Electronics and Communication Engineering - Exam Questions Papers

16. 

For pole-zero plot shown, the system is __________ .

A. minimum phase
B. maximum phase
C. mixed phase
D. none of these

Answer: Option A

Explanation:

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17. 

Which of the following equations results from the circuital form of Ampere's law?

A.
B. ∇ . B = 0
C. ∇ . B = r
D.

Answer: Option D

Explanation:

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18. 

Which one of the following is not LED material?

A. GaAs
B. GaP
C. SiC
D. SiO2

Answer: Option D

Explanation:

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19. 

Consider the following statements:

  1. A flip-flop is used to store 1-bit of information.
  2. Race-around condition occurs in a J-K flip-flop when both the inputs are 1.
  3. Master-slave configuration is used in flip-flops to store 2-bits of information
  4. A transparent latch consists of a D-type flip-flop.
Which of the above statements is/are correct?

A. 1 only
B. 1, 3 and 4
C. 1, 2 and 4
D. 2 and 3 only

Answer: Option C

Explanation:

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20. 

A balanced modulator is used in the generation of which of the following?

A. DSB-SC signal
B. FM signal
C. PM signal
D. PAM signal

Answer: Option A

Explanation:

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