TN 11th Question Paper 2024 Basic Electrical Engineering

TN PUBLIC EXAM

QUESTION
PAPER
2024

No. of Printed Pages : 8
7682
!7682IstYearBasicElectricalEngineering! £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¨£mh |õßS ©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

7682 2

1. ©Ûu Eh¼À Dµ® EÒÍ÷£õx ªßuøh ©v¨¦ ÷uõµõ¯©õP __________.
(A) 1 Q÷»õ K® (B) 80 Q÷»õ K®
(C) 10 Q÷»õ K® (-D) 40 Q÷»õ K®
With sweating of human body, the resistance is approximately __________.
(a) 1 kΩ (b) 80 kΩ
(c) 10 kΩ (d) 40 kΩ

2. ªßP»zvÀ £¯ß£kzu¨£k® ¤›US® uPk __________ öPõshx.
(A) SøÓÁõP Phzx® ußø© (B) Phzx® ußø©
(C) AvP©õP Phzx® ußø© (-D) Phzuõu ußø©
Separators in a battery is of __________ material.
(a) partly conductive (b) conductive
(c) heavy conductive (d) non-conductive

3. Põ¢u ÷PõkPÒ Ahºzv°ß A»S __________.
(A) öhì»õ (B) öÁ£º/«2 (C) öÁ£º (-D) ¿©ß
The unit of magnetic flux density is __________.
(a) Tesla (b) Weber/m2 (c) Weber (d) Lumen

4. \õuõµn ÁøP ªß ÷u´¨¦¨ ö£mi°À EÒÍ öÁ¨£U P®¤a _¸Ò G¢u
E÷»õPzuõÀ BÚx ?
(A) A¾ªÛ¯® (B) ¤zuøÚ (C) ö\®¦ (-D) ø|U÷µõ®
In which metal, the heating element of ordinary type iron box is made up of ?
(a) Aluminium (b) Brass (c) Copper (d) Nichrome

5. öÁ¢}º u¸® \õuÚzvß EÒ£õzvµ® x¸¨¤iUPõ©À C¸UP __________ §a_
§\¨£kQÓx.
(A) {UPÀ (B) D¯® (C) uõªµ® (-D) S÷µõª¯®
To avoid corrosion in an inner container of geyser __________ coating is used.
(a) Nickel (b) Lead (c) Copper (d) Chromium

3 7682

6. ]¼UPõß ìjÀ uPkPÒ £¯ß£kzu¨£kÁuõÀ SøÓÁx __________.
(A) îìh›]ì CǨ¦ (B) Eµõ´ÂÚõÀ HØ£k® CǨ¦
(C) Gi ªß\õµ CǨ¦ (-D) C¯¢vµÂ¯À CǨ¦
Silicon steel sheets are used to reduce the :
(a) Hysteresis loss (b) Frictional loss
(c) Eddy current loss (d) Mechanical loss

7. ªßuøh ©mk® öPõsh ªß_ØÔÀ vÓß Põµo°ß ©v¨¦ :
(A) SøÓ¨¦ (B) ³Ûmi
(C) JßÖUS SøÓÁõP (-D) AvP›¨¦
Power factor of pure resistive circuit is :
(a) lagging (b) unity
(c) less than one (d) leading

8. ì÷hsm ø£ ö£º÷µõ h¦Ò UPS &ß uµ® __________.
(A) 3.0 •uÀ 15 KVA (B) 0.5 •uÀ 3 KVA
(C) 5.0 •uÀ 5000 KVA (-D) 0.5 •uÀ 5 KVA
The range of standby ferro double UPS is :
(a) 3.0 to 15 KVA (b) 0.5 to 3 KVA
(c) 5.0 to 5000 KVA (d) 0.5 to 5 KVA

9. Aø»Ä ÷ÁPzvß A»S __________.
(A) ø\UQÒ (B) öíßÔ (C) B®¤¯º (-D) öíºmì
The unit of frequency is __________.
(a) Cycle (b) Henry (c) Ampere (d) Hertz

10. ªß÷Úõmhzøu Phzuõu ö£õ¸Ò Gx ?
(A) öÁÒÎ (B) u[P® (C) ö\®¦ (-D) Psnõi
The material that does not conduct current is :
(a) Silver (b) Gold (c) Copper (d) Glass

[ v¸¨¦P / Turn over

7682 4

11. K® Âv£i ªßÚÊzuzvß ©v¨¦ __________.

(A) IR (B) V R (C) I2R (-D) V
I

According to Ohm’s law the value of voltage is __________.

