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IV Year
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1. For all positive numbers x and y which of following functions is f(x
(A) f(A) = a2 (B) f(A)= a+1
2. Find the wrong number in the series 2, 6, 29, 146, 877, 6140
(A) 6140 (B) 2
3. In the sentence given below, pick up one option, which is most nearly same in meaning as the
word printed in bold, and can replace it without altering
Being a member of this club, he has certain
(A) status (B) truth
4. In the following question, choose the word which is the exact OPPOSITE of the given word.
NIGGARDLY
(A) Frugal (B) Thrifty
5. Pick out the most effective word from the given words to fill in the blank to make the sentence
meaningfully complete.
If negotiations are to prove fruitful, there must not only be sincerity on each side, but there must
also be ........... in the sincerity of the other side.
(A) Faith (B) Belief
6. B and C working together can do a job in 24 days. After working together for 15 days, B left. C took
15 more days to do the remaining job. If B works
(A) 30 (B) 40
7. A dishonest dealer marks up the price of his goods by 20% and gives a discount of 10% to the
customer. Besides, he also cheats both his supplier and his buyer by 100 grams wh
selling 1 kilogram. Find the percentage profit earned by the shopkeeper.
(A) 30 (B) 35
8. In a group of 6 boys and 4 girls, 4 children are to be selected. In how many different ways they
can be selected such that atleast 2 b
(A) 100 (B) 205
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SPACE FOR ROUGH WORK
Section-I: General Ability
or all positive numbers x and y which of following functions is f(x-y) = f(x) - f(y)
f(A)= a+1 (C) ( )f A a= (D) f(A)=
the series 2, 6, 29, 146, 877, 6140
2 (C) 29 (D) 6
In the sentence given below, pick up one option, which is most nearly same in meaning as the
word printed in bold, and can replace it without altering meaning of sentence.
Being a member of this club, he has certain rights.
truth (C) virtues (D) privileges
In the following question, choose the word which is the exact OPPOSITE of the given word.
Thrifty (C) Stingy (D) Generous
Pick out the most effective word from the given words to fill in the blank to make the sentence
If negotiations are to prove fruitful, there must not only be sincerity on each side, but there must
........... in the sincerity of the other side.
Belief (C) Substance (D) Certainty
B and C working together can do a job in 24 days. After working together for 15 days, B left. C took
15 more days to do the remaining job. If B works alone, in how many days can he finish the job?
40 (C) 48 (D) 60
A dishonest dealer marks up the price of his goods by 20% and gives a discount of 10% to the
customer. Besides, he also cheats both his supplier and his buyer by 100 grams wh
selling 1 kilogram. Find the percentage profit earned by the shopkeeper.
35 (C) 32 (D) 29
In a group of 6 boys and 4 girls, 4 children are to be selected. In how many different ways they
can be selected such that atleast 2 boys are there?
205 (C) 185 (D) 211
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f(y)
f(A)= -3a
In the sentence given below, pick up one option, which is most nearly same in meaning as the
privileges
In the following question, choose the word which is the exact OPPOSITE of the given word.
Generous
Pick out the most effective word from the given words to fill in the blank to make the sentence
If negotiations are to prove fruitful, there must not only be sincerity on each side, but there must
Certainty
B and C working together can do a job in 24 days. After working together for 15 days, B left. C took
alone, in how many days can he finish the job?
A dishonest dealer marks up the price of his goods by 20% and gives a discount of 10% to the
customer. Besides, he also cheats both his supplier and his buyer by 100 grams while buying and
In a group of 6 boys and 4 girls, 4 children are to be selected. In how many different ways they
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IV Year
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9. 80 percent of the employees in a company are male. 10 percent of the employees in the company are
currently in Tamilnadu. Of the employees in Tamilnadu, 40 percent are in Chennai, 40 percent are in
Coimbatore, and 20 percent are in Trichy. Of the employees at Chennai, 75 percent are male. What
percent of the company's female employees are currently in Chennai?
(A) 18 percent (B) 15 percent
10. Average traffic at Paradise X
respective value during Thursday
are possible for average traffic for all days (in vehicles per minute)?
