Electronics and Communication Engineering - Exam Questions Papers

36. 

Assuming that flip-flops are in reset condition initially, the count sequence observed at QA in the circuit shown is

A. 0010111...
B. 0001011...
C. 0101111...
D. 0110100...

Answer: Option D

Explanation:


37. 

The Taylor series expansion of at x = p is given by

A.
B.
C.
D.

Answer: Option D

Explanation:

.


38. 

F = ∑(0, 3, 4, 5, 7) =

A. [B ⊕ C] + AC
B. B'C' + BC + AC
C. AB + BC + CA
D. None

Answer: Option B

Explanation:


39. 

The matrix A is defined as A = . The eigen values of A2 are

A. -1, -9, -4
B. 1, 9, 4
C. 1, 3, -2
D. -1, -3, 2

Answer: Option B

Explanation:

Since the given matrix is triangular, roots are elements of the principle diagonal.

i.e. 1A = - 1, - 3, 2

1A2 = (- l)2, (- 3)2, (2)2 = 1, 9, 4.


40. 

A uniform plane wave travelling in air is incident on the plane boundary between air and another dielectric medium with er = 15. The reflection coefficient for normal incidence is

A. 0.6 ∠0°
B. 1 ∠0°
C. 0.6 ∠180°
D. 1.2 ∠180°

Answer: Option C

Explanation:

Coefficient =

Coefficient = 0.6 ∠180°.