(a) IR (b) V (c) I2R (d) V
R I

12. Põ¢u¨ ¦»zuõÀ »UP¨£k® ö£õ¸mPÒ __________.
(A) h¯õ Põ¢u¨ ö£õ¸mPÒ (B) Lö£º÷µõ Põ¢u¨ ö£õ¸mPÒ
(C) Phzx® ö£õ¸mPÒ (-D) £õµõ Põ¢u¨ ö£õ¸mPÒ
A material which is slightly repelled by magnetic field is known as :

(a) Diamagnetic material (b) Ferromagnetic material

(c) Conducting material (d) Paramagnetic material

13. ªß\õµ ÁõPÚzvØS Ãmk ªß\õµzvÀ GzuøÚ \uÃu® ªß÷ÚØÓ®
ö\´¯»õ® ?
(A) 80% (B) 50% (C) 90% (-D) 75%
What percentage of charging of electrical vehicle can be done at home ?

(a) 80% (b) 50% (c) 90% (d) 75%

14. ø©¯Â»US }÷µØÔ°À ø©¯Â»US Âø\ø¯ E¸ÁõUP EuÄ® £Sv Gx ?
(A) _ÇØusk (B) _¸Ò ÁiÁ EøÓ
(C) x¸zv (-D) Aøh¨¦ ö£mi
Which part is used to produce centrifugal force in centrifugal pump ?

(a) Shaft (b) Scroll cover

(c) Impeller (d) Blocking box

5 7682

15. ø©¯Â»US ÁøP \õÖ ¤È²® P¸Â°ß ÷ÁP® GÆÁÍÄ ?
(A) 5000 rpm •uÀ 7000 rpm Áøµ
(B) 3000 rpm •uÀ 5000 rpm Áøµ
(C) 7000 rpm •uÀ 9000 rpm Áøµ
(-D) 6000 rpm •uÀ 14000 rpm Áøµ
What is the speed of centrifugal type juicer ?
(a) 5000 rpm to 7000 rpm
(b) 3000 rpm to 5000 rpm
(c) 7000 rpm to 9000 rpm
(d) 6000 rpm to 14000 rpm

£Sv & II / PART - II

SÔ¨¦ : GøÁ÷¯Ý® £zx ÂÚõU-P-ÐUS _¸UP©õP Âøh-¯-ÎU-P-Ä®. AÁØÔÀ
ÂÚõ Gs 28 &US Pm-hõ-¯-® Âøh-¯-ÎzuÀ ÷Ásk®. 10x3=30
Note : Answer any ten questions briefly. Question No. 28 is Compulsory.

16. •ußø© ªßP»® £ØÔ GÊxP.
Write about the primary cell.

17. ªß©õØÔ°ß ÂøÚzvÓß £ØÔ GÊxP.
Write about efficiency of a transformer.

18. J¸ ªß_ØÔÀ ªßÚÊzu® 240 V ©ØÖ® 12 A ªß÷Úõmh® Auß ÁȯõP
£õ´QÓx GÛÀ ªß_ØÔß ªßuøh ©v¨ø£U PõsP.
Voltage of the circuit is 240 V and current 12 A is flowing through it. Find the value of
resistance.

19. _ØÖa`ÇÀ ©õ_£õmiß ÁøPPøÍ Á›ø\¨£kzxP.
List out the types of environmental pollution.

[ v¸¨¦P / Turn over

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20. PõŸ¯ Aª» ªßP»zvÀ ªßÛÓUP® ö\´²®÷£õx HØ£k® Cµ\õ¯Ú ©õØÓ[PÒ
¯õøÁ ?
What are the chemical changes during discharging in lead acid battery ?

21. ö\¯¼À EÒÍ TÖPøÍ Áøµ¯ÖUPÄ®.
Define active components.

22. ªß\õµ ÁõPÚ® GßÓõÀ GßÚ ?
What is called an electric vehicle ?

23. ªß Â]Ô°ß ÁøPPÒ ¯õøÁ ?
What are the types of fan ?

24. PõL¤ ö£ºöPõ÷»mhº GßÓõÀ GßÚ ?
What is Coffee Percolator ?

25. SøÓUS® ÁøP ªß©õØÔ GßÓõÀ GßÚ ?
What is meant by step down transformer ?

26. }º _zvP›¨¦ £ØÔ ]Ö SÔ¨¦ GÊxP.
Write short note about water purifier.

27. ªßPõ¢u® GßÓõÀ GßÚ ?
What is called an electromagnet ?

28. vh {ø» ›÷» GßÓõÀ GßÚ ?
What is called solid state relay ?

7 7682

£Sv & III / PART - III

SÔ¨¦ : GøÁ÷¯Ý® I¢x ÂÚõU-P-ÐUS ©mk® Âøh-¯-ÎU-P-Ä®. AÁØÔÀ ÂÚõ
Gs 35 &US Pm-hõ-¯-©õP Âøh-¯-ÎU-P-Ä®. 5x5=25

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

29. öÁÎ÷¯ØÖ® ªßÂ]Ô GßÓõÀ GßÚ ? Ax C¯[S® Âu® ©ØÖ®
E£÷¯õP[PøÍ ÂÍUSP.
What is exhaust fan ? Explain its working principle and uses.

