Network Functions - Electronic Engineering (MCQ) questions & answers

1)   Which among the below mentioned cases are responsible for generating the oscillations with increasing amplitude in time domain response of system function?

A. Complex poles with positive real part
B. Complex poles with negative real part
C. Repeated poles on imaginary axis
D. Repeated poles on real axis

a. A & C
b. B & D
c. B & C
d. A & D
Answer  Explanation 

ANSWER: A & C

Explanation:
No explanation is available for this question!
2)   Which oscillations will be generated in the time domain response, if complex conjugate poles are present with negative real part?

a. Damped oscillations
b. Undamped oscillations
c. Sustained oscillations
d. None of the above
Answer  Explanation 

ANSWER: Damped oscillations

Explanation:
No explanation is available for this question!
3)   For the pole-zero plot given below, what would be the value of system function H(s), if the d.c. gain of the system is 20?

a. 10 (s + 4) / (s + 1) (s2 + 6s - 10)
b. 20 (s - 4) / (s + 3) (s2 _ 6s +10)
c. 40 (s + 4) / (s + 3) (s2 - 6s - 10)
d. 50 (s + 4) / (s + 1) (s2 + 6s +10)
Answer  Explanation 

ANSWER: 50 (s + 4) / (s + 1) (s2 + 6s +10)

Explanation:
No explanation is available for this question!
4)   What is an ideal value of network function at poles?

a. Zero
b. Unity
c. Infinity
d. Finite and non-zero
Answer  Explanation 

ANSWER: Infinity

Explanation:
No explanation is available for this question!
5)   Which among the following belong/s to the category of critical frequency?

a. Poles
b. Zeros
c. Both a and b
d. None of the above
Answer  Explanation 

ANSWER: Both a and b

Explanation:
No explanation is available for this question!
6)   If the complex system function is analytic in nature, the points in s-plane are regarded as ________

a. Ordinary points
b. Singular points
c. Multiple points
d. All of the above
Answer  Explanation 

ANSWER: Ordinary points

Explanation:
No explanation is available for this question!
7)   What does the value of constant 'k' represent in the factorized form of network equation given below?
H(s) = [k (s – z1) (s – z2) ----- (s – zm)] / [(s – p1) (s – p2) ….. (s – pn)]

A. System gain factor
B. Scale factor
C. Vector factor
D. System quality factor

a. A & B
b. C & D
c. A & C
d. B & D
Answer  Explanation 

ANSWER: A & B

Explanation:
No explanation is available for this question!
8)   When a network function is expressed as a ratio of Laplace transforms of output to input variables of a system, then it is regarded as _______

a. System function
b. Transfer function
c. Both a and b
d. None of the above
Answer  Explanation 

ANSWER: Both a and b

Explanation:
No explanation is available for this question!
9)   Transfer admittance function is the ratio of Laplace transforms of ________

a. Current at one port to voltage at other port
b. Voltage at one port to current at other port
c. Current at one port to current at other port
d. Voltage at one point to voltage at other port
Answer  Explanation 

ANSWER: Current at one port to voltage at other port

Explanation:
No explanation is available for this question!
10)   Compute the voltage ratio transfer function for the network shown below. Assume that the current flowing through the branch between node 'a' & 'Q' is (Ia + 4 Ia) i.e. 5Ia

a. -3/7
b. -5/11
c. -3/11
d. -5/7
Answer  Explanation 

ANSWER: -5/11

Explanation:
No explanation is available for this question!
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