(i) 16 (ii) 20
(A) Only ii (B) ii and iii
11. You win some and loose some. You must enjoy winning. But do not let it go to the head. The
moment it does, you are already on your way to failure. If you encounter a failure, don’t beat
yourself for it or anyone else for that matter.
Accept it, look at your own share in the problem, learn from it and move on.
(A) Where there is a will there is a way
(B) Failure is the stepping stone of success
(C) Winners don’t do different things, but do things differently.
(D) When you lose, don’t lose the lesson
12. Janak is participating in a 180 km bike race. Janak rides at an average speed of 30 km per hour for
the first one-third distance, 20 km per hour for the next one
the final 60 km. What was Janak’s average speed for the race?
(A) 15 km/h (B) 16.67 km/h
13. In question below, there is a sentence of which some parts has been jumbled up. Rearrange these
parts, which are labeled P, Q, R, and S to produce the correct sentence. Choose the proper
sequence. It would
(P) appear from his statement
(R) in dealing with the strike
The proper sequence should be:
(A) RPSQ (B) PSQR
Year – Electronics & Communication Engineering
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SPACE FOR ROUGH WORK
80 percent of the employees in a company are male. 10 percent of the employees in the company are
currently in Tamilnadu. Of the employees in Tamilnadu, 40 percent are in Chennai, 40 percent are in
tore, and 20 percent are in Trichy. Of the employees at Chennai, 75 percent are male. What
percent of the company's female employees are currently in Chennai?
15 percent (C) 21 percent (D) 6 percent
Average traffic at Paradise X roads during Monday-Thursday is 21 vehicles per minute. The
respective value during Thursday-Sunday is 28 vehicles per min. Which of the following values
are possible for average traffic for all days (in vehicles per minute)?
20 (iii) 28
ii and iii (C) i and iii (D) i, ii, and iii
You win some and loose some. You must enjoy winning. But do not let it go to the head. The
moment it does, you are already on your way to failure. If you encounter a failure, don’t beat
urself for it or anyone else for that matter.
Accept it, look at your own share in the problem, learn from it and move on. Choose the summary:
Where there is a will there is a way
Failure is the stepping stone of success
fferent things, but do things differently.
lose the lesson
Janak is participating in a 180 km bike race. Janak rides at an average speed of 30 km per hour for
third distance, 20 km per hour for the next one-third distance, and 10 km per hour for
the final 60 km. What was Janak’s average speed for the race?
16.67 km/h (C) 22.5 km/h (D) 16.36 km/h
In question below, there is a sentence of which some parts has been jumbled up. Rearrange these
ts, which are labeled P, Q, R, and S to produce the correct sentence. Choose the proper
appear from his statement (Q) about the policy of management
in dealing with the strike (S) that he was quite in the dark
nce should be:
PSQR (C) RQPS (D) PRQS
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80 percent of the employees in a company are male. 10 percent of the employees in the company are
currently in Tamilnadu. Of the employees in Tamilnadu, 40 percent are in Chennai, 40 percent are in
tore, and 20 percent are in Trichy. Of the employees at Chennai, 75 percent are male. What
6 percent
Thursday is 21 vehicles per minute. The
Sunday is 28 vehicles per min. Which of the following values
i, ii, and iii
You win some and loose some. You must enjoy winning. But do not let it go to the head. The
moment it does, you are already on your way to failure. If you encounter a failure, don’t beat
Choose the summary:
Janak is participating in a 180 km bike race. Janak rides at an average speed of 30 km per hour for
distance, and 10 km per hour for
16.36 km/h
In question below, there is a sentence of which some parts has been jumbled up. Rearrange these
ts, which are labeled P, Q, R, and S to produce the correct sentence. Choose the proper
about the policy of management
PRQS
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IV Year
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14. There are 65 questions in a 3 hr examination. Among these questions there are 15 general aptitude
problems. It is suggested that two
as for each other question. How many minutes should be spent on general aptitude problems?
(A) 30 (B) 45
15. According to the Sci-True Lab, the new micro
identified once as spherical, once as cubical,
the same shape twice.
Which of the following is implied in the above statement?
(A) The new micro-organism can be expected eventually to assume every possible shape.
(B) The new micro-organism is different from all organisms previously known.
