TN 12th Question Paper 2026 Basic Electronics Engineering

FOR TN 12TH EXAM PREPARATION

TN 12th 2026
Question Paper · Basic
Electronics
Engineering
EXAM YEAR TYPE SUBJECT

TN 12th 2026 Question Paper Basic Electronics Engineering

Notes · Sample Papers · Previous Year Papers · Mock Tests

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No. of Printed Pages : 7
9083
!9083BasicElectronicsEngg! £vÄ Gs
Register Number

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BASIC ELECTRONICS ENGINEERING

( / Tamil & English Version )

Põ» AÍÄ : 3.00 ©o ÷|µ® ] [ ö©õzu ©v¨ö£sPÒ : 90

Time Allowed : 3.00 Hours ] [ Maximum Marks : 90

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Instructions : (1) Check the question paper for fairness of printing. If there is any lack of fairness,

inform the Hall Supervisor immediately.

(2) Use Blue or Black ink to write and underline and pencil to draw diagrams.

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Note : (i) Answer all the questions.

(ii) Choose the most appropriate answer from the given four alternatives and write

the option code and the corresponding answer.

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9083 2

1. J÷µ J¸ EÒÏk ©ØÖ® öÁαøhU öPõsh J¸ Áõ°À __________.

(A) NOT (B) (C) OR (D) NOR AND

A __________ Gate has only one output and one input.

(a) NOT (b) OR (c) NOR (d) AND

2. ÁõöÚõ¼ AvºöÁs Aø»PÒ £¯oUS® ÷ÁP® __________ / ÂÚõi.
(A) «
20×10 (B)
8
« (C) « 5×10
8
15×10
8
(D) « 3×10
8

Radio frequency wave can travel __________ per second.

8 8 8 8
(a) 20×10 m (b) 5×10 m (c) 15×10 m (d) 3×10 m

3. •uÀ uPÁÀ öuõhº¦ \õuÚzøu ÷©®£kzv¯Áº ¯õº ?
(A) BÀ¤µm S÷µõì (B) \õ•÷ÁÀ GL¨.¤. ÷©õºì
(C) öíßÔa öíºmì (D) PÚi¯ß öhõÚõÀm î[Uì
Who developed the first communication machine ?

(a) Alfred Gross (b) Samuel F.B. Morse

(c) Heinrich Hertz (d) Canadian Donald Hings

4. Aø»÷£] ö\¯À£õmiÀ AvP£m\ SÔ¨¤mh EÔg_uÀ Ãu® (SAR) __________

GßÓ ÁÈPõmkuÀ AÍÂÀ uµ¨£mkÒÍx.
(A) (B)
2.6 Watts/kg (C) (D)
4.6 Watts/kg 1.6 Watts/kg 3.6 Watts/kg

The maximum Specific Absorption Rate (SAR) set as a guideline for mobile phone operation

is __________.

(a) 2.6 Watts/kg (b) 4.6 Watts/kg (c) 1.6 Watts/kg (d) 3.6 Watts/kg

5. JÎ CøÇ°ß u¢øu GÚ AøÇUP¨£k£Áº __________.

(A) \õº»ì ÷£÷£ä (B) áõß øhßhõÀ
(C) \º. ].Ã. µõ©ß (D) hõUhº |÷µ¢uº ][ P£õÛ
__________ is called as Father of fiber optics.

(a) Charles Babbage (b) John Tyndall

(c) Sir C.V. Raman (d) Dr. Narinder Singh Kapany

6. J¼ E¸ÁõÁuØSU Põµn©õP Aø©Áx
(Sound) __________.

(A) AvºÄ (B) Eµõ´Ä (C) JλPÀ (D) _ÇØ]
Sound is produced due to __________.

(a) vibration (b) friction (c) refraction (d) circulation

For more Question Papers, Sample Papers, Notes & Syllabus visit Page 2 of 7

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7. Gߣx ¦øP¨£h P¸Â ©ØÖ® EnºÂ ÷£õßÓ J¸ ‰»zv¼¸¢x
__________

J¸ £hzøu «möhkUS® ö\¯»õS®.
(A) ¤®£zøu øP¯P¨£kzxuÀ (B) ¤®£zøu ÷©®£kzxuÀ
(C) ¤®£ _¸UP® (D) ¤®£zøu «mhø©zuÀ
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__________ is the action of retrieving an image from a source such as cameras and sensor.

