TN 11th Question Paper 2022 Basic Electrical Engineering

No. of Printed Pages : 8
6082
!6082IstYearBasicElectricalEngineering! £vÄ Gs
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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.

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1. AøÚz-x¨ ö£õ-¸Ò-P-Î-¾® Ah[-Q¯ ªPa ]Ô¯ xPÒ.
(A) {³U-Î-¯ì (B) Aq (C) G»Um-µõß (D) ‰»U-T-Ö
The smallest particle of an element is known as :
(a) nucleus (b) atom (c) electron (d) molecule

2. Ãmk ªß Cøn¨-¦U-PõÚ ªß-Ú-Êz-u® :
(A) 220 - 230 V (B) 110 - 120 V
(C) 230 - 440 V (D) 120 - 130 V
The supply voltage used for domestic purpose is :
(a) 220 - 230 V (b) 110 - 120 V
(c) 230 - 440 V (d) 120 - 130 V

3. 1HP Gß-£-uß ©v¨¦ :

(A) 900 W (B) 1000 W (C) 746 W (D) 750 W
The value of 1HP is :
(a) 900 W (b) 1000 W (c) 746 W (d) 750 W

4. RÌU-Ps-h-ÁØ-ÖÒ Gx ªß Põ¢-u¨-¦-»z-vÀ BØ-Ó-ø»a ÷\ªzx øÁU-Q-Ó-x ?
(A) ªß-u-øh (B) ªß-÷uU-Q
(C) ©õØ-Ô-¯-ø©U-S® ªß-u-øh (D) CÚz-uøh
Which of the following circuit elements, stores energy in an electromagnetic field ?
(a) Resistance (b) Capacitor
(c) Variable Resistance (d) Inductance

5. Põ¢-uU- ÷Põ-k-P-Îß Ahºz-v-°ß A»-S __________.
(A) öhì-»õ (B) öÁ£º/-«2 (C) öÁ£º (D) ¿©ßì
The unit of magnetic flux density is __________.
Weber/m2

(a) Tesla (b) (c) Weber (d) Lumens

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6. xøn ªß-P-»z-vÀ ªß-÷ÚØ-Ó® ©Ø-Ö® ªß-Û-ÓU-P® G¢u Âv-°ß Ai¨-£-øh-
°À {PÌ-Q-Óx ?
(A) ö»ßì Âv (B) Kªß Âv
(C) ªß-÷Úõmh Âv (D) L£õ-µ-÷h-°ß ªß-ÚõØ £S¨¦ Âv-PÒ
By which law charging and discharging process in secondary cell is done ?
(a) Lenz’s Law (b) Ohm’s Law
(c) Current Law (d) Faraday’s Law of electrolysis

7. Aø»-Ä ÷ÁPz-vß A»-S :
(A) ø\U-QÒ (B) öíßÔ (C) B®-¤-¯º (D) öíºmì
The unit of frequency is :
(a) Cycle (b) Henry (c) Ampere (d) Hertz

8. ‰ßÖ {ø» \¨-øÍ-°À {ø» ÷ÁÖ-£õk Gß-£x :
(A) 120E (B) 90E (C) 360E (D) 180E
In three phase, phase difference is :
(a) 120E (b) 90E (c) 360E (d) 180E

9. ªß-©õØÔ Gß-£øu __________ BPU P¸-u-»õ®.
(A) {ø»-¯õÚ ªß \õ-u-Ú® (B) _-Ç-¾® \õ-u-Ú®
(C) C¯¢-v-µ-Â-¯À \õ-u-Ú® (D) ªß-Ú-q-Â-¯À \õ-u-Ú®
The transformer may be represented as :
(a) static device (b) rotating device
(c) mechanical device (d) electronic device

10. ÷|º-vø\ ªß-÷Úõi __________ uz-x-Áz-vß Ai¨-£-øh-°À ö\¯À-£-k-Q-Ó-x.
(A) L£õ-µ-÷h-°ß Âv-PÒ (B) ¤Í-ª[-Qß ChUøP Âv
(C) Kªß Âv (D) ¤Í-ª[-Qß Á»UøP Âv
The principle D.C. Motor is based on :
(a) Faraday’s law (b) Fleming’s Left-hand rule
(c) Ohm’s law (d) Fleming’s Right-hand rule