(C) The Sci-True Lab is not a reliable source of information about the new micro
(D) The new micro-organism can be identified on the basis of some characteristic other t
16. Choose the best inference from the given statement
Statement: If it does not rain throughout this month, most farmers will be in trouble this year.
(A) Most of the farmers are generally dependent on rains.
(B) There is no water in the ponds
(C) The monsoon Winds are late this year.
(D) Wheat and paddy require water for cultivation.
17. Choose a pair that has most similar relationship to the given pair
Interested: Zealous
(A) Wild: Bizarre
(C) Hateful: Nauseous
18. In a survey of unemployed, three
the survey may underestimate the proportion of respondents who are dishonest, because________.
(A) Some dishonest respondents taking the survey might have claimed to be honest on the survey
(B) Some generally honest respondents taking the survey might have claimed on the survey to be
dishonest
(C) Some respondents who claimed on the survey to be at least a little di
(D) Some respondents who claimed on the survey to be dishonest may have been answering honestly
Year – Electronics & Communication Engineering
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SPACE FOR ROUGH WORK
There are 65 questions in a 3 hr examination. Among these questions there are 15 general aptitude
problems. It is suggested that two-thirds as much time be spent on each general aptitude problem
for each other question. How many minutes should be spent on general aptitude problems?
45 (C) 50 (D) 60
True Lab, the new micro-organism is discovered in certain lakes was
identified once as spherical, once as cubical, and once as spiral, but has never been seen to assume
Which of the following is implied in the above statement?
organism can be expected eventually to assume every possible shape.
organism is different from all organisms previously known.
True Lab is not a reliable source of information about the new micro
organism can be identified on the basis of some characteristic other t
Choose the best inference from the given statement
: If it does not rain throughout this month, most farmers will be in trouble this year.
Most of the farmers are generally dependent on rains.
e ponds
The monsoon Winds are late this year.
Wheat and paddy require water for cultivation.
Choose a pair that has most similar relationship to the given pair
(B) Decent: Contemporary
(D) Hungry: Ravenous
In a survey of unemployed, three-fifths admitted to being at least somewhat dishonest. However,
the survey may underestimate the proportion of respondents who are dishonest, because________.
respondents taking the survey might have claimed to be honest on the survey
Some generally honest respondents taking the survey might have claimed on the survey to be
Some respondents who claimed on the survey to be at least a little dishonest may be very dishonest
Some respondents who claimed on the survey to be dishonest may have been answering honestly
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There are 65 questions in a 3 hr examination. Among these questions there are 15 general aptitude
thirds as much time be spent on each general aptitude problem
for each other question. How many minutes should be spent on general aptitude problems?
organism is discovered in certain lakes was
and once as spiral, but has never been seen to assume
organism can be expected eventually to assume every possible shape.
organism is different from all organisms previously known.
True Lab is not a reliable source of information about the new micro-organism.
organism can be identified on the basis of some characteristic other than shape.
: If it does not rain throughout this month, most farmers will be in trouble this year.
fifths admitted to being at least somewhat dishonest. However,
the survey may underestimate the proportion of respondents who are dishonest, because________.
respondents taking the survey might have claimed to be honest on the survey
Some generally honest respondents taking the survey might have claimed on the survey to be
shonest may be very dishonest
Some respondents who claimed on the survey to be dishonest may have been answering honestly
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IV Year
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19. Identify the choice that replaces the underlined part to form a logically and grammatically correct
statement.
The greatest obstacle to economic and environmental improvements in
mammoth foreign debt.
(A) developing countries is its
(C) developing countries is their
20. Data of different states regarding population of states in the year 1998:
Total population of given states = 32,
Following table shows that sex & literacy wise population ratio:
States Sex
Male
Andhra Pradesh 5
Madhya Pradesh 3
Delhi 2
Goa 3
Bihar 3
Uttar Pradesh 3
Tamil Nadu 3
What will be the total percentage of total number of males in U.P, M.P & Goa together to the total
population of all given states ?
