Kirchhoff’s Voltage Law MCQ Questions with answers

Electrical Engineering MCQ Questions on Kirchhoff’s Voltage Law.

Statement of KVL: The sum of voltage rise around a closed loop is equal to sum of voltage drop.

Kirchhoff’s Voltage Law MCQ#1

The algebraic sum of voltages around any closed loop circuit is equal to:

1. One
2. Zero
3. Infinity
4. None of these

Correct answer: Zero

Sum of voltage drops + Sum of voltage rise = 0

Kirchhoff’s Voltage Law MCQ#2

In above circuit voltage V is:

1. 3 V
2. 4 V
3. 5 V
4. 8 V

Correct answer: 2. 4 V

Σ Voltage_rise = Σ Voltage_drop

12 V = 5 V + 3 V + V

V = 12 – 5 – 3 = 4 V

Kirchhoff’s Voltage Law MCQ#3

Kirchhoff’s voltage law is applicable to:

1. Loop
2. Nodes

Correct answer: 1. Loop

Kirchhoff’s Voltage Law MCQ#4

The loop equation for central loop of circuit is:

1. V₃ + V₄ + V₅ = 0
2. V₃ + V₄ = V₅
3. V₃ = V₄ + V₅
4. V₃ = V₄ – V₅

Correct answer: 2. V₃ + V₄ = V₅

Kirchhoff’s Voltage Law MCQ#5

The value of unknown voltage source V1 in circuit given below is:

Resistor colors: Red Yellow Brown Gray

1. 4 V
2. 8 V
3. 12 V
4. Can’t predict

Correct answer: 2. 8 V

Solution:

Resistor color coding: Red Yellow Brown Gray = 240 Ω ±10%

For resistor V = IR = 50 mA * 240 ohms = 12 V

Applying Kirchhoff’s voltage law:

Σ Voltage_rise = Σ Voltage_drop

V₁ + 12 V = 12 V + 3 V + 5 V

V₁ = 20 V – 12 V = 8 V