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11. SøÓ-ÁõÚ Âm-h-•® Av-P }Í-•® Eøh¯ ©õ-Ö-vø\ ªß-ÚõUQ :
(A) ÷|ºz-vø\ ªß-ÚõU-Q (B) ÷\¼-¯sm x¸-Á ÁøP
(C) ©õ-Ö-vø\ ªß-ÚõU-Q (D) hº-÷£õ ÁøP
The size of stator of an alternator is small in diameter and large in axial length is
called :
(a) DC generator (b) Salient-pole type alternator
(c) AC generator (d) Turbo alternators

12. C¢-v-¯õ-ÂÀ EØ-£zv ö\´-¯¨-£-k® ªß \¨-øÍ-°ß Aø»Ä ÷ÁP® :
(A) 60 Hz (B) 25 Hz (C) 40 Hz (D) 50 Hz
In India, the generated frequency of the power supply is :
(a) 60 Hz (b) 25 Hz (c) 40 Hz (d) 50 Hz

13. ©õ-Ö-•-øÓ¨ £Ð-Âß Põ-µ-n-©õP ö£õ-¸-Îß uõ[S \Uv SøÓ-Á-x __________
GÚ¨-£-k®.
(A) ö|õ¢u Pøͨ-¦ (B) uß-ø©-°-Çz-uÀ
(C) }m-]z-uß-ø© (D) ö|õ-Ö[-S® uß-ø©
Failure of materials under repeated stress is called _________.
(a) Fatigue (b) Creep
(c) Ductility (d) Brittleness

14. \õ- u õ- µ n AøÓ öÁ¨- £ - { - ø »- ° À ]» Cøn- v - Ó ß G»Um- µ õß- P Ò Cøn- v - Ó ß
£õ-øuø¯ Âmk öÁÎ-÷¯-Ö-Á-x __________ GÚ¨-£-k®.
(A) Aq Aø©¨¦ (B) Pm-kÓõ G»Um-µõß-PÒ
(C) G»Um-µõß öÁÎ-±-k (D) G»Um-µõß BØ-ÓÀ
At ordinary temperature some of the valance electrons may get detached is called
__________.
(a) Atomic Structure (b) Free electrons
(c) Electron Emission (d) Electron Energy

5 6082

15. P&ÁøP SøÓ-P-hzv E¸-ÁõP ÷\ºU-P¨-£-k® uÛ-©® :

(A) A¾-ª-Û-¯® (B) ]¼U-Põß
(C) ÷P¼-¯® (D) öáº-÷©-Û-¯®
P-type semiconductor is formed by adding :
(a) Aluminium (b) Silicon
(c) Gallium (d) Germanium

£Sv & II / PART - II
SÔ¨¦ : GøÁ÷¯Ý® £z-x ÂÚõUPÐUS _¸U-P-©õ-P Âøh¯ÎUPÄ®. AÁØ-ÔÀ
ÂÚõ Gs 28 &US Pmhõ¯® Âøh¯ÎzuÀ ÷Ás-k®. 10x3=30

Note : Answer any ten questions briefly question no. 28 is compulsory.

16. uõÌ-Á-Êzu ©Ø-Ö® E¯º-Á-Êzu ªß-\¨øÍ ø»ß – Áøµ-¯-ÖU-P-Ä®.
Define L.T. Line and H.T. Line voltage.

17. ªß-Û-¯US Âø\ ©Ø-Ö® ªß-Ú-Êzu ÷ÁÖ-£õm-iØS Cøh-÷¯-²ÒÍ ÷ÁÖ-£õ-k-PÒ
GøÁ-÷¯-Ý® ‰ß-ÔøÚ GÊ-x-P.
Tabulate any three differences between Electromotive force and Potential
difference.

18. îì-h-›-]ì CǨ¦ Gß-ÓõÀ GßÚ ?
What is hysteresis loss ?

19. ¤›U-S® uP-k Gß-ÓõÀ GßÚ ?
What are Separators ?

20. Põ-Ÿ¯ Aª» ªß-P-»® GßÓõÀ GßÚ ?
What is a Lead Acid Cell battery ?

6082 6

21. \µõ-\› ©v¨¦ £ØÔ ]Ö SÔ¨¦ GÊ-x-P.
Write short notes on average value.

22. ªß ©õØ-Ô-°ß |ß-ø©-PÒ ¯õøÁ ?
What are the advantages of Transformer ?

