# Network Theory Multiple-Choice Questions (MCQs)

**Network theory** is a part of graph theory in mathematics, computer science, and network science. Network theory provides a set of techniques for analyzing networks (defined as graphs where the nodes or edges possess attributes).

**Network Theory MCQs**: This section contains multiple-choice questions and answers on the various topics of Network Theory. Practice these MCQs to test and enhance your skills on Network Theory.

## List of Network Theory MCQs

**1. Which of the following statement is TRUE?**

- All electric circuits are electric networks
- All electric networks are electric circuits
- All electric circuits are electric networks and vice versa
- All electric circuits are electric networks but the opposite of this is not True

**Answer:** D) All electric circuits are electric networks but the opposite of this is not True.

**Explanation:**

"All electric circuits are electric networks", but the opposite is not always true.

**2. Current is usually denoted by using which of the following symbol?**

- C
- V
- I
- Q

**Answer:** C) I

**Explanation:**

Current is usually denoted by I.

**3. What is the unit of current?**

- Ampere
- Coloumb
- Electrons
- Joule

**Answer:** A) Ampere

**Explanation:**

The unit of current is Ampere.

**4. ____ current flows from the source's positive terminal to the source's negative terminal.**

- Conventional current
- Electron current

**Answer:** A) Conventional current

**Explanation:**

Conventional current flows from the source's positive terminal to the source's negative terminal.

**5. Voltage is measured in the form of ____.**

- Joule
- Ampere
- Volt
- Coloumb

**Answer:** C) Volt

**Explanation:**

Voltage is measured in the form of a volt.

**6. Which of the following statement is True about power?**

- The product of voltage V and current I is power
- The product of potential energy W and current I is power
- The product of voltage V and charge Q is power
- The product of charge Q and current I is power

**Answer:** A) The product of voltage V and current I is power.

**Explanation:**

The product of voltage V and current I is power.

**7. What are active network elements?**

- Active elements do not supply electricity to other elements in an electric circuit
- Active elements supply electricity to other elements in an electric circuit

**Answer:** B) Active elements supply electricity to other elements in an electric circuit.

**Explanation:**

Active network elements supply electricity to other elements in an electric circuit.

**8. Power can be delivered as well as absorbed by ____ elements.**

- Active elements
- Passive elements

**Answer:** A) Active elements

**Explanation:**

Power can be delivered as well as absorbed by active elements.

**9. Among the examples given below, which one falls under the category of passive elements?**

- Current source
- Voltage source
- Inductors

**Answer:** C) Inductors

**Explanation:**

Inductors, capacitors, and resistors are examples of passive elements, whereas voltage sources and current sources are examples of active elements.

**10. Which of the following, is not an example of linear elements?**

- Inductors
- Capacitor
- Resistor
- Current sources

**Answer:** D) Current sources

**Explanation:**

Current sources and voltage sources are examples of non-linear elements whereas Inductors, capacitors, and resistors are examples of linear elements.

**11. ____ Elements are those that enable current to flow in both directions and have the same impedance in either direction.**

- Bilateral elements
- Unilateral elements

**Answer:** A) Bilateral elements

**Explanation:**

Bilateral Elements are those that enable current to flow in both directions and have the same impedance in either direction.

**12. An ____ source generates a constant voltage across its two terminals.**

- Independent voltage
- Independent Current

**Answer:** A) Independent voltage

**Explanation:**

An independent voltage source generates a constant voltage across its two terminals.

**13. What describes the V-I characteristics of an ideal voltage source?**

- Curve
- Straight line
- Constant line

**Answer:** C) Constant line

**Explanation:**

Constant line describes the V-I characteristics of an ideal voltage source.

**14. Dependent sources in network theory are also known as ____.**

- Voltages sources
- Controlled sources
- Feedback sources

**Answer:** B) Controlled sources

**Explanation:**

Dependent sources in network theory is also known as Controlled sources.

**15. Independent sources in network theory are divided into how many categories?**

- 5
- 4
- 3
- 2

**Answer:** D) 2

**Explanation:**

Independent sources are classified into two groups:

- Independent Voltage Sources
- Independent Current Sources

**16. Dependent sources in network theory are divided into how many categories?**

- 5
- 4
- 3
- 2

**Answer:** D) 2

**Explanation:**

Dependent sources are classified into two groups:

- Dependent Voltage Sources
- Dependent Current Sources

**17. Which of the following statement is TRUE?**

- The signs '+' and '-' inside a diamond shape signify dependent voltage sources
- The arrow inside a diamond shape signifies dependent voltage sources
- The double dash inside a diamond shape signifies dependent voltage sources
- The Underscore and "+" inside a diamond shape signify dependent voltage sources

**Answer:** A) The signs '+' and '-' inside a diamond shape signify dependent voltage sources.

**Explanation:**

The signs '+' and '-' inside a diamond shape signify dependent voltage sources.

