TN 11th Question Paper 2023 Basic Electrical Engineering

Tamil Nadu
State Board

2023
QUESTION
PAPER

No. of Printed Pages : 8
6782
!6782IstYearBasicElectricalEngineering! £vÄ Gs
Register Number

Part III — Vocational Subjects

Ai¨£øh ªß ö£õÔ°¯À & P¸zv¯À
BASIC ELECTRICAL ENGINEERING - THEORY
( uªÌ ©ØÖ® B[Q» ÁÈ / Tamil & English Version )

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

AÔÄøµPÒ : (1) AøÚzx ÂÚõUPЮ \›¯õP £vÁõQ EÒÍuõ GߣuøÚ \›£õºzxU
öPõÒÍÄ®. Aa_¨£v¨¤À SøÓ°¸¨¤ß AøÓU PsPõo¨£õÍ›h®
EhÚi¯õPz öu›ÂUPÄ®.
(2) }»® AÀ»x P¸¨¦ ø©°øÚ ©mk÷© GÊxÁuØS®
AiU÷PõikÁuØS® £¯ß£kzu ÷Ásk®. £h[PÒ ÁøµÁuØS
ö£ß]À £¯ß£kzuÄ®.
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.

£Sv & I / PART – I

SÔ¨¦ : (i) AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 15x1=15

(ii) öPõkUP¨£mkÒÍ ©õØÖ ÂøhPÎÀ ªPÄ® Hئøh¯ Âøhø¯z
÷uº¢öukzxU SÔ±mkhß Âøh°øÚ²® ÷\ºzx GÊuÄ®.
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.

[ v¸¨¦P / Turn over

6782 2

1. Âø\°ß A»S __________.
(A) ÷ÁõÀm (B) {³mhß (C) áüÀ (D) B®¤¯º
Unit of force is __________.

(a) Volt (b) Newton (c) Joule (d) Ampere

2. J¸ ªß ÂÍUQß ªßuøh 10 Ω. Auß ÁÈ÷¯ 2 A ªß÷Úõmh® £õ´¢uõÀ
A¢u ªß ÂÍUQß ªßÚÊzu® GÆÁÍÄ ?
(A) 20 ÷ÁõÀm (B) 110 ÷ÁõÀm (C) 22 ÷ÁõÀm (D) 220 ÷ÁõÀm
The resistance of a lamp is 10 Ω and 2 A current is flowing through it. What is
the voltage of the lamp ?

(a) 20 Volt (b) 110 Volt (c) 22 Volt (d) 220 Volt

3. ©Ûu Eh¼À Dµ® CÀ»õu÷£õx ªßuøh ©v¨¦ ÷uõµõ¯©õP __________.
(A) 10 Q÷»õ K® (B) 80 Q÷»õ K® (C) 20 Q÷»õ K® (D) 40 Q÷»õ K®
Without sweating of human body, the resistance is approximately :

(a) 10 kΩ (b) 80 kΩ (c) 20 kΩ (d) 40 kΩ

4. }µõÀ {µ¨£¨£mh wzuk¨£õß öPõsk GÆÁøP w Pmk¨£kzu¨£kQÓx ?
(A) vµÁ AÊzu Áõ² \õº¢u w
(B) Gsön´ ©ØÖ® vµÁ® \õº¢u w
(C) E÷»õP® ©ØÖ® ªß \õuÚ[PÒ \õº¢u w
(D) ©µ®, PõQu® ©ØÖ® xoPÒ \õº¢u w
Which type of fire is controlled with water filled extinguisher ?

(a) Fire caused by liquified petroleum gas.

(b) Fire caused by oil and liquid fuels.

(c) Fire caused by metals and electrical appliances.

(d) Fire caused by paper, wood and cloth.

3 6782

5. L¤Í®ª[Qß ChUøP Âv¨£i Pmøh µÀ __________ I SÔUS®.
(A) Phzv |P¸® vø\
(B) E¸ÁõUP¨£mh ªß÷Úõmhzvß vø\
(C) E¸ÁõUP¨£mh ªßÚÊzuzvß vø\
(D) Põ¢u¨¦»zvß vø\
In Fleming’s left hand rule, thumb represents __________.
(a) direction of motion of the conductor
(b) direction of generated current
(c) direction of generated voltage
(d) direction of magnetic field

6. E»º ÁøP ªßP»zvÀ Põº£ß usk __________ ªßÁõ´ BS®.
(A) {ø» (B) ÷|º (C) {³mµÀ (D) Gvº
In dry cell, carbon rod is __________ electrode.
(a) phase (b) positive (c) neutral (d) negative

