Questions & Answers
Browse all 20 questions from the
Electrical Engineering Essentials study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
Which subatomic particle is primarily responsible for the flow of electric current in a copper wire?
-
A
Proton
-
B
Neutron
-
C
Electron
-
D
Positron
2
What is the standard SI unit used to measure electrical resistance?
-
A
Volt
-
B
Ohm
-
C
Ampere
-
D
Watt
3
In an electrical circuit, what does a capacitor primarily store?
-
A
Magnetic energy
-
B
Chemical energy
-
C
Electric charge
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D
Thermal energy
4
Which component is designed to allow current to flow in only one direction?
-
A
Resistor
-
B
Diode
-
C
Capacitor
-
D
Transformer
5
What is the primary function of a transformer in an electrical power grid?
-
A
To store excess electricity
-
B
To convert AC to DC
-
C
To change voltage levels
-
D
To measure current flow
6
Which material is considered a semiconductor commonly used to make computer chips?
-
A
Copper
-
B
Silicon
-
C
Rubber
-
D
Gold
7
What does the acronym LED stand for in electrical engineering?
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A
Light Emitting Diode
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B
Low Energy Device
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C
Linear Electric Drive
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D
Light Electric Display
8
According to Ohm's Law, what is the relationship between Voltage (V), Current (I), and Resistance (R)?
-
A
V = I / R
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B
V = I * R
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C
V = R / I
-
D
V = I + R
9
What is the purpose of a fuse in an electrical circuit?
-
A
To increase voltage
-
B
To store electricity
-
C
To break the circuit during an overload
-
D
To convert current to heat
10
Which device is used to measure the electric potential difference between two points?
-
A
Ammeter
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B
Voltmeter
-
C
Ohmmeter
-
D
Galvanometer
11
In a series circuit, what remains constant across all components?
-
A
Voltage
-
B
Current
-
C
Resistance
-
D
Power
12
What is the unit of electrical power?
-
A
Joule
-
B
Watt
-
C
Volt-Ampere
-
D
Coulomb
13
Which law states that the sum of currents entering a junction must equal the sum of currents leaving it?
-
A
Ohm's Law
-
B
Faraday's Law
-
C
Kirchhoff's Current Law
-
D
Coulomb's Law
14
What type of electricity flows in one constant direction?
-
A
Alternating Current (AC)
-
B
Direct Current (DC)
-
C
Static Electricity
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D
Electromagnetic Pulse
15
What do we call a material that strongly opposes the flow of electric current?
-
A
Conductor
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B
Insulator
-
C
Semiconductor
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D
Superconductor
16
Which part of a circuit produces a magnetic field when current flows through it?
-
A
Resistor
-
B
Capacitor
-
C
Inductor
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D
Switch
17
What is the primary metal used in most electrical wiring due to its high conductivity?
-
A
Iron
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B
Copper
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C
Aluminum
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D
Lead
18
What happens to the total resistance in a circuit if you add more resistors in parallel?
-
A
It increases
-
B
It decreases
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C
It stays the same
-
D
It doubles
19
What is the term for the opposition to the flow of alternating current in a capacitor or inductor?
-
A
Resistance
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B
Reactance
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C
Conductance
-
D
Impedance
20
Which frequency of alternating current is used in most Australian household outlets?
-
A
50 Hz
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B
60 Hz
-
C
100 Hz
-
D
120 Hz
