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Electronics and Communication Engineering - Exam Questions Papers

Exercise : Exam Questions Papers - Exam Paper 12
36.
Assuming that flip-flops are in reset condition initially, the count sequence observed at QA in the circuit shown is
0010111...
0001011...
0101111...
0110100...
Answer: Option
Explanation:

37.
The Taylor series expansion of at x = p is given by
Answer: Option
Explanation:

.

38.
F = ∑(0, 3, 4, 5, 7) =
[B ⊕ C] + AC
B'C' + BC + AC
AB + BC + CA
None
Answer: Option
Explanation:

39.
The matrix A is defined as A = . The eigen values of A2 are
-1, -9, -4
1, 9, 4
1, 3, -2
-1, -3, 2
Answer: Option
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
0.6 ∠0°
1 ∠0°
0.6 ∠180°
1.2 ∠180°
Answer: Option
Explanation:

Coefficient =

∴ Coefficient = 0.6 ∠180°.

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