Exercise: Exam Question Papers

Questions for: Exam Question Papers

Find the maximum power that can be delivered to a load
A:
0.025 W
B:
2.5 W
C:
2.5 W
D:
0.25 W
Answer: D

PL = I2R = x R รขโ‚ฌยขรขโ‚ฌยขรขโ‚ฌยข(i)

where zS = 100 + j50

zL = 100 - j50

Putting the values in eq. (i)

PL =X l00 = 0.25 watts.

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Which of the following functions would have only odd powers of x in its Taylor series expansion about the point x = 0?
A:
sin (x3)
B:
sin (x2)
C:
cos (x3)
D:
cos (x2)
Answer: A

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.

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The function f = A โŠ• B โŠ• A โŠ• D โŠ• E โŠ• C โŠ• D โŠ• E โŠ• F โŠ• G โŠ• F โŠ• G โŠ• C โŠ• E โŠ• A โŠ• D โŠ• B โŠ• E โŠ• E โŠ• B โŠ• B โŠ• B โŠ• B โŠ• D can be written as
A:
A โŠ• B โŠ• D
B:
A โŠ• B โŠ• E
C:
A โŠ• E
D:
A โŠ• E
Answer: D

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 โŠ• B โŠ• B โŠ• D โŠ• D โŠ• E

= A โŠ• 1 โŠ• 1 โŠ• E

= A โŠ• 0 โŠ• E = A โŠ• E.

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Impedance function for the network shown below is:
A:
(3s + 1)
B:
C:
D:
2s + 3
Answer: C

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For the network shown below, the Thevenin voltage and RTH is equal to __________
A:
0 V, 58.82 ฮฉ
B:
0 V, 96.774 ฮฉ
C:
0 V, 3 Kฮฉ
D:
None of these
Answer: A

Since there is no independent source in the network; VTH = 0. To find RTH apply 1 A current source across A and B.

Apply KCL at node Vx

as

Solving Vx = 58.82 V

โˆด .

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