EEE 120: Fundamentals of Electrical Engineering — Final Exam Questions and Answers |Fall 2026/2027 Update | 100% Correct Latest

EEE 120: Fundamentals of Electrical Engineering — Final Exam
Questions and Answers |Fall 2026/2027 Update | 100% Correct Latest


QUESTION 1

In a direct current (DC) circuit, the current through a resistor is proportional to which of the
following quantities?
A. The square of the voltage
B. The reciprocal of the resistance
C. The voltage applied
D. The power dissipated

CORRECT ANSWER: C
𝑉
RATIONALE: According to Ohm’s Law, 𝐼 = 𝑅, meaning current is directly proportional to the
voltage (V) for a given resistance.



QUESTION 2

Which of the following quantities has the unit “farad”?
A. Resistance
B. Capacitance
C. Inductance
D. Conductance

CORRECT ANSWER: B
RATIONALE: The farad (F) is the SI unit of capacitance, measuring a capacitor’s ability to store
electrical charge.



QUESTION 3

What is the time constant 𝜏of an RC circuit?
A. 𝑅 + 𝐶
B. 𝑅 × 𝐶
𝑅
C. 𝐶
𝐶
D. 𝑅

,CORRECT ANSWER: B
RATIONALE: The time constant in an RC circuit is given by 𝜏 = 𝑅 × 𝐶, representing the time
needed for the capacitor to charge to 63.2% of its final voltage.



QUESTION 4

In an ideal transformer, what is the relationship between the primary and secondary voltages?
𝑉𝑝 𝑁
A. = 𝑁𝑠
𝑉𝑠 𝑝
𝑉𝑝 𝑁𝑝
B. =
𝑉𝑠 𝑁𝑠

C. 𝑉𝑝 = 𝑉𝑠
D. 𝑉𝑝 + 𝑉𝑠 = 0

CORRECT ANSWER: B
𝑉𝑝 𝑁𝑝
RATIONALE: The voltage ratio in a transformer is directly proportional to the turns ratio: = .
𝑉𝑠 𝑁𝑠




QUESTION 5

For an inductor, the voltage across it is proportional to:
A. The current through it
B. The rate of change of current through it
C. The square of the current
D. The capacitance of the circuit

CORRECT ANSWER: B
𝑑𝑖
RATIONALE: Inductor voltage follows 𝑉 = 𝐿 𝑑𝑡, meaning it’s proportional to the rate of change of
current.



QUESTION 6

The power factor of a purely resistive circuit is:
A. 0
B. 0.5
C. 1
D. Undefined

,CORRECT ANSWER: C
RATIONALE: Because voltage and current are in phase in a resistive circuit, the power factor is 1
(i.e., purely real power).



QUESTION 7

If two resistors, 4 Ω and 6 Ω, are connected in parallel, the equivalent resistance is:
A. 2.4 Ω
B. 5 Ω
C. 10 Ω
D. 1.6 Ω

CORRECT ANSWER: A
𝑅1 𝑅2 4×6
RATIONALE: Using 𝑅𝑒𝑞 = = 4+6 = 2.4 Ω.
𝑅1 +𝑅2




QUESTION 8

Kirchhoff’s Voltage Law (KVL) states that:
A. The sum of currents entering a node equals the sum leaving
B. The sum of voltages around any closed loop equals zero
C. Voltage is directly proportional to current
D. The sum of power in a system is zero

CORRECT ANSWER: B
RATIONALE: KVL ensures conservation of energy in electrical loops.



QUESTION 9

In AC analysis, the term “reactance” refers to:
A. Opposition to current due to resistance only
B. Opposition to current due to capacitance or inductance
C. The ratio of current to voltage
D. The product of resistance and frequency

CORRECT ANSWER: B
RATIONALE: Reactance (X) arises from capacitors and inductors, representing frequency-
dependent opposition to AC flow.

, QUESTION 10

In a sinusoidal waveform, the RMS value is equal to the peak value divided by:
A. 2
B. √ 2
C. 𝜋
D. 2√ 2

CORRECT ANSWER: B
𝑉𝑝𝑒𝑎𝑘
RATIONALE: RMS = , representing the effective value of AC voltage.
√2

QUESTION 11

Which of the following components stores energy in an electric field?
A. Inductor
B. Resistor
C. Capacitor
D. Transformer

CORRECT ANSWER: C
RATIONALE: A capacitor stores electrical energy in the form of an electric field between its
plates.



QUESTION 12

What is the unit of inductance?
A. Farad
B. Henry
C. Ohm
D. Tesla

CORRECT ANSWER: B
RATIONALE: The Henry (H) is the SI unit of inductance, representing the ability of an inductor to
store energy in a magnetic field.



QUESTION 13