7. ªßuøh ©mk® öPõsh ªß_ØÔÀ vÓß Põµo :
(A) Cµsk (B) ³Ûmi
(C) JßÖUS SøÓÄ (D) |õßS
The value of the power factor of pure resistive circuit is :
(a) 2 (b) Unity
(c) Less than one (d) 4

8. J¸ øh÷¯õk uø»RÌ \õº¦øh¯uõP C¸US®÷£õx, Ax J¸ __________ BP
ö\¯À£kQÓx.
(A) \õº¦ (B) ªßPhzv
(C) SøÓ Phzv (D) ªß Phzuõ Põ¨¦¨ö£õ¸Ò
When a diode is reverse-biased, it acts as :
(a) Biasing (b) Conductor

(c) Semi-conductor (d) Insulator

[ v¸¨¦P / Turn over

6782 4

9. vÓ¢u _ØÖ ö\´Áuß •UQ¯ ÷|õUP® :
(A) îìh›]ì CǨø£U PshÔÁx
(B) Gi ªß\õµ CǨø£U PshÔÁx
(C) ö\®¦ CǨø£U PshÔÁx
(D) EÒÍP CǨø£U PshÔÁx
The purpose of conducting Open Circuit (OC) test is to determine :
(a) Hysteresis loss
(b) Eddy current loss
(c) Copper loss
(d) Core loss

10. }µõ ªß ÷u´¨¦¨ ö£mi°À GÆÁøP uspøµ £¯ß£kzu ÷Ásk® ?
(A) Sκ¢u }º (B) \õuõµn uspº
(C) y´ø©¯õÚ ÁiPmi¯ }º (D) öÁ¢}º
What type of water can be used in steam iron box ?
(a) Cold water (b) Ordinary water
(c) Pure distilled water (d) Hot water

11. ø©U÷µõ÷ÁÆ KÁÛÀ E¯º ªßÚÊzuzv¼¸¢x £õxPõUS® E£Pµn® Gx ?
(A) E¯º ªßÚÊzu øh÷¯õk (B) ÷©UÚmµõß
(C) ø©U÷µõ Psm÷µõ»º (D) E¯º ªßÚÊzu ªß©õØÔ
Which component is used to protect from high voltage in microwave oven ?
(a) High voltage diode (b) Magnetron
(c) Micro controller (d) High voltage transformer

12. ÷©ø\ ªß Â]Ô°À £¯ß£kzu¨£k® ªßÛ¯[Q Gx ?
(A) {Ǽmh Põ¢u •øÚ yshÀ ªß C¯[Q
(B) {ø»¯õÚ ªß÷Úؤ yshÀ ªß C¯[Q
(C) •Êø© C¯[Q
(D) ªß÷Úؤ xÁUP ©ØÖ® C¯[S® ªß C¯[Q
Which type of motor is used in table fan ?
(a) Shaded pole motor.
(b) Permanent capacitor induction motor.

(c) Universal motor.
(d) Capacitor start and capacitor run induction motor.

5 6782

13. usp›À C¸US® ö£›¯ ©øÓ¢xÒÍ xPÒPÒ __________ AkUQÀ ÁiPmh¨&
£kQÓx.
(A) AÀmµõ L¤Ài÷µåß (B) ¦Ó Fuõ
(C) ö\¯À£kzu¨£mh Põº£ß (D) uø»RÌ \ÆÅk £µÁÀ
Large suspended particles present in water is filtered in __________ layer.

(a) ultra filtration (b) ultraviolet

(c) activation carbon (d) reverse osmosis

14. TÌ öPõÒP»ß __________ ö£õ¸ÍõÀ BÚx.
(A) A¾ªÛ¯® (B) Cµ¨£º
(C) x¸¨¤iUPõu GLS (D) uõªµ®
The pulp container is made of __________.

(a) Aluminium (b) Rubber

(c) Stainless steel (d) Copper

15. RÌUPshÁØÔÀ P»¨¤Ú ªß\õµ ÁõPÚ[PÒ Gøu öPõskÒÍx ?
(A) C¯ØøP G›Áõ² ÁõPÚ C¯¢vµ® ©ØÖ® ªß÷Úõi
(B) EÒ G› C¯¢vµ® ©ØÖ® ªß÷Úõi
(C) ö£m÷µõÀ C¯¢vµ® ©ØÖ® ªß÷Úõi
(D) Cµsk ªß÷ÚõiPÒ
The hybrid electrical vehicles consists of :

(a) Natural gas vehicle engine and electric motor

(b) Internal combustion engine and electric motor

(c) Petrol engine and electrical motor

(d) Two electric motors

[ v¸¨¦P / Turn over

6782 6

£Sv & II / PART - II
SÔ¨¦ : GøÁ÷¯Ý® £zx ÂÚõUPÐUS _¸UP©õP Âøh¯ÎUPÄ®. AÁØÔÀ
ÂÚõ Gs 28 &US Pmhõ¯® Âøh¯ÎzuÀ ÷Ásk®. 10x3=30
Note : Answer any ten questions briefly. Question No. 28 is Compulsory.