**18. Dependent voltage sources in network theory are of how many types?**

- 4
- 2
- 5
- 7

**Answer:** D) 2

**Explanation:**

Dependent voltage sources are divided into two categories:

- Voltage-Dependent Voltage Source (VDVS)
- Current Dependent Voltage Source (CDVS)

**19. Which of the following statement is TRUE?**

- The signs '+' and '-' inside a diamond shape signify dependent current sources
- The arrow inside a diamond shape signifies dependent current sources
- The double dash inside a diamond shape signifies dependent current sources
- The Underscore and "+" inside a diamond shape signify dependent current sources

**Answer:** B) The arrow inside a diamond shape signifies dependent current sources.

**Explanation:**

The arrow inside a diamond shape signifies dependent current sources.

**20. The ____ serves as a limiting or regulating element in an electronic circuit.**

- Inductor
- Capacitor
- Resistor

**Answer:** C) Resistor

**Explanation:**

The resistor serves as a limiting or regulating element in an electronic circuit.

**21. In most electrical circuits, ____ are used to store energy, primarily magnetic energy, when a current flows through them.**

- Inductor
- Capacitor
- Resistor

**Answer:** A) Inductor

**Explanation:**

In most electrical circuits, inductors are used to store energy, primarily magnetic energy, when a current flows through them.

**22. In electrical engineering, a ____ refers to a passive component that stores energy in the form of an electrostatic field.**

- Inductor
- Capacitor
- Resistor

**Answer:** B) Capacitor

**Explanation:**

In electrical engineering, a capacitor refers to a passive component that stores energy in the form of an electrostatic field.

**23. What is Kirchhoff's Current Law (KCL)?**

- According to Kirchhoff's Current Law (KCL), zero is the algebraic multiplication of currents leaving (or entering) a node
- According to Kirchhoff's Current Law (KCL), one is the algebraic sum of currents leaving (or entering) a node
- According to Kirchhoff's Current Law (KCL), zero is the algebraic integration of currents leaving (or entering) a node
- According to Kirchhoff's Current Law (KCL), zero is the algebraic sum of currents leaving (or entering) a node

**Answer:** D) According to Kirchhoff's Current Law (KCL), zero is the algebraic sum of currents leaving (or entering) a node.

**Explanation:**

According to Kirchhoff's Current Law (KCL), zero is the algebraic sum of currents leaving (or entering) a node.

**24. What is the principal node?**

- The term "principal node" refers to a node that has three or more circuit elements connected to it
- The term "principal node" refers to a node that has only two circuit elements connected to it
- The term "principal node" refers to a node that has no circuit elements connected to it

**Answer:** A) The term "principal node" refers to a node that has three or more circuit elements connected to it.

**Explanation:**

The term "principal node" refers to a node that has three or more circuit elements connected to it.

**25. A node is referred to as a ____ node if there are only two circuit elements connected to it.**

- Register node
- Direct node
- Implied node
- Simple node

**Answer:** D) Simple node

**Explanation:**

A node is referred to as a simple node if there are only two circuit elements connected to it.

**26. Any closed path that circles a circuit's nodes more than once is referred to as a ____.**

- Loop
- Mesh

**Answer:** A) Loop

**Explanation:**

Any closed path that circles a circuit's nodes more than once is referred to as a loop.

**27. What is Mesh?**

- A closed-circuit path that has more than one internal path is called a mesh
- A closed-circuit path that has at least 1 internal path is called a mesh
- A closed-circuit path that has no internal paths is called a mesh

**Answer:** C) A closed-circuit path that has no internal paths is called a mesh.

**Explanation:**

A closed circuit path that has no internal paths is called a mesh.

**28. According to Kirchhoff's Voltage Law (KVL), the algebraic sum of the voltages in a loop or mesh equals ____.**

- Infinite
- One
- Negative one
- Zero

**Answer:** D) Zero

**Explanation:**

According to Kirchhoff's Voltage Law (KVL), the algebraic sum of the voltages in a loop or mesh equals zero.

**29. Which of the following is the correct situation to choose a nodal analysis method for solving any electrical network?**

- When the number of principal nodes is more than the number of electrical-circuit meshes
- When the number of principal nodes is less than the number of electrical-circuit meshes

**Answer:** B) When the number of principal nodes is less than the number of electrical-circuit meshes.

**Explanation:**

When the number of principal nodes is less than the number of electrical-circuit meshes.

