Kerala Plus Two Question Paper 2024 Electronics

Kerala Board

Question Paper
2024

Reg. No. : ......................................
SY-531 Name : ...........................................

SECOND YEAR HIGHER SECONDARY EXAMINATION, MARCH – 2024

Part – III Time : 2 Hours
ELECTRONICS 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-531 1 P.T.O.

Answer all questions from 1 to 9. Each carries 1 score. (9  1 = 9)
1. Negative clipper is used to remove which half cycle of the input signal ?
(Positive, Negative, Both Positive and Negative, None of the above)

2. Which one is a sequential circuit in the list given below ?

(Multiplexer, Demultiplexer, Encoder, Flip Flop)

3. In FM, which character of the carrier is varied with the modulating signal ?

(Amplitude, Frequency, Phase, Voltage)

4. Which frequency band is used in FM Radio Broadcast ?

(HF, VHF, UHF, SHF)

5. Through optical fiber cable, signal travels in the form of ______
(Radio wave, Electrical Signal, Light, Digital)

6. The total channel band width required in Television transmission is ______

(6 MHz, 7 MHz, 8 MHz, 9 MHz)

7. Which of the following is an input device ?

(Head phone, Scanner, Printer, Monitor)

8. Which protocol is used to transfer files through internet ?

(HTTP, FTP, SMTP, TCP/IP)

9. In cell phone communication, a cluster consists of how many cells ?

(4, 5, 6, 7)

SY-531 2

1  9    . 1  .
(9  1 = 9)
1.       
 ?
(, ,  , )

2.       ?
(, , ,  )

3. FM ,      
.
(, , , )

4. FM      
 ?
(HF, VHF, UHF, SHF)

5.    _____   .
( ,  , , )

6.       
_______ .
(6 MHz, 7 MHz, 8 MHz, 9 MHz)

7.     ?
( , , , )

8.       ?
(HTTP, FTP, SMTP, TCP/IP)

9.         ?
(4, 5, 6, 7)

SY-531 3 P.T.O.

Answer any 7 questions from 10 to 19. Each carries 2 scores. (7  2 = 14)
10. Explain the need for regulated power supply.

11. Draw the circuit diagram of a positive clipper.

12. Draw the circuit diagram of S-R Flip-Flop.

13. Write any 2 difference between FM and AM.

14. Explain the importance of skip distance in sky wave propagation with relevant figure.

15. Data from different sources can be sent through one channel. Explain the process of
Time Division Multiplexing. (TDM)

16. List any two advantages of optical fiber communications.

17. Mention the difference between Impact printer and non-impact printer.

18. Draw the connection of computers in Ring topology.

19. Define micro cell and macro cell in mobile communications.

Answer any 7 questions from 20 to 28. Each carries 3 scores. (7  3 = 21)
20. Draw the block diagram of regulated power supply.

21. (a) Draw the circuit diagram of –ve clamper. (2)
(b) Also draw the input and output wave forms of the above circuit. (1)

22. Draw the Logic Circuit, which is used to compare two digital numbers.

SY-531 4

10  19    7  .
2  . (7  2 = 14)
10.     .

11.     .

12. S-R     .

13. FM  AM    2  .

14.      
  .

15.       .
   (TDM)   .

16.     2  .

17.        .

18.      .

19.       
 .

20  28    7  .
3  . (7  3 = 21)
20.      .

21. (a) –ve    . (2)
(b)   ,     ______. (1)

22. 2       
.

SY-531 5 P.T.O.

23. Draw the frequency spectrum of AM.

24. (a) What do you mean by quantization in Pulse Code Modulation (PCM) ? (2)
(b) Explain the need for Quantization. (1)

25. Draw the block diagram of optical Fiber Communications.

26. Explain the interlaced scanning process used in TV system.

27. Draw the basic block diagram of Computer System.

28. Write any 3 advantages of Computer Networking.

Answer any 4 questions from 29 to 33. Each carries 4 scores. (4  4 = 16)
29. (a) The output voltage of regulator IC 7805 is ______ (1)

(b) Draw the connection diagram of the above mentioned IC. (3)

30. (a) Draw the circuit diagram of an Integrator. (2)

(b) If the input is a square wave, the output of the above circuit will be ______. (2)

31. Draw the block diagram of super heterodyne receiver.

32. (a) Draw the structure of optical fiber. (2)

(b) Explain the process of total internal reflection. (2)

33. Draw the block diagram of monochrome TV receiver.

____________

SY-531 6

23. AM    .

24. (a)    (PCM)   
  ? (2)
(b)    ________. (1)

25.      .

26. TV     .

27.      .

28.    3  .

29  33    4  .
4  . (4  4 = 16)
29. (a) IC 7805    ______ . (1)
(b)   IC    . (3)

30. (a)     . (2)
(b)        
________ . (2)

31.      .

32. (a)    . (2)
(b)     . (2)

33.  TV    .

____________

SY-531 7 P.T.O.

SY-531 8

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