16. ªßPhzv GßÓõÀ GßÚ ?
What is a conductor ?

17. ªß E¸S CøÇ – Áøµ¯ÖUPÄ®.
Define Fuse.

18. »õöµsmì Âvø¯U TÖP.
State Lorentz’s law.

19. u[QUöPõsh Põ¢u \Uv GßÓõÀ GßÚ ?
What is meant by residual magnetism ?

20. ¼zv¯® A¯Û ªßP»® GßÓõÀ GßÚ ?
What is called a Lithium - ion battery ?

21. IC &°ß |ßø©PøÍ GÊxP.
Write down the advantages of IC.

22. P¸ÂPÐUPõÚ ªß©õØÔ°ß ÁøPPøÍ GÊxP.
Write down the types of instrument transformer.

23. Gi ªß\õµ CǨ¦ £ØÔ ]Ö SÔ¨¦ u¸P.
Write short notes on Eddy current loss.

24. yshÀ Ak¨¤ß £¯ßPÒ ¯õøÁ ?

What are the uses of induction stove ?

7 6782

25. ø©¯Â»US }÷µØÔ°À uspº QmizuÀ GßÓõÀ GßÚ ?
What is priming in centrifugal pump ?

26. <Dµ AµøÁ C¯¢vµzvß ÁøPPøÍU TÖP.
List out the components of wet grinder.

27. ªß\õµ ÁõPÚ[PÎß ÁøPPøͨ £mi¯¼kP.
List out the types of electric vehicles.

28. ªß÷Úõi°ß RPM GßÓõÀ GßÚ ?
What is RPM of motor ?

£Sv & III / PART - III
SÔ¨¦ : GøÁ÷¯Ý® I¢x ÂÚõUPÐUS ©mk® Âøh¯ÎUPÄ®. AÁØÔÀ ÂÚõ
Gs 35 &US Pmhõ¯©õP Âøh¯ÎUPÄ®. 5x5=25
Note : Answer any five questions. Question No. 35 is Compulsory.

29. ªÛ÷¯a\º \ºU³m ¤÷µUPº £ØÔ ÂÁ›UPÄ®.
Explain miniature circuit breaker.

30. •ußø© ©ØÖ® xøn ªßP»zvØS Cøh÷¯²ÒÍ ÷ÁÖ£õkPøÍ AmhÁøn¨&
£kzxP.
Tabulate the differences between primary and secondary cell.

31. ìhõº Cøn¨¦ •øÓ°ß |ßø©PÒ ¯õøÁ ?
What are the advantages of star connection system ?

32. AÊzu ÁøP }º `÷hØÖ® P»ß £ØÔ ÂÍUSP.
Explain the pressure type geyser.

33. \õÖ ¤È P¸Â°ß £õP[PøÍ ÂÁ›UPÄ®.
Explain the components of an electric juicer.

34. ªß\õµ ÁõPÚzvß BØÓÀ ÷©»õsø© Aø©¨ø£ ÂÍUSP.
Explain the energy management system of an electric vehicle.

ªß_ØÖPÎß ÁøPPøÍ £hzxhß ÂÁ›UPÄ®.

35.
Explain the types of electric circuit with neat diagram.

[ v¸¨¦P / Turn over

6782 8

£Sv & IV / PART - IV
SÔ¨¦ : AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. ÷uøÁ¯õÚ Ch[PÎÀ £h®
ÁøµP. 2x10=20
Note : Answer all the following questions. Draw diagrams wherever necessary.

36. (A) ›÷» GßÓõÀ GßÚ ? Auß ÁøPPøÍ ÂÁ›UPÄ®.
AÀ»x
(B) ©õÖvø\ ªß\õµzvß |ßø©PÒ ©ØÖ® SøÓ£õkPÒ £ØÔ ÂÁ›UPÄ®.
(a) What is meant by relay ? Explain the types of relays.
OR
(b) Explain the advantages and disadvantages of AC supply.

37. (A) ªß©õØÔ°ß EMF \©ß£õmøhz u¸Â.
AÀ»x
(B) ø©U÷µõ÷ÁÆ KÁß ÁøPPÒ ©ØÖ® ö\¯À£k® Âu® BQ¯ÁØøÓ
£hzxhß ÂÍUSP.
(a) Derive the EMF equation of a transformer.
OR
(b) Explain types of microwave oven and its working principle with neat diagram.

-oOo-