Electronics and Communication Engineering - Exam Questions Papers

36. 

Signal flow graph is used to find :

A. stability of the system
B. controllability of the system
C. transfer function of the system
D. poles of the system

Answer: Option D

Explanation:

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37. 

Diffusion current of holes in a semiconductor is proportional to (with p = concentration of holes/unit volume)

A.
B.
C.
D.

Answer: Option B

Explanation:

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38. 

Which junction has least junction capacitance?

A. Alloy
B. Grown
C. Diffused
D. Point contact

Answer: Option D

Explanation:

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39. 

Consider a multiplexer with X and Y as data inputs and Z as control input. Z = 0 selects input X and Z = 1 selects input Y. What are the connections required to realize the 2-variable Boolean function f = T + R, without using any additional hardware?

A. R to X, 1 to Y, T to Z
B. T to X, R to Y, T to Z
C. T to X, R to Y, 0 to Z
D. R to X, 0 to Y, T to Z

Answer: Option A

Explanation:

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40. 

A system is described by following equations of state variables analysis.
, C = [1 1]
The steady state error due to step input is:

A.
B.
C.
D.

Answer: Option C

Explanation:

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