) Farad
b) Volt
c) Ampere
d) Ohm

Answer: a) Farad

19. Which component is used to store electric energy in a battery?
a) Resistor
b) Capacitor
c) Inductor
d) Cell

Answer: d) Cell

20. Which type of electrical connection is commonly used in household wiring?
a) Series connection
b) Parallel connection
c) Mixed connection
d) Serial connection

Answer: b) Parallel connection

21. What is the purpose of an inductor in an electrical circuit?
a) To regulate voltage
b) To store electric charge
c) To allow current flow in one direction only
d) To store magnetic energy

Answer: d) To store magnetic energy

22. Which law states that the induced electromotive force (EMF) in a closed circuit is directly proportional to the rate of change of magnetic flux through the circuit?
a) Ohm’s Law
b) Faraday’s Law
c) Gauss’s Law
d) Kirchhoff’s Law

Answer: b) Faraday’s Law

23. Which type of motor is commonly used in household appliances like fans and refrigerators?
a) AC motor
b) DC motor
c) Stepper motor
d) Brushless motor

Answer: a) AC motor

24. Which electrical component is used to protect sensitive electronic circuits from voltage spikes and surges?
a) Resistor
b) Capacitor
c) Transistor
d) Surge protector

Answer: d) Surge protector

25. What is the purpose of a potentiometer in an electrical circuit?
a) To control current flow
b) To amplify signals
c) To regulate voltage
d) To vary the resistance in a circuit

Answer: d) To vary the resistance in a circuit

26. What is the unit of electrical frequency?
a) Hertz
b) Volt
c) Ampere
d) Ohm

Answer: a) Hertz

27. Which law states that the magnetic field induced around a current-carrying conductor forms concentric circles?
a) Ohm’s Law
b) Faraday’s Law
c) Gauss’s Law
d) Ampere’s Law

Answer: d) Ampere’s Law

28. What is the purpose of a galvanometer in an electrical circuit?
a) To measure electrical resistance
b) To measure electrical current
c) To measure electrical voltage
d) To measure electrical power

Answer: b) To measure electrical current

29. Which type of electrical connection is commonly used in battery packs to increase the overall voltage?
a) Series connection
b) Parallel connection
c) Mixed connection
d) Serial connection

Answer: a) Series connection

30. Which component is used to amplify and switch electronic signals in electronic devices?
a) Resistor
b) Capacitor
c) Transistor
d) Transformer

Answer: c) Transistor

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