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Electronics and Communication Engineering - Exam Questions Papers

Exercise : Exam Questions Papers - Exam Paper 3
16.
Impedance function for the network shown below is:
(3s + 1)
2s + 3
Answer: Option
Explanation:

17.
The function f = A ⊕ B ⊕ A ⊕ D ⊕ E ⊕ C ⊕ D ⊕ E ⊕ F ⊕ G ⊕ F ⊕ G ⊕ C ⊕ E ⊕ A ⊕ D ⊕ B ⊕ E ⊕ E ⊕ B ⊕ B ⊕ B ⊕ B ⊕ D can be written as
A ⊕ B ⊕ D
A ⊕ B ⊕ E
A ⊕ E
A ⊕ E
Answer: Option
Explanation:

A A B B C D D E E F G

2 1 3 3 2 3 1 4 1 2 2

0 A B B 0 D D 0 E 0 0

f = A ⊕ B ⊕ B ⊕ D ⊕ D ⊕ E

= A ⊕ 1 ⊕ 1 ⊕ E

= A ⊕ 0 ⊕ E = A ⊕ E.

18.
Which of the following functions would have only odd powers of x in its Taylor series expansion about the point x = 0?
sin (x3)
sin (x2)
cos (x3)
cos (x2)
Answer: Option
Explanation:

Thus sin(x3) will have odd powers

Sin (x2) will have even powers

Cos (x3) will have even powers

Cos (x2) will have even powers.

19.
Find the maximum power that can be delivered to a load
0.025 W
2.5 W
2.5 W
0.25 W
Answer: Option
Explanation:

PL = I2R = x R •••(i)

where zS = 100 + j50

zL = 100 - j50

Putting the values in eq. (i)

PL =X l00 = 0.25 watts.

20.
For a integrator circuit, Ri = 100 KΩ, CF = 10 μF. The input is a step dc voltage as shown below. Its output will be
Answer: Option
Explanation:

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