23. Gvº ªß-Û-¯US Âø\ Gß-ÓõÀ GßÚ ? Auß `z-v-µzøu GÊ-x-P.
What is meant by Back EMF ? Give its formula.

24. ©õ-Ö-vø\ ªß-\õ-µ® EØ-£zv ö\´-Á-uß |ß-ø©-PÒ ¯õøÁ ?
What are the advantages of AC generator ?

25. £i-{ø» ªß-÷Úõ-i-°ß |ß-ø©-PÒ ©Ø-Ö® SøÓ-PÒ ¯õøÁ ?
What are the advantages and disadvantages of stepper motor ?

26. ÷|ºz-vø\ ªß-ÚõU-Q-°ß ÷Áø» ¯õx ?
What is the work of DC generator ?

27. Cøn-v-Óß BØ-ÓÀ-£møh Gß-ÓõÀ GßÚ ?
What is called Valance Band ?

28. SÔ¨¦ GÊ-x-P :
(i) ö£õÔ-°¯À ö£õ-¸m-P-Îß uõ[S \U-v
(ii) ÂøÓ¨-¦z ußø©
(iii) «m-]z uß-ø©
Write note on :
(i) Strength of a Engineering material
(ii) Stiffness
(iii) Elasticity

7 6082

£Sv & III / PART - III
SÔ¨¦ : GøÁ÷¯Ý® I¢-x ÂÚõUPÐUS ©m-k® Âøh¯ÎUPÄ®. AÁØ-ÔÀ ÂÚõ
Gs 35 &US Pmhõ¯©õP Âøh¯ÎUPÄ®. 5x5=25

Note : Answer any five questions. Question No. 35 is Compulsory.

29. ªß Avºa-]ø¯ ukU-S® •øÓ-PøÍ ÂÁ-›U-P-Ä®.
Explain the method of preventing an electric shock.

30. 1000 W ªß-v-Óß öPõsh J¸ ªß-_Ø-Ôß ªß-Ú-Êz-u® 240 V GÛÀ, A®-ªß–
_Ø-Ôß ªß-÷Úõm-hz-øuU Põs-P.
An electrical circuit has 1000 W power and the value of voltage is 240 V. Find the
value of current flowing through it.

31. J¨-¥mk Fk-¸-Ä® vÓß, Põ¢u C¯US Âø\, Põ¢-uz-uøh – `z-v-µ[-P-Ð-hß
Áøµ-¯-ÖU-P-Ä®.
Define relative permeability, MMF, and Reluctance with its formula.

32. J¸ {ø» \¨-øÍø¯ Âh ‰ßÖ {ø» \¨øÍ £¯ß-£-kz-x-Á-uØ-PõÚ Põ-µ-n[-PÒ
¯õøÁ ?
Explain the reasons for the use of three phase system over single phase system.

33. ÷|ºz-vø\ ªß-ÚõU-Q-°ß £¯ß-PøÍ ÂÁ-›U-P-Ä®.
Explain the application of DC generators.

34. SøÓ Phz-v-¯õ-Úx •ß-÷ÚõU-Sa \õº¦ {ø»-°À ö\¯À-£-k-uø» ÂÁ-›U-P-Ä®.
Explain forward biasing of semiconductor.

35. ªß-©õØ-Ô-°À £õ-x-Põ¨-¦a \õ-u-Ú[-PøÍ _¸U-P-©õP GÊ-x-P.
(A) ¤
- Ÿ- z-uº (-B) -£õ-x-Põ¨¦ öÁi¨¦ ÁÈ
Write short notes on the following protective devices of Transformer.
(a) Breather (b) Explosion Vent

6082 8

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

36. (A) ¼z-v-¯® A¯-Û ªß-P-»® £Ø-Ô¨ £hz-x-hß Â›-ÁõP GÊ-x-P.
AÀ»x
(B) Cøn ªß-_Ø-Ôß Aø©¨¦ ©Ø-Ö® ÷Áø» ö\´-²® Âuz-øu¨ £hz-x-hß
ÂÁ-›U-P-Ä®.
(a) Explain in detail about Lithium ion battery with diagram.
OR
(b) Explain the construction and working of parallel circuit with neat sketch.

37. (A) ªß-©õØÔ ö\¯À-£-k® Âuz-øu¨ £hz-x-hß ÂÁ-›U-P-Ä®.
AÀ»x
(B) ²Û-Áº-\À ªß-÷Úõ-iø¯ £h® Áøµ¢x ÂÁ-›U-P-Ä®.
(a) Explain the working principle of a Transformer with diagram.
OR
(b) Explain with neat sketch about universal motor.

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