Electronics and Communication Engineering - Exam Questions Papers

11. 

A second order system has the transfer function . With r(t) as the unit step function, the response c(t) of the system is represented by

A. figure (a)
B. figure (b)
C. figure (c)
D. figure (d)

Answer: Option B

Explanation:

Take Inverse L.T. and then observe Plot.


12. 

For a four point DFT, Linear transformation matrix will be:

A.
B.
C.
D.

Answer: Option B

Explanation:


13. 

In the circuit, the value of the voltage source E

A. -22 V
B. -12 V
C. +12 V
D. -10 V

Answer: Option A

Explanation:

13 + 4 + E + 5 = 0

E = - 22 V.


14. 

Skin depth depends on

A. f
B. f2
C. f
D.

Answer: Option D

Explanation:


15. 

The following Variable Entered Map (VEM) represents which of the following function:

A. f(A, B, C, D) = ∑(1, 2, 3, 4, 7, 8, 9, 14, 15) + Φ(3, 5, 12, 13)
B. f(A, B, C, D) = ∑(1, 2, 4, 8, 10, 8, 13, 15) + Φ(3, 6, 12, 14)
C. f(A, B, C, D) = ∑(1, 2, 4, 7, 8, 10, 13, 15) + Φ(6, 12, 13)
D. f(A, B, C, D) = ∑(1, 2, 4, 7, 8, 9, 12, 13) + Φ(3, 5, 14, 15)

Answer: Option D

Explanation:

f(A, B, C, D) = A B C [D(0) + D(1)] + A B C[D(1) + D(f)]

+ A BC[D(0) + D(1)] + A BC[D(0) + D(1)] + AB C[D(1) + D(1)]

+ AB C[D(0) + D(0)] + ABC[D(1) + D(1)] + ABC[D(Φ) + D(Φ)]

= ∑(1, 2, 4, 7, 8, 9, 12, 13) + Φ(3, 5, 14, 15).