Electrical Theory – Pro-Class Certification
Examination (2026 Edition) | Advanced
Certification Practice Examination | High-
Difficulty Multiple-Choice Questions with
Verified Answers & Detailed Rationales
Advanced Professional Practice Examination
Subject: Electrical Theory
Difficulty: Pro-Class / Expert Level
Coverage: DC Circuits, AC Theory, Electromagnetism, Three-
Phase Systems, Transformers, Electrical Machines, Power
Factor, Harmonics, Protection, Measurements, Electrical Safety,
Modern Electrical Principles.
Question 1
A 24 V DC source supplies a circuit with a resistance of 6 Ω.
What is the circuit current?
A. 2 A
B. 3 A
C. 4 A
D. 6 A
Answer: C
,Rationale: Using Ohm's Law, I = V/R = 24/6 = 4 A.
Question 2
Which law states that the algebraic sum of currents entering a
junction equals the sum leaving it?
A. Ohm's Law
B. Faraday's Law
C. Kirchhoff's Voltage Law
D. Kirchhoff's Current Law
Answer: D
Rationale: Kirchhoff's Current Law (KCL) is based on
conservation of electric charge.
Question 3
Which material has the highest electrical conductivity?
A. Aluminum
B. Copper
C. Gold
D. Silver
, Answer: D
Rationale: Silver has the highest electrical conductivity of all
metals, although copper is more commonly used because of
cost.
Question 4
A conductor carries 15 A for 4 minutes. How much charge
passes through it?
A. 600 C
B. 1200 C
C. 3600 C
D. 7200 C
Answer: C
Rationale: Q = I × t = 15 × (4 × 60) = 3600 coulombs.
Question 5
Which component stores energy primarily in an electric field?
A. Inductor
B. Transformer
Examination (2026 Edition) | Advanced
Certification Practice Examination | High-
Difficulty Multiple-Choice Questions with
Verified Answers & Detailed Rationales
Advanced Professional Practice Examination
Subject: Electrical Theory
Difficulty: Pro-Class / Expert Level
Coverage: DC Circuits, AC Theory, Electromagnetism, Three-
Phase Systems, Transformers, Electrical Machines, Power
Factor, Harmonics, Protection, Measurements, Electrical Safety,
Modern Electrical Principles.
Question 1
A 24 V DC source supplies a circuit with a resistance of 6 Ω.
What is the circuit current?
A. 2 A
B. 3 A
C. 4 A
D. 6 A
Answer: C
,Rationale: Using Ohm's Law, I = V/R = 24/6 = 4 A.
Question 2
Which law states that the algebraic sum of currents entering a
junction equals the sum leaving it?
A. Ohm's Law
B. Faraday's Law
C. Kirchhoff's Voltage Law
D. Kirchhoff's Current Law
Answer: D
Rationale: Kirchhoff's Current Law (KCL) is based on
conservation of electric charge.
Question 3
Which material has the highest electrical conductivity?
A. Aluminum
B. Copper
C. Gold
D. Silver
, Answer: D
Rationale: Silver has the highest electrical conductivity of all
metals, although copper is more commonly used because of
cost.
Question 4
A conductor carries 15 A for 4 minutes. How much charge
passes through it?
A. 600 C
B. 1200 C
C. 3600 C
D. 7200 C
Answer: C
Rationale: Q = I × t = 15 × (4 × 60) = 3600 coulombs.
Question 5
Which component stores energy primarily in an electric field?
A. Inductor
B. Transformer