(A) 28.5% (B) 18.5%
Goa
12%
Bihar
11%
Year – Electronics & Communication Engineering
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SPACE FOR ROUGH WORK
Identify the choice that replaces the underlined part to form a logically and grammatically correct
The greatest obstacle to economic and environmental improvements in developing countries is its
developing countries is its (B) the developing countries is its
developing countries is their (D) the developing countries is their
Data of different states regarding population of states in the year 1998:
Total population of given states = 32, 76,000
Following table shows that sex & literacy wise population ratio:
Sex Literacy
Female Literate Illiterate
3 2 7
1 1 4
3 2 1
5 3 2
4 4 1
2 7 2
4 9 4
What will be the total percentage of total number of males in U.P, M.P & Goa together to the total
population of all given states ?
18.5% (C) 23% (D) 32%
A.P
25%
M.P
20%
Delhi
8%
Goa
12%
Bihar
11%
U.P
15%
T.N
9%
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Identify the choice that replaces the underlined part to form a logically and grammatically correct
developing countries is its
eir
What will be the total percentage of total number of males in U.P, M.P & Goa together to the total
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IV Year
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21. The voltage across the last resistor is V. All the resistors are unity. Then V
(A) 13V
(B) 19V
(C) 25V
(D) 8V
22. Let p be the probability that a man aged y
probability that a man among ‘n’ men of all aged ‘y’ will get into accident first?
(A) ( )n1
1 1 pn − − (B)
1
n
23. Analog switch of sample and hold circuit as shown in figure has ON resistance of
amplifier has input bias current of
open is
(A) 0.01V / sec
(B) 0.1V / sec
(C) 0.1mV / sec
(D) None
24. An inductor of inductance 0.25 H & resistance 50
The magnitude of the voltage across the capacitor at 1 kHz is
(Assuming that the supply is 5 V)
(A) 157.1 V (B) 179.2 V
SV
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SPACE FOR ROUGH WORK
Section-II: Technical
voltage across the last resistor is V. All the resistors are unity. Then VS is
Let p be the probability that a man aged y will get into an accident in a year. What is the
probability that a man among ‘n’ men of all aged ‘y’ will get into accident first?
( )n1
1 1 pn − + (C)
( )n
1 p
n
− (D) n 1 1 p − −
Analog switch of sample and hold circuit as shown in figure has ON resistance of
amplifier has input bias current of 1 A.µ Then the discharging rate of capacitor ‘C’ when switch is
An inductor of inductance 0.25 H & resistance 50 Ω resonates with a series capacitor at 1 kHz.
The magnitude of the voltage across the capacitor at 1 kHz is
(Assuming that the supply is 5 V)
179.2 V (C) 200 V (D) 31.4 V
+
−
1Ω 1Ω 1Ω
1Ω1Ω
+
−V1Ω
switch
Input Buffer output amplifier
C 100 F= µ
S
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will get into an accident in a year. What is the
probability that a man among ‘n’ men of all aged ‘y’ will get into accident first?
( )n
n 1 1 p − −
Analog switch of sample and hold circuit as shown in figure has ON resistance of 100 .Ω Output
Then the discharging rate of capacitor ‘C’ when switch is
resonates with a series capacitor at 1 kHz.
31.4 V
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IV Year
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25. In a class – B push pull operation, the D.C. power drawn is 28W
amplifier to the load at its maximum power conversion efficiency is
(A) 40W (B) 19W
26. In the following Op-Amp, when only
and when only 2V of 2 V is applied and
is approximately
(A) 13 dB (B) 20 dB
(C) 43 dB (D) 68 dB
27. Given a function f(t) as shown below.
The above signal is fed as input to (all inp
domain)
The magnitude of output at
(A) 1 (B) 0
28. Given: ( )dy
3 1 x ydx
= + − and y = 4 when x = 1. Using Runga
approximate value of y when x = 1.2 will be
(A) 0.419 (B) 0.519
F(j )ω 4
ω
1−
Year – Electronics & Communication Engineering
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SPACE FOR ROUGH WORK
B push pull operation, the D.C. power drawn is 28W. The power delivered by the
amplifier to the load at its maximum power conversion efficiency is
19W (C) 32W (D) 22W
Amp, when only 1V of 1 V is applied and 2V is grounded then output is
of 2 V is applied and 1V is kept at 0 V, output is 20 V then CMRR of op
20 dB
68 dB
Given a function f(t) as shown below.
