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Electrical Engineering Fundamentals

Electrical Engineering

A challenging quiz covering fundamental electrical engineering concepts and principles.

engineering physics electricity

15 Questions Hard Ages 18+ Jul 15, 2026

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About this Study Set

This study set covers Electrical Engineering through 15 practice questions. A challenging quiz covering fundamental electrical engineering concepts and principles. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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Browse all 15 questions from the Electrical Engineering Fundamentals study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 In a three-phase electrical system, what is the phase difference between each of the three voltage waveforms?

A 45 degrees
B 90 degrees
C 120 degrees
D 180 degrees

2 What is the unit of magnetic flux density?

A Weber
B Tesla
C Henry
D Ampere-turn

3 According to Lenz's Law, the direction of an induced electromotive force is such that it opposes what?

A The applied voltage
B The change in magnetic flux
C The flow of electrons
D The electrical resistance

4 In a semiconductor, what is the 'band gap' energy primarily responsible for defining?

A Thermal conductivity
B Electrical conductivity
C Dielectric constant
D Magnetic permeability

5 Which component is specifically designed to store energy in an electric field?

A Inductor
B Resistor
C Capacitor
D Transistor

6 What does the 'skin effect' in AC transmission lines describe?

A Increased resistance at the surface of a conductor
B Increased magnetic field at the center of a conductor
C Decreased current density at the center of a conductor
D Thermal insulation of cable jackets

7 What is the primary function of a transformer core made of laminated steel sheets?

A To increase voltage
B To minimize eddy current losses
C To improve tensile strength
D To facilitate cooling

8 In power systems, what does a Power Factor of 1.0 indicate?

A A purely inductive load
B A purely capacitive load
C A purely resistive load
D A short circuit

9 What type of feedback is required for an electronic circuit to function as an oscillator?

A Negative feedback
B Positive feedback
C No feedback
D Differential feedback

10 Which fundamental law states that the sum of currents entering a junction equals the sum of currents leaving it?

A Ohm's Law
B Kirchhoff's Current Law
C Faraday's Law
D Ampere's Law

11 What is the effect of increasing the frequency on the inductive reactance of a circuit?

A It remains constant
B It decreases linearly
C It increases linearly
D It decreases exponentially

12 Which material is commonly used as the dielectric in high-voltage capacitors due to its high dielectric strength?

A Copper
B Aluminum
C Mica
D Rubber

13 In an ideal operational amplifier, what is the input impedance?

A Zero
B Finite
C Infinite
D Negative

14 Which condition must be met for maximum power transfer from a source to a load in a DC circuit?

A Source voltage must equal load voltage
B Source resistance must equal load resistance
C Source current must equal load current
D Source resistance must be zero

15 What is the primary purpose of a 'bleeder resistor' in a high-voltage power supply?

A To reduce output voltage
B To dissipate energy for safety when turned off
C To increase current capacity
D To provide surge protection

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