Kerala Plus Two Question Paper 2022 Electronic Systems

Reg. No. : .....................................
Name : ..........................................
SY-53
SECOND YEAR HIGHER SECONDARY EXAMINATION, MARCH 2022

Part – III Time : 2 Hours
ELECTRONIC SYSTEMS Cool-off time : 15 Minutes
Maximum : 60 Scores

General Instructions to Candidates :
 There is a ‘Cool-off time’ of 15 minutes in addition to the writing time.
 Use the ‘Cool-off time’ to get familiar with questions and to plan your answers.
 Read questions carefully before answering.
 Read the instructions carefully.
 Calculations, figures and graphs should be shown in the answer sheet itself.
 Malayalam version of the questions is also provided.
 Give equations wherever necessary.
 Electronic devices except non-programmable calculators are not allowed in the
Examination Hall.
 
    15  ‘  ’ .
 ‘  ’    
 .
      .
    .
  , , ,   
.
   .
    .
     
    .

SY-53 1 P.T.O.

PART – I

A. Answer any 5 questions from 1 to 9. Each carries 1 score. (5  1 = 5)

1. An integrator act as ________ filter.

2. The amplifier used in RC phase shift oscillator is _______.

(CE Amplifier, CB Amplifier, CC Amplifier, None of these)

3. Total phase shift of an oscillator is ________.

(180º, 270º, 360º, 90º)

4. The output wave form of a Hartley Oscillator is ________.

(Sine wave, Square wave, Triangular wave, Saw tooth wave)

5. In IC fabrication, selectively removing unwanted material from the surface of the
wafer is ________.

(Deposition, Lithography, Etching, None of these)

6. The transistors in SMPS switches between ________ regions.

(Active and Saturation, Saturation and Cutoff, Cutoff and Active, None of these)

7. A Toggle flip-flop has _______ number of data inputs.

8. ________ is the angle of incidence above which total internal reflection occurs.

9. ________ is a 8 bit micro-processor.

(8086, 8085, 80286, None of these)

SY-53 2

PART – I
A. 1  9    5  .
1  . (5  1 = 5)

1.  Integrator ________   .

2. RC phase shift oscillator-   _______ .

(CE Amplifier, CB Amplifier, CC Amplifier, None of these)

3.  oscillator-  phase shift ________ .
(180º, 270º, 360º, 90º)

4. Hartley     ________ .

(Sine wave, Square wave, Triangular wave, Saw tooth wave)

5. IC     
 ________.
(Deposition, Lithography, Etching, None of these)

6. SMPS- transistors ________ regions-   .

(Active and Saturation, Saturation and Cutoff, Cutoff and Active, None of these)

7.  Toggle flip-flop-    _______ .

8. ________ Angle-  total   .

9. ________  8    .

(8086, 8085, 80286, None of these)

SY-53 3 P.T.O.

B. Answer all questions from 10 to 13. Each carries 1 score. (4  1 = 4)

10. The cutoff frequency of a RC high pass filter is ______.

 1 1 
 , , 2RC, 3.14 RC 
 2LC 2RC 

1
11. f= is the frequency of oscillation of _______ oscillator.
2π LC

(Crystal, Hartley, RC phase shaft, None of these)

12. What does LSI stands for ?

(Logic System Integration, Large Scale Integration, Logic System Input, None of
these)

13. Defibrillator is a ________ group equipment.

(Diagnostic, Analytical, Therapeutic, None of these)

PART – II

A. Answer any 2 questions from 14 to 17. Each carries 2 scores. (2  2 = 4)

14. Draw the output wave form of a positive clamper whose input is a sinusoidal voltage
with peak to peak amplitude is 2 Vm.

15. Define CMRR of an OP-AMP.

16. Write the truth table of SR flip-flop.

17. Write short note on GSM.

SY-53 4

B. 10  13    . 1  .
(4  1 = 4)
10. RC    cutoff  ______ .

 1 1 
 , , 2RC, 3.14 RC 
 2LC 2RC 

1
11. f = _______  Frequency of 
2π LC
.
(Crystal, Hartley, RC phase shaft, None of these)

12. LSI     ?

(Logic System Integration, Large Scale Integration, Logic System Input, None of
these)

13. Defibrillator ________  .

(Diagnostic, Analytical, Therapeutic, None of these)

PART – II
A. 14  17    2  .