The above signal is fed as input to (all inputs, outputs and system function given in frequency
The magnitude of output at 2
πω = rad/sec is
0 (C) 0.08 (D) 0.64
and y = 4 when x = 1. Using Runga-Kutta fourth order method, the
approximate value of y when x = 1.2 will be
0.519 (C) 0.613 (D) 0.318
+
−1V
2VV
2
4
ω( )
2
f(t)
E1+01−
1
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. The power delivered by the
is grounded then output is -8 V
is kept at 0 V, output is 20 V then CMRR of op-amp
uts, outputs and system function given in frequency
Kutta fourth order method, the
0V
output
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IV Year
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29. A system is having unit step response as
then the group delay at ω =
(A) 0.5 sec (B) 1 sec
30. Consider the system shown in the figure
The D.C component in signal y(t) is
(A) 0.9341 (B) 0
31. The Transfer function ( )( )
Y s
X s
(A) ( ) ( )
( ) ( )1 2
1 2
G s G s 1
1 G s G s
+ −
(B) ( ) ( )
( ) ( )2 1
2 1
G s 1 G s
1 G s G s
+ −
(C) ( ) ( )
( ) ( )1 1
1 2
G s 1 G s
1 G s G s
+ − +
(D) ( ) ( )( )
( ) ( )2 1
1 2
G s 1 G s
1 G s G s
+
+ +
X f
0 33−
34 55
3
f11−
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SPACE FOR ROUGH WORK
A system is having unit step response as ( ) ty t e u(t)−= . If the same system is cascaded with itself,
3 rad / secω = is ________.
1 sec (C) 1.5 sec (D) 2 sec
Consider the system shown in the figure
The D.C component in signal y(t) is
0 (C) 12 (D) 8
))
Y s
X s of the LTI system shown below is
( )1G s
( )2G s
( )X s
+
+
+
+
( )H f
f
2
1
02− 2
1Ω
1F
+
−( )g t (y t
1− 1
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. If the same system is cascaded with itself,
( )Y s
)y t
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IV Year
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32. A source has 256 symbols which are equiprobable and their successive transmissions are
independent. If an AWGN channel with a bandwidth of 4 kHz and SNR of 31 is used for
transmission of symbols, then the maximum rate (in symbols / sec) at which the transm
be made with an arbitrary low probability error is
(A) 1500 (B) 2000
33. Solution for ( 2 2 2 2 2 2
S
a x b y c z dS+ +∫
(A) 4
abc
π (B)
3 abc
34. What is the effect of β on signal to noise ratio at the output for the signal flow diagram shown below?
(A) Increases with increase in
(C) Independent of β
35.
In the above digital circuit, to get an output bit as ‘B
(A) 1 0Select 0;S S 10= =
(C) 1 0Select 1; S S 01= =
Quad ruple
Two to one
Line MUX
− −
3 2 1 0A A A A
3 2 1 0B B B ,B
Select
4
sV
+
+
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SPACE FOR ROUGH WORK
A source has 256 symbols which are equiprobable and their successive transmissions are
independent. If an AWGN channel with a bandwidth of 4 kHz and SNR of 31 is used for
transmission of symbols, then the maximum rate (in symbols / sec) at which the transm
be made with an arbitrary low probability error is
2000 (C) 2500 (D) 3000
)1
2 2 2 2 2 2 2a x b y c z dS−
+ + where S is surface of ellipsoid 2 2 2
ax by cz 1+ + =
4
3 abc
π (C)
4abc
3
π (D) None of these
on signal to noise ratio at the output for the signal flow diagram shown below?
Increases with increase in β (B) Decreases with increase in β
(D) Increase or decreases depending upon sign of
In the above digital circuit, to get an output bit as ‘B2’ what are the values of select and S
(B) 1 0Select 1;S S 10= =
(D) 1 0Select 0; S S 01= =
4 1
MUX
× 2B
1S 0
S
β
1A 2A
nV
0V 0V
1+
+
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A source has 256 symbols which are equiprobable and their successive transmissions are
independent. If an AWGN channel with a bandwidth of 4 kHz and SNR of 31 is used for
transmission of symbols, then the maximum rate (in symbols / sec) at which the transmission can
2 2 2ax by cz 1+ + = is
None of these
on signal to noise ratio at the output for the signal flow diagram shown below?