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(a) Image acquisition (b) Image enhancement

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(c) Image compression (d) Image restoration

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8.

g a ¤®£ ö\¯»õUP £¯ß£õmiØS £¯ß£kzu¨£kQÓx.
l©õv›
__________ ag
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(A) J뼀 (B) (\õ¯À, §›u®, Ahºzv) HSI

(C) RGB ©õv› (D) ¤µPõ\®
__________ model is used for image processing application.

(a) Luminance (b) HSI (Hue, Saturation, Intensity)

(c) RGB model (d) Radiance

JÎ CøÇUP®¤ uPÁÀ ~m£©õÚx Ai¨£øh°À ö\¯À£kQÓx.
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9. __________

(A) ªßPõ¢u Âø\ (B) ªßPõ¢uz yshÀ
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(C) £µì£µ yshÀ (D) ö©õzu EÒ¤µv£¼¨¦
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The principle of OFC technology is :

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(a)

(c)
Electromotive force

Mutual inductance
a (b)

(d)
Electromagnetic induction

Total internal reflection

10. ÷|ºvø\ ªß÷Úõmhzøu ©õÖvø\ ªß÷Úõmh©õP ©õØÖ£øÁ __________.

(A) ^µõUSuÀ (B) v¸zv
(C) ªßÚÊzu Cµmi¨¦ (D) ¦µmi
Conversion of Direct Current into Alternating Current is __________.

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(a) regulator (b) rectifier

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(c) voltage doubler (d) inverter

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GßÓ ªßÚÊzu ^µõUQ I.] &°À Pøh] Cµsk C»UP[PÒ ‘05’ Gߣx

ag __________

(A) ªßvÓøÚ
SÔUQÓx .

(B) ªß÷Úõmhzøu
(C) ªßuøhø¯ (D) ªßÚÊzuzøu
In 7805 Voltage regulator IC, the last two digits ‘05’ denote __________.

(a) power (b) current

(c) resistance (d) voltage

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9083 4

12. \õuõµn Á¯vÚ¸UPõÚ ]ìhõ¼U ©ØÖ® øh¯ìhõ¼U AÊzu[PÎß EP¢u
©v¨¦ BP C¸UP ÷Ásk®.
__________

(A) 130 ª.« Hg ©ØÖ® 90 ª.« Hg

(B) 150 ª.« Hg ©ØÖ® 110 ª.« Hg

(C) 120 ª.« Hg ©ØÖ® 80 ª.« Hg

(D) 140 ª.« Hg ©ØÖ® 100 ª.« Hg

The optimum values of systolic and diastolic pressure for an adult is __________.

(a) 130 mm Hg and 90 mm Hg

(b) 150 mm Hg and 110 mm Hg

(c) 120 mm Hg and 80 mm Hg

(d) 140 mm Hg and 100 mm Hg

13. CµzuzvÀ EÒÍ BU]áß Áµ®¤øÚ PshÔ¯ G¢u P¸Â £¯ß£kQÓx ?
(A) ìø£÷µõ«mhº (B) Cµzu AÊzu©õÛ
(C) Aø»UPõmi (D) xi¨¦ BU]«mhº
Which instrument used to measure the oxygen level in blood ?

(a) Spirometer (b) BP Monitor

(c) Oscilloscope (d) Pulse oximeter

14. PoÛ°ß £¸¨ö£õ¸Ò £õP[PÒ Gߣx __________.

(A) ALU (B) ö©ßö£õ¸Ò
(C) {øÚÁP £Sv (D) Áßö£õ¸Ò
The physical parts of a computer are called __________.

(a) ALU (b) Software

(c) Memory Unit (d) Hardware

15. £Êx}UPÀ G¨ö£õÊx® __________ •øÓ°ß ö\¯À£õhõS®.
(A) JÊ[Pø©UP¨£mh (B) •¯Ø] ©ØÖ® ¤øÇ
(C) Á›ø\ (D) ÷\õuøÚ ©ØÖ® ¤øÇ
Troubleshooting is always a process of __________ method.

(a) Organized (b) Try and Error

(c) Systematic (d) Trial and Error

For more Question Papers, Sample Papers, Notes & Syllabus visit Page 4 of 7

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£Sv & II / PART - II

SÔ¨¦ : GøÁ÷¯Ý® £zx ÂÚõUPÐUS Âøh¯ÎUPÄ®. AÁØÔÀ ÂÚõ Gs
&US Pmhõ¯©õP Âøh¯ÎUP ÷Ásk®.
28 10x3=30

Note : Answer any ten of the following questions. Question No. 28 is compulsory.
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16.

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GøÁ÷¯Ý® ‰ßÖ Cøn¢u Áõ°ÀPøÍ GÊxP.
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Write any three names of Combinational gates.