**30. Which of the following is the correct situation to choose the mesh analysis method for solving any electrical network?**

- when the number of meshes is less than the total number of principal electrical circuit nodes
- when the number of meshes is more than the total number of principal electrical circuit nodes

**Answer:** A) when the number of meshes is less than the total number of principal electrical circuit nodes.

**Explanation:**

when the number of meshes is less than the total number of principal electrical circuit nodes.

**31. Which of the following method you will choose When the number of meshes equals the number of principal nodes in any electric circuit?**

- Mesh analysis
- Nodal analysis
- Both
- None

**Answer:** C) Both

**Explanation:**

When the number of meshes equals the number of principal nodes in any electric circuit, we can use either Nodal analysis or Mesh analysis.

**32. A ____ graph exists when there is at least one branch connecting any two nodes in a graph.**

- Connected
- Unconnected
- Directed
- Undirected

**Answer:** A) Connected

**Explanation:**

A connected graph exists when there is at least one branch connecting any two nodes in a graph.

**33. An ____ graph exists when there is at least one node in the graph that is not connected by even a single branch.**

- Connected
- Unconnected
- Directed
- Undirected

**Answer:** B) Unconnected

**Explanation:**

An unconnected graph exists when there is at least one node in the graph that is not connected by even a single branch.

**34. Directed graphs are also known as ____.**

- Feedback graph
- Isolated graph
- Arrow graph
- Oriented graph

**Answer:** D) Oriented graph

**Explanation:**

Directed graphs are also known as oriented graphs.

**35. What is a directed graph?**

- A directed graph is one in which all of the branches of a graph are represented by arrows
- A directed graph is one in which all of the branches of a graph are represented by a dash
- A directed graph is one in which all of the branches of a graph are represented by lines

**Answer:** A) A directed graph is one in which all of the branches of a graph are represented by arrows.

**Explanation:**

A directed graph is one in which all of the branches of a graph are represented by arrows.

**36. What is an undirected graph?**

- An undirected graph is one in which the branches of a graph are represented by arrows
- An undirected graph is one in which the branches of a graph are not represented by arrows

**Answer:** B) An undirected graph is one in which the branches of a graph are not represented by arrows.

**Explanation:**

An undirected graph is one in which the branches of a graph are not represented by arrows.

**37. What is Norton's theorem?**

- According to Norton's theorem, any complicated linear circuit may be simplified to an equivalent simple circuit with a single current source coupled in series with a single resistor connected to a load
- According to Norton's theorem, any complicated linear circuit may be simplified to an equivalent simple circuit with a single current source coupled in parallel with a single resistor connected to a load

**Answer:** B) According to Norton's theorem, any complicated linear circuit may be simplified to an equivalent simple circuit with a single current source coupled in parallel with a single resistor connected to a load.

**Explanation:**

According to Norton's theorem, any complicated linear circuit may be simplified to an equivalent simple circuit with a single current source coupled in parallel with a single resistor connected to a load.

**38. Maximum power transfer theorem states that ____.**

- To generate maximum external power through a DC network, the load's resistance must equal the source's resistance for a given load
- To generate maximum external power through an AC network, the load's resistance must equal the source's resistance for a given load

**Answer:** A) To generate maximum external power through a DC network, the load's resistance must equal the source's resistance for a given load.

**Explanation:**

To generate maximum external power through a DC network, the load's resistance must equal the source's resistance for a given load.

**39. Electric circuits experience ____ due to the existence of energy-storing devices such as inductors and capacitors.**

- Vibrations
- Resonance
- Resilience
- Synchronization

**Answer:** B) Resonance

**Explanation:**

Electric circuits experience resonance due to the existence of energy-storing devices such as inductors and capacitors.

**40. How many types of resonance are there?**

- 5
- 7
- 2
- 9

**Answer:** C) 2

**Explanation:**

There are two types of resonance: Parallel resonance and series resonance.

**41. ____ coupling happens when two coils (or inductors) are physically connected.**

- Electrical
- Magnetic

**Answer:** A) Electrical

**Explanation:**

Electrical coupling happens when two coils (or inductors) are physically connected.

**42. ____ coupling happens when two coils (or inductors) have no physical connection.**

- Metallic
- Electrical
- Magnetic

**Answer:** C) Magnetic

**Explanation:**

Magnetic coupling happens when two coils (or inductors) have no physical connection.

**43. How many types of two-port network parameters are there?**

- 5
- 4
- 7
- 6

**Answer:** D) 6

**Explanation:**

There are 6 types of two-port network parameters.

- Z parameters
- Y parameters
- T parameters
- T' parameters
- h-parameters
- g-parameters

**44. Which of the following two-port network parameter is also known as the impedance parameter?**

- Z parameters
- Y parameters
- T parameters
- T' parameters

**Answer:** A) Z parameters

**Explanation:**

The Z parameter in the two-port network is also known as the impedance parameter.

