Electrical Engineering Mock Exam (2026) With Answer Key and Detailed Rationales (Comprehensive Practice Test: Circuits, Machines, Power Systems, Electronics, Control & Communication)

Electrical Engineering Mock Exam (2026)
With Answer Key and Detailed Rationales
(Comprehensive Practice Test: Circuits,
Machines, Power Systems, Electronics,
Control & Communication)


Section A: Basic Electrical Concepts (1–20)




### 1. Electric current is the flow of:

A. Voltage
B. Electrons (charge)
C. Power
D. Resistance

Answer: B. Electrons (charge)
Rationale: Current represents the movement of electric
charge through a conductor.

,### 2. The SI unit of voltage is:

A. Ampere
B. Ohm
C. Volt
D. Watt

Answer: C. Volt
Rationale: Voltage measures electric potential difference.




### 3. Ohm’s Law is expressed as:

A. P = VI
B. V = IR
C. I = P/V
D. R = V²/I

Answer: B. V = IR
Rationale: Voltage equals current times resistance.




### 4. Electrical power is measured in:

,A. Joules
B. Watts
C. Ohms
D. Amperes

Answer: B. Watts
Rationale: Power is the rate of energy transfer.




### 5. A conductor has:

A. High resistance
B. Low resistance
C. No electrons
D. Infinite impedance

Answer: B. Low resistance
Rationale: Conductors allow free flow of electrons.




### 6. Insulators are materials that:

A. Conduct electricity
B. Resist current flow

, C. Increase voltage
D. Store energy

Answer: B. Resist current flow
Rationale: Insulators block electron movement.




### 7. The unit of resistance is:

A. Volt
B. Ampere
C. Ohm
D. Watt

Answer: C. Ohm
Rationale: Resistance is measured in ohms (Ω).




### 8. Electrical energy is measured in:

A. Watts
B. Joules or kWh
C. Volts
D. Amperes