# 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?

1. All electric circuits are electric networks
2. All electric networks are electric circuits
3. All electric circuits are electric networks and vice versa
4. 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?

1. C
2. V
3. I
4. Q

Explanation:

Current is usually denoted by I.

3. What is the unit of current?

1. Ampere
2. Coloumb
3. Electrons
4. Joule

Explanation:

The unit of current is Ampere.

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

1. Conventional current
2. Electron 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 ____.

1. Joule
2. Ampere
3. Volt
4. Coloumb

Explanation:

Voltage is measured in the form of a volt.

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

1. The product of voltage V and current I is power
2. The product of potential energy W and current I is power
3. The product of voltage V and charge Q is power
4. 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?

1. Active elements do not supply electricity to other elements in an electric circuit
2. 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.

1. Active elements
2. Passive 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?

1. Current source
2. Voltage source
3. 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?

1. Inductors
2. Capacitor
3. Resistor
4. 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.

1. Bilateral elements
2. Unilateral 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.

1. Independent voltage
2. Independent Current

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?

1. Curve
2. Straight line
3. 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 ____.

1. Voltages sources
2. Controlled sources
3. Feedback 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?

1. 5
2. 4
3. 3
4. 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?

1. 5
2. 4
3. 3
4. 2

Explanation:

Dependent sources are classified into two groups:

• Dependent Voltage Sources
• Dependent Current Sources

17. Which of the following statement is TRUE?

1. The signs '+' and '-' inside a diamond shape signify dependent voltage sources
2. The arrow inside a diamond shape signifies dependent voltage sources
3. The double dash inside a diamond shape signifies dependent voltage sources
4. 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?

1. 4
2. 2
3. 5
4. 7

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?

1. The signs '+' and '-' inside a diamond shape signify dependent current sources
2. The arrow inside a diamond shape signifies dependent current sources
3. The double dash inside a diamond shape signifies dependent current sources
4. 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.

1. Inductor
2. Capacitor
3. 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.

1. Inductor
2. Capacitor
3. Resistor

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.

1. Inductor
2. Capacitor
3. Resistor

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)?

1. According to Kirchhoff's Current Law (KCL), zero is the algebraic multiplication of currents leaving (or entering) a node
2. According to Kirchhoff's Current Law (KCL), one is the algebraic sum of currents leaving (or entering) a node
3. According to Kirchhoff's Current Law (KCL), zero is the algebraic integration of currents leaving (or entering) a node
4. 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?

1. The term "principal node" refers to a node that has three or more circuit elements connected to it
2. The term "principal node" refers to a node that has only two circuit elements connected to it
3. 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.

1. Register node
2. Direct node
3. Implied node
4. 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 ____.

1. Loop
2. Mesh

Explanation:

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

27. What is Mesh?

1. A closed-circuit path that has more than one internal path is called a mesh
2. A closed-circuit path that has at least 1 internal path is called a mesh
3. 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 ____.

1. Infinite
2. One
3. Negative one
4. 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?

1. When the number of principal nodes is more than the number of electrical-circuit meshes
2. 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?

1. when the number of meshes is less than the total number of principal electrical circuit nodes
2. 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?

1. Mesh analysis
2. Nodal analysis
3. Both
4. None

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.

1. Connected
2. Unconnected
3. Directed
4. Undirected

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.

1. Connected
2. Unconnected
3. Directed
4. Undirected

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 ____.

1. Feedback graph
2. Isolated graph
3. Arrow graph
4. Oriented graph

Explanation:

Directed graphs are also known as oriented graphs.

35. What is a directed graph?

1. A directed graph is one in which all of the branches of a graph are represented by arrows
2. A directed graph is one in which all of the branches of a graph are represented by a dash
3. 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?

1. An undirected graph is one in which the branches of a graph are represented by arrows
2. 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?

1. 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
2. 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 ____.

1. To generate maximum external power through a DC network, the load's resistance must equal the source's resistance for a given load
2. 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.

1. Vibrations
2. Resonance
3. Resilience
4. Synchronization

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?

1. 5
2. 7
3. 2
4. 9

Explanation:

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

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

1. Electrical
2. Magnetic

Explanation:

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

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

1. Metallic
2. Electrical
3. 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?

1. 5
2. 4
3. 7
4. 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?

1. Z parameters
2. Y parameters
3. T parameters
4. T' 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?

1. Ohm
2. Joule
3. Volt
4. Mho

Explanation:

Unit of Z parameter in Ohm.

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

1. g parameters
2. Y parameters
3. T parameters
4. T' 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?

1. Ohm
2. Joule
3. Volt
4. Mho

Explanation:

Unit of Y parameter in Mho.

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

1. Transmission parameter
2. ABCD parameter
3. Total parameter
4. A and B both
5. 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 ____.

1. Hybrid parameter
2. Hyperparameter
3. High-definition parameter

Explanation:

h parameters are called Hybrid parameters.

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

1. g parameters
2. Y parameters
3. T parameters
4. T' parameters

Explanation:

g-parameters are called inverse hybrid parameters.

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

1. Voltage
2. Current
3. Charge
4. Time

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?

1. 5
2. 6
3. 3
4. 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?

1. Low Pass Filter
2. High Pass Filter
3. Band Pass Filter
4. Band Stop 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?

1. Low Pass Filter
2. High Pass Filter
3. Band Pass Filter
4. Band Stop 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?

1. Low Pass Filter
2. High Pass Filter
3. Band Pass Filter
4. 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.

1. Rejects
2. Pass
3. Divert

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."

1. Superposition principle
2. Norton's theorem
3. 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?

1. 5
2. 4
3. 3
4. 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.

1. Non-linear relationship
2. 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.

1. Non-linear relationship
2. 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.

1. Independent
2. Dependent

Explanation:

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