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17.
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£s÷£ØÓ®
What is Modulation ?

18. Cøµa\»õÚ ÁßÁmk ]Ö SÔ¨¦ ÁøµP.
Write short notes on Noise Hard Drive.

19. ›ÁõUP® u¸P :

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(i) FDMA (ii) TDMA (iii) SDMA

Expand :

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(i) FDMA (ii) TDMA (iii) SDMA

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JÎ CøÇUP®¤°ß wø©PÒ ¯õøÁ
What are the disadvantages of an OFC ?

21. PoÛ £µõ©›¨¦ ÁøPPÒ ¯õøÁ ?
What are the categories of Computer maintenance ?

22. IPT GßÓõÀ GßÚ ?
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What is meant by IPT ?

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23.

l as
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Define Power electronics.

25. ECG &°ß £¯ß£õkPÒ ¯õøÁ ?
What are the applications of ECG ?

[ v¸¨¦P / Turn over

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9083 6

26. ªß £õxPõ¨¦ GßÓõÀ GßÚ ? Ax Hß •UQ¯©õÚuõS® ?
What is electrical safety ? Why is it important ?

27. Cøn¯® ö\¯À£hõ©¼¸¨£uØPõÚ AÔSÔPÒ ¯õøÁ ?
What are the symptoms for internet not working ?

28. H÷uÝ® ‰ßÖ E°º ©¸zxÁ E£Pµn[PøÍ GÊxP.
Write any three bio-medical instruments.

£Sv & III / PART - III

SÔ¨¦ : GøÁ÷¯Ý® I¢x ÂÚõUPÐUS Âøh¯ÎUPÄ®. AÁØÔÀ ÂÚõ Gs
&US Pmhõ¯©õP Âøh¯ÎUP ÷Ásk®. ÷uøÁ¯õÚ Ch[PÎÀ £h[PÒ
35

ÁøµP. 5x5=25

Note : Answer any five questions. Question No. 35 is compulsory. Draw diagrams wherever

necessary.

29. ~snø»z uPÁÀ öuõhº¤ß |ßø©PÒ ©ØÖ® wø©PÒ ¯õøÁ ?
What are the advantages and disadvantages of microwave communication ?

30. Fhø» öuõÈÀ~m£zvß £¯ß£õkPÒ ¯õøÁ ?
What are the applications of Bluetooth technology ?

31. C»UP ÁøP ¤®£a ö\¯»õUPzvÀ Ai¨£øh £iPÐUPõÚ öuõSv Áøµ£hzøu
Áøµ¯Ä®.
Sketch the block diagram for fundamental steps in digital image processing.

32. J¼¯ø»°ß C¸ ÁøPPøͨ £ØÔ ÂÍUSP.
Explain the two types of Sound Waves.

33. xi¨¦ BU]áß ÁøµÂ £ØÔ ÂÍUSP.
Explain the instrumentation details of a Pulse Oximeter.

34. ö©ßö£õ¸Ò £µõ©›¨¦ ÁøPPÐÒ H÷uÝ® Cµsøh ›ÁõP GÊxP.
Write any two categories of software maintenance in detail.

35. Ãa_ ©õØÔ ÁõöÚõ¼ Hؤ°ß Pmh¨£h® ÁøµP.
Draw the block diagram of AM Radio receiver.

For more Question Papers, Sample Papers, Notes & Syllabus visit Page 6 of 7

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£Sv & IV / PART - IV

SÔ¨¦ : AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. ÷uøÁ¯õÚ Ch[PÎÀ £h®
ÁøµP. 2x10=20

Note : Answer all the questions. Draw diagrams wherever necessary.

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36. (A) H÷uÝ® I¢x uºUP Áõ°ÀPÎß ö\¯À£õmøh Áøµ¢x Esø©
e m
AmhÁøn²hß ÂÍUSP.
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(B) Aø»÷£]°ß £À÷ÁÖ uø»•øÓPøÍ Â›ÁõP J¨¤hÄ®.
(a) Draw and explain the working of any five logic gates with truth table.

OR

(b) Compare various generations of mobile phone technology in detail.

37. (A) ö£õx AÔ¨¦ Aø©¨¤ß (PA system) Pmh¨ £hzøu Áøµ¢x JÆöÁõ¸
£Svø¯²® ÂÍUSP.
AÀ»x
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(B) ULN2003A- I.] öPõsh C¯UQa _ØÔß £h® ÁøµP.
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(a)

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Draw the block diagram of PA system and explain each block.

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(b)
a
Draw the circuit diagram of switching circuit using ULN2003A-IC.

- o O o -

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