# 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
figure (a)
figure (b)
figure (c)
figure (d)
Explanation:

Take Inverse L.T. and then observe Plot.

12.
For a four point DFT, Linear transformation matrix will be:
Explanation:

13.
In the circuit, the value of the voltage source E
-22 V
-12 V
+12 V
-10 V
Explanation:

13 + 4 + E + 5 = 0

E = - 22 V.

14.
Skin depth depends on
f
f2
f
Explanation:

15.
The following Variable Entered Map (VEM) represents which of the following function:
f(A, B, C, D) = ∑(1, 2, 3, 4, 7, 8, 9, 14, 15) + Φ(3, 5, 12, 13)
f(A, B, C, D) = ∑(1, 2, 4, 8, 10, 8, 13, 15) + Φ(3, 6, 12, 14)
f(A, B, C, D) = ∑(1, 2, 4, 7, 8, 10, 13, 15) + Φ(6, 12, 13)
f(A, B, C, D) = ∑(1, 2, 4, 7, 8, 9, 12, 13) + Φ(3, 5, 14, 15)
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).