2  . (2  2 = 4)

14.    2 Vm peak to peak amplitude  sinusoidal 
  output   .

15. OP-AMP- CMRR .

16. SR flip-flop    .

17. GSM     .

SY-53 5 P.T.O.

B. Answer any 2 questions from 18 to 20. Each carries 2 scores. (2  2 = 4)

18. Draw the circuit diagram of a series voltage regulator.

19. Name the four different types of shift registers.

20. What is graded index optical fiber ?

PART – III

A. Answer any 3 questions from 21 to 24. Each carries 3 scores. (3  3 = 9)

21. With a neat circuit diagram explain the working of RC phase shift oscillator.

22. What are the different steps of IC fabrication ?

23. (a) What does RADAR stands for ? (1)

(b) Draw the block diagram of a RADAR. (2)

24. What are the advantages of fibre optic communication ?

B. Answer any 2 questions from 25 to 27. Each carries 3 scores. (2  3 = 6)

25. (a) Draw the circuit diagram of a voltage follower using Op-Amp 741. (2)

(b) Give one application of voltage follower. (1)

26. Distinguish between analog and digital TV.

27. Write short note on Blue Tooth Communication.

SY-53 6

B. 18  20    2  .

2  . (2  2 = 4)

18. Series     .

19.   shift registers  .

20. Graded index optical fiber   ?

PART – III
A. 21  24    3  .
3  . (3  3 = 9)
21.    RC phase shift  
.

22. IC    .

23. (a) RADAR-   . (1)
(b) RADAR- Block diagram . (2)

24.      .

B. 25  27    2  .
3  . (2  3 = 6)
25. (a) Op-Amp 741     
. (2)
(b)     . (1)

26.  TV   TV  .  .

27. Blue Tooth      .

SY-53 7 P.T.O.

PART – IV

A. Answer any 3 questions from 28 to 31. Each carries 4 scores. (3  4 = 12)

28. With the help of a neat circuit diagram, explain the working of an Astable

multivibrator using IC 555.

29. (a) Draw the block diagram of a SMPS. (3)

(b) Give one application of SMPS. (1)

30. (a) Draw the circuit diagram of a 4 : 1 multiplexer. (2½)

(b) Write the truth table of 4 : 1 multiplexer. (1½)

31. Draw a neat block diagram of ECG machine.

B. Answer any 1 question from 32 to 33. Carries 4 scores. (1  4 = 4)

32. (a) Draw the circuit diagram and output wave form of RC differentiator for a square

wave input signal. (3)

(b) Write one advantage of an active filter over passive filter. (1)

33. Draw the circuit diagram of a 3 bit Serial In Serial Out (SISO) shift register using

flip-flop and explain its working.

SY-53 8

PART – IV

A. 28  31    3  .

4  . (3  4 = 12)

28. IC 555  Astable multivibrator –   

.

29. (a) SMPS- block diagram . (3)

(b) SMPS-   . (1)

30. (a) 4 : 1    . (2½)

(b) 4 : 1    . (1½)

31. ECG    .

B. 32  33    1  .

4 . (1  4 = 4)

32. (a) RC differentiator    square wave 

output   . (3)

(b) Active filter       . (1)

33. Flip-flop  3      (SISO) 

 circuit diagram   .

SY-53 9 P.T.O.

PART – V

Answer any 2 questions from 34 to 36. Each carries 6 scores. (2  6 = 12)

34. (a) What is a clipper ? (1)

(b) Draw the circuit diagram of a clipper circuit for obtaining the given output wave
from a sine wave input. (3)

(c) Draw the output wave form of given clamper circuit. (2)

35. (a) Draw the block diagram of JK Master Slave flip-flop and write the Truth Table. (4)

(b) Compare asynchronous and synchronous counter. (2)

36. (a) With the help of a block diagram, explain the working of a Public Address
System. (3)

(b) Explain the constructional details of a Loud Speaker. (3)

__________

SY-53 10

PART – V
34  36    2  .

6  . (2  6 = 12)

34. (a)   clipper  ? (1)

(b)  sine wave     output
wave from   clipper   . (3)

(c)   clamper circuit      . (2)

35. (a)  JK Master Slave flip-flop     Truth Table
. (4)

(b) Asynchronous  synchronous counter   . (2)

36. (a)  block diagram-  Public Address System-
 . (3)

(b) Loud Speaker- Constructional details . (3)

__________

SY-53 11 P.T.O.

SY-53 12