Electric Circuits Questions and Answers – Kirchhoff’s Laws

This set of Electric Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Kirchhoff’s Laws”.

1. KCL is based on the fact that
a) There is a possibility for a node to store energy.
b) There cannot be an accumulation of charge at a node.
c) Charge accumulation is possible at node
d) Charge accumulation may or may not be possible.
View Answer

2. Relation between currents according to KCL is

a) i₁=i₂=i₃=i₄=i₅
b) i₁+i₄+i₃=i₅+i₂
c) i₁-i₅=i₂-i₃-i₄
d) i₁+i₅=i₂+i₃+i₄
View Answer

3. The algebraic sum of voltages around any closed path in a network is equal to ____________
a) Infinity
b) 1
c) 0
d) Negative polarity
View Answer

4. Calculate potential difference between x and y

a) 4.275v
b) -4.275v
c) 4.527v
d) -4.527v
View Answer

Answer: b
Explanation:

I₁ = 3/3+5 = 3/8 = 0.375Ω
I₂ = 4/5 = 0.8Ω
V_xy = v_x – v_y
V_x + 5I₁ + 4 – 2I₂ – v_y = 0
V_x – v_y = 2I2 – 4 – 5I₁ = -4.275Ω

5. Find R-value from the below circuit?

a) 17.5 Ω
b) 17.2 Ω
c) 17.4 Ω
d) 17.8 Ω
View Answer

Answer: a
Explanation:

KVL: 70 – 5I – 7(I – 2) = 0
I = 7A
KVL to 2nd loop: 7(I – 2) – 2R = 0
R=17.5Ω

6. Determine currents I₁ , I₂ and I₃.

a) -3.3A, -8.5A, 2.4A
b) 3A, -8A, 2A
c) 3.3A, 8.5A, -2.4A
d) 3.2A, 8.6A, 2.3A
View Answer

Answer: c
Explanation:

I₁ = I₁ – I₂ + 8 + I₃ + 3
I₂ – I₃ = 11 -> 1
And -11 I1 – 7(I₁ – I₂) = 0
-18 I₁ + 7 I₂ = 0 -> 2
And -11 I₁ – 15 I₃ =0 -> 3
Solving I₁ = 3.32A I₂ = 8.5A I₃ = -2.4A.

7. All _____________ are loops but _______________ are not meshes
a) Loops, Meshes
b) Meshes, loops
c) Branches, loops
d) Nodes, Branches
View Answer

8. Solve and find the value of I.

a) -0.5A
b) 0.5A
c) -0.2A
d) 0.2A
View Answer

9. The basic laws for analyzing an electric circuit are :-
a) Einstein’s theory
b) Newtons laws
c) Kirchhoff’s laws
d) Faradays laws
View Answer

10. A junction whell two (or) more than two network elements meet is known as a ______________
a) Node
b) Branch
c) Loop
d) Mesh
View Answer

Sanfoundry Global Education & Learning Series – Electric Circuits.

To practice all areas of Electric Circuits, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]