**45. What is the unit of the Z parameter?**

- Ohm
- Joule
- Volt
- Mho

**Answer:** A) Ohm

**Explanation:**

Unit of Z parameter in Ohm.

**46. Which of the following two-port network parameter is also known as an admittance parameter?**

- g parameters
- Y parameters
- T parameters
- T' parameters

**Answer:** B) Y parameters

**Explanation:**

The Y parameter in the two-port network is also known as the admittance parameter.

**47. What is the unit of the Y parameter?**

- Ohm
- Joule
- Volt
- Mho

**Answer:** D) Mho

**Explanation:**

Unit of Y parameter in Mho.

**48. What is the other name for the T parameter?**

- Transmission parameter
- ABCD parameter
- Total parameter
- A and B both
- A and C both

**Answer:** D) A and B both

**Explanation:**

T parameters are called transmission parameters or ABCD parameters.

**49. h parameters are called as ____.**

- Hybrid parameter
- Hyperparameter
- High-definition parameter
- Hexadecimal parameter

**Answer:** A) Hybrid parameter

**Explanation:**

h parameters are called Hybrid parameters.

**50. Which of the following parameter are called inverse hybrid parameters?**

- g parameters
- Y parameters
- T parameters
- T' parameters

**Answer:** A) g parameters

**Explanation:**

g-parameters are called inverse hybrid parameters.

**51. The total magnetic flux produced by an inductor is proportional to its ____.**

- Voltage
- Current
- Charge
- Time

**Answer:** B) Current

**Explanation:**

The total magnetic flux produced by an inductor is proportional to its current, I.

**52. Filters are split into how many categories based on their frequency band?**

- 5
- 6
- 3
- 4

**Answer:** D) 4

**Explanation:**

Filters are split into four categories based on their frequency band:

- Low Pass Filter
- High Pass Filter
- Band Pass Filter
- Band Stop Filter

**53. All high-frequency components are rejected by which of the following filter?**

- Low Pass Filter
- High Pass Filter
- Band Pass Filter
- Band Stop Filter

**Answer:** A) Low Pass Filter

**Explanation:**

All additional high-frequency components are rejected (blocked) by a low-pass filter. It only allows low-frequency components.

**54. All low-frequency components are rejected by which of the following filter?**

- Low Pass Filter
- High Pass Filter
- Band Pass Filter
- Band Stop Filter

**Answer:** B) High Pass Filter

**Explanation:**

All low-frequency components are rejected (blocked) by a high pass filter. It only allows high-frequency components.

**55. Which filter permits (allows) both low and high-frequency components to pass through?**

- Low Pass Filter
- High Pass Filter
- Band Pass Filter
- Band Stop Filter

**Answer:** D) Band Stop Filter

**Explanation:**

Band stop filter permits (allows) both low and high-frequency components to pass through.

**56. Bandpass filter ____ both low and high-frequency components to pass through.**

- Rejects
- Pass
- Divert

**Answer:** A) Rejects

**Explanation:**

Bandpass filter rejects both low and high-frequency components to pass through.

**57. Which of the following theorem states that-**

*"Any linear electrical network with voltage and current sources and resistances can be substituted by an equivalent circuit consisting of a single voltage source connected in series with a single resistor."*

- Superposition principle
- Norton's theorem
- Thevenin's theorem

**Answer:** C) Thevenin's theorem

**Explanation:**

Thevenin's theorem states that- *"Any linear electrical network with voltage and current sources and resistances can be substituted by an equivalent circuit consisting of a single voltage source connected in series with a single resistor."*

**58. Kirchhoff has given how many fundamental laws?**

- 5
- 4
- 3
- 2

**Answer:** D) 2

**Explanation:**

Kirchhoff's Laws are two fundamental laws in network theory. The first law is Kirchhoff's Current Law (KCL), and the second law, is Kirchhoff's Voltage Law (KVL).

**59. Voltage across an inductor and current flowing through it have a ____ relationship.**

- Non-linear relationship
- Linear relationship

**Answer:** B) Linear relationship

**Explanation:**

Voltage across an inductor and current flowing through it have a linear relationship.

**60. Voltage across the capacitor and current flowing through it have a ____ relationship.**

- Non-linear relationship
- Linear relationship

**Answer:** B) Linear relationship

**Explanation:**

Voltage across the capacitor and current flowing through it have a linear relationship.

**61. KCL is unaffected (____) by the kind of network elements linked to a node.**

- Independent
- Dependent

**Answer:** A) Independent

**Explanation:**

KCL is unaffected (independent) by the kind of network elements linked to a node.

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