Increase or decreases depending upon sign of β
of select and S1S0?
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36. Consider the differential equation,
Find the P.I. of the above equation.
(A) 2
cosnx xsin nxlogsecnx +
n n
(C) 2
cosnx xsin nxlogsecnx -
n n
37. A PCM system uses a uniform quantizer which has a range
binary encoder. A zero mean s
uniform probability density. The ratio of the signal power to the quantisation noise power at the
output of the quantizer is
(A) 42 dB (B) 38 dB
38. For the figure shown below,
response peak at a frequency of __________
(A) 3.5 rad/sec
(B) 2.8 rad/sec
(C) 4.3 rad/sec
(D) 6.8 rad/sec
39. Which of the following statements is/are correct?
1. For plane wave propagating in lossless dielectrics, the E&H are in time phase with each other.
2. Total internal reflection may occur when wave is travelling from rarer medium to
medium.
(A) 1 only (B) 2 only
40. For common base operation of a BJT, which of the following are correct?
I. High voltage gain
III. High input resistance
(A) I and II (B) I and III
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SPACE FOR ROUGH WORK
Consider the differential equation, [ ]2
2
2
d yn y sec nx n 0
dx+ = ≠
Find the P.I. of the above equation.
cosnx xsin nx
n n (B)
2
cosnx xsin nxlogcosnx +
n n
cosnx xsinnx
n n (D)
2
cosnx xsin nxlogcosnx -
n n
A PCM system uses a uniform quantizer which has a range –V to +V and it is followed by a 7
binary encoder. A zero mean signal applied to the quantizer extends over its entire range and has
uniform probability density. The ratio of the signal power to the quantisation noise power at the
38 dB (C) 28 dB (D) 18 dB
For the figure shown below, ( )r t sin t.= ω and the steady state response C(t) will exhibit a
at a frequency of ___________ .
Which of the following statements is/are correct?
propagating in lossless dielectrics, the E&H are in time phase with each other.
Total internal reflection may occur when wave is travelling from rarer medium to
2 only (C) both 1, 2 (D) None of these
operation of a BJT, which of the following are correct?
II. Excellent high frequency response
IV. Ideal current buffer
I and III (C) I, II and III (D) I, II and IV
( )r t +
- ( )16
s s 4+( )c t
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V to +V and it is followed by a 7-bit
ignal applied to the quantizer extends over its entire range and has
uniform probability density. The ratio of the signal power to the quantisation noise power at the
18 dB
and the steady state response C(t) will exhibit a
propagating in lossless dielectrics, the E&H are in time phase with each other.
Total internal reflection may occur when wave is travelling from rarer medium to denser
None of these
Excellent high frequency response
I, II and IV
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41. Which of the following statements are false?
1. ( ) ( ).A A A∇ ∇ = ∇ × ∇ × + ∇ur ur ur
Where A is scalar and Aur
is a vector
(A) 1 only (B) 2 only
42.
2 y1
0 y
xydxdy−
∫ ∫ =___________.
(A) 0.392 (B) 0.292
43. The power dissipated in the 5
(A) 2.4W
(B) 1.9W
(C) 3.2W
(D) 8W
44. A 6 GHz EM wave propagates in a parallel plane waveguide, the separation between the planes
being 3 cm. Its phase and group velocities are respectively
(A) 8 8
1.65 10 m / sec, 5.45x10 m/sec×
(C) 8 8
1.65 10 m / sec, 1.65x10 m/sec×
45. The frequency of the pulse at x
(A) 10Hz (B) 15Hz
10-bit
Ring
counter 0x 1x
( )320kHz
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SPACE FOR ROUGH WORK
following statements are false?
2.A A A∇ ∇ = ∇ × ∇ × + ∇ur ur ur
2. ( )A 0∇ × ∇ = 3. (∇ × ∇ × =
is a vector
2 only (C) 3 only (D) None of these
=___________.
