Network Theory Laboratory Viva Questions 4

1. A circuit is said to be linear when the current – voltage relation-ship can be expressed by linear

(A) Algebraic equation

(B) Differential equations

(C) Integral equations

(D) Integro-differential equations

(E) All of the above

(F) None

Answer : [E] All of the above

2. Which of the following is not a characteristic of an independent voltage source?

(A) Voltage independent on magnitude of current drawn

(B) Voltage dependent on magnitude of current drawn

(C) Independent of direction of current flow

(D) Can supply (or) receive uninterrupted energy at constant voltage

(E) Both (B) & (D)

(F) All of the above

Answer : [B] Voltage dependent on magnitude of current drawn

3. In the mesh analysis technique, the independent variables are

(A) Mesh currents

(B) Branch currents

(C) Mesh voltages

(D) Node voltages

(E) Both (A) & (C)

(F) none of the above

Answer : [A]

4. How is the response of a circuit related to the time constant of a circuit?

(A) Smaller the time constant, slower is the response

(B) Magnitude of the time constant has no effect on response

(C) Smaller the time constant faster is the response

(D) Larger the time constant, faster is the response

(E) Both (A) & (D)

(F) None of the above

Answer : [C]

5. In an LC circuit, the damping ratio (ζ) is equal to

(A) Unity

(B) Zero

(C) Infinite

(D) C/L

(D) L/C

(F) LC

Answer : [B]

6. What is (are) the condition(s) for adding a two or more sinusoidal functions?

(A) The same angular velocity with a different phase angle

(B) A different angular velocity with a different phase angle

(C) The same angular velocity with always same phase angle

(D) The different angular velocity with a same phase angle

(E) All of the above

(F) None of the above

Answer : [A]

7. Which one of the following is not true for power Q delivered to a pure capacitor C when it is connected across a sinusoidal voltage source of V, frequency f Hz, and a current I flowing through it?

(A) Q = VI

(C) Q = 2πfCV 2

(B)Q = −VI

(D)Q=I2/2πfC

Answer : [A]

8. A graph is made up of „n‟ nodes, including the reference node. Which of the following will not meet the condition to form a tree of the graph?

(A) Must connect all „n‟ nodes

(B) Must connect all „(n-1)‟ nodes except the reference node

(C) Must be oriented

(D) Must not have a closed path

Answer : [B]

9. In an element to node incidence matrix, which of the following represents that an element is oriented towards the node?

(A) 0

(B) 1

(C) -1

(D) None of the above

Answer : [C]

10. How many branches can be connected to a node?

(A) 1

(B) 2

(C) 3

(E) 5

(F) 6

Answer : [G]