0.292 (C) 0.492 (D) 0.153
The power dissipated in the 5 Ω resistor for the circuit shown below is
A 6 GHz EM wave propagates in a parallel plane waveguide, the separation between the planes
cm. Its phase and group velocities are respectively 8 8
1.65 10 m / sec, 5.45x10 m/sec (B) 8 8
5.45 10 m / sec, 1.65x10 m/sec×8 8
1.65 10 m / sec, 1.65x10 m/sec (D) 8 8
5.45 10 m / sec, 3.7x10 m/sec×
The frequency of the pulse at x4 in the network shown below is
15Hz (C) 20Hz (D) 25Hz
4-bit
parallel
counter
Mod 25
Ripple
counter
4-bit
Johnson
counter
2-bit Ring
counter2x 3x 4x
+ − + −
5Ω1Ω10Ω
5V10V
2A
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)A 0∇ × ∇ × =ur
None of these
A 6 GHz EM wave propagates in a parallel plane waveguide, the separation between the planes
5.45 10 m / sec, 1.65x10 m/sec
5.45 10 m / sec, 3.7x10 m/sec
bit Ring
counter 5x
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46. For the network shown below, switch was open for very long time and is thrown at t = 0. The
value VL at t = 1 sec is given by
(A) 0.47 V
(B) 1 V
(C) 1.47 V
(D) Can’t be determined
47. A bar of silicon is doped with acceptors as shown below. The doping density varies smoothly and
monotonically in the x direction from
acceptor profile becomes uniform. The donor density is zero everywhere. This is a thermal equilibrium
situation.
The electrostatic potential is greater at
(A) x=0
(B) L
0 x2
< <
(C) L
x L2
< <
(D) x=L
48. For the circuit diagram shown below,
the series continues upto “n” gates
where n
k k is an int eger3
=
The final output of nth gate is
(A) A (B) A
(C) 1 (D) cannot be determined
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For the network shown below, switch was open for very long time and is thrown at t = 0. The
at t = 1 sec is given by
A bar of silicon is doped with acceptors as shown below. The doping density varies smoothly and
monotonically in the x direction from A i A iN n at x 0 to N n<< = >> at x L. Above x L,= =
acceptor profile becomes uniform. The donor density is zero everywhere. This is a thermal equilibrium
The electrostatic potential is greater at
For the circuit diagram shown below,
the series continues upto “n” gates
k k is an int eger .
gate is
A
cannot be determined
uniformndopingA
N
x0 L
2
L
in
10
V
8
V
Ω20
Ω10
10HL
V
+
−
1
2
3
4
5
1
1
1
1
1
1
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For the network shown below, switch was open for very long time and is thrown at t = 0. The
A bar of silicon is doped with acceptors as shown below. The doping density varies smoothly and
x L. Above x L,= = the
acceptor profile becomes uniform. The donor density is zero everywhere. This is a thermal equilibrium
uniformndoping
61
upto n
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49. The z-transform X(z) of the real and right
them is at j /2z e π= and there are two zeros at the origin. If
followings is true?
(A) ( )( )
2
2
2zX z
z 1 2=
− +, ROC is
(C) ( )( )
2
2
2zX z , ROC is z 1
z 1 2= >
− +
50. The PSD of a narrow band noise n(t) is shown
The carrier frequency is 5 Hz, then the PSD of the
in-phase component of n (t) is
(A)
(C)
( )fN
S f 2.0
2− 1− 1 2
2− 1− 1 20.50.5−
( )1N
S f
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SPACE FOR ROUGH WORK
transform X(z) of the real and right-sided sequence x[n] has exactly two poles and one of
and there are two zeros at the origin. If ( )X 1 1= ,then which one of
, ROC is 1
z 12
< < (B) ( )2
2
2z 1X z , ROC is z
z 1 2= >
+
X z , ROC is z 1= > (D) ( )2
2
2zX z , ROC is z 1
z 1= >
+
The PSD of a narrow band noise n(t) is shown in figure.
The carrier frequency is 5 Hz, then the PSD of the
phase component of n (t) is
(B)
(D)
f
( )IN
S f 2.0
2− 1− 1 2 f
f
( )1N
S f
1− 0.5− 0 0.5 1 f
( )NS f
1.0
7− 5 4 40
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sided sequence x[n] has exactly two poles and one of
,then which one of the
2z 1X z , ROC is z
z 1 2= >
X z , ROC is z 1= >
5 7f