30. IC &ß |ßø©PÒ ©ØÖ® wø©PøÍ AmhÁøn¨£kzxP.
Tabulate the advantages and disadvantages of IC.

31. ªß Avºa]ø¯ ukUS® •øÓø¯ ÂÍUSP.
Explain the method of preventing an electric shock.

32. ªß\õµ ÁõPÚ[PÎß Pmk¨£kzvø¯ ÂÍUSP.
Explain controller of electric vehicles.

33. PõŸ¯ Aª» ©ØÖ® ¼zv¯® A¯Û ªßP»zvØS® Cøh÷¯ EÒÍ HÊ
÷ÁÖ£õkPøÍ GÊxP.
Write seven features about the disparity between a lead acid and a lithium ion battery.

34. ø©U÷µõ÷ÁÆ KÁÛß |ßø©PÒ ©ØÖ® wø©PøÍ ÂÍUSP.
Explain advantages and disadvantages of microwave oven.

35. SÔ¨¦ u¸P :
(A) Pß\º÷Ámhº
(B) ¤Ÿzuº
Write short notes on :
(a) Conservator
(b) Breather

[ v¸¨¦P / Turn over

7682 8

£Sv & IV / PART - IV
SÔ¨¦ : AøÚz-x ÂÚõU-P-ÐU-S® Âøh-¯-ÎU-P-Ä®. ÷uøÁ¯õÚ Ch[PÎÀ £h®
ÁøµP. 2x10=20
Note : Answer all the following questions. Draw diagrams wherever necessary.

36. (A) Qº\õL¨ ÂvPøÍ £hzxhß ÂÍUSP.
AÀ-»-x
(B) Põ¢u u¯UP ÁøͯzvøÚ¨ £hzxhß ÂÍUSP.
(a) Explain Kirchhoff’s laws with neat diagram.
OR
(b) Explain hysteresis loop with neat diagram.

37. (A) AÊzu ÁøP uspº `÷hØÔ°ß Aø©¨¦ ©ØÖ® ÷Áø» ö\´²®
Âuzøu¨ £hzxhß ÂÍUSP.
AÀ-»-x
(B) AµøÁ C¯¢vµzvÀ EshõS® SøÓ£õkPÒ, Põµn[PÒ ©ØÖ® Aøu
{Áºzv ö\´²® •øÓPøÍ AmhÁøn¨£kzxP.
(a) Explain the construction and working principle of pressure type geyser with neat
diagram.
OR
(b) Tabulate the trouble shoot chart of a grinder.

-oOo-

No. of Printed Pages : 8
7702-A
!7702AIstYearBasicElectricalEngineering! £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 |õßS ©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

7702-A 2

1. AqÂÀ Ah[Q²ÒÍ £õP[PÒ :
(A) {³mµõßPÒ ©mk®
(B) G»UmµõßPÒ ©mk®
(C) G»Umµõß, ¦÷µõmhõß ©ØÖ® {³mµõß
(-D) ¦÷µõmhõßPÒ ©mk®
An atom consists of :
(a) Neutrons only
(b) Electrons only
(c) Electron, Proton and Neutron
(d) Protons only

2. ªß÷Úõmhzvß A»S :
(A) Áõmì (B) ÷ÁõÀm (C) K®ì (-D) B®¤¯º
The unit of current is :
(a) Watts (b) Volt (c) Ohms (d) Ampere

3. uõªµ® Gߣx J¸ |À» __________.
(A) ªß Põ¨¦¨ ö£õ¸Ò (B) SøÓPhzv
(C) ªßPhzv (-D) CøÁPÎÀ GxĪÀø»
Copper is a good :
(a) Insulator (b) Semiconductor
(c) Conductor (d) None of these

4. {ø»U Põ¢u® £¯ß£kzu¨£hõu Ch® :
(A) Gں⠫mhº (B) ªß©õØÔ
(C) J¼ ö£¸UQ (-D) øhÚ÷©õ
Permanent magnet is not used in :
(a) Energy meter (b) Transformer
(c) Loud speaker (d) Dynamo

3 7702-A

5. ysh¨£k® ªßÛ¯US Âø\°ß vø\¯õÚx Ax EshõPU Põµn©õÚ
Põ¢u¨¦» Á¼ø©U÷Põ, ©õÖu¾U÷Põ GvµõÚx GßÖ TÖ® Âv :
(A) ¤öͪ[Qß ChUøP Âv (B) •øÚ Âv
(C) ö»ßì Âv (-D) ¤öͪ[Qß Á»UøP Âv
The law states that the direction of the induced emf will be in opposition to the change in
field strength is :
(a) Fleming’s left hand rule (b) End rule
(c) Lenz’s law (d) Fleming’s right hand rule

6. ÷ÁõÀhõ ªßP»zvÀ ªßÚõØ £Sö£õ¸ÍõP¨ £¯ß£k® ö£õ¸Ò :
(A) P¢uP Aª»® (B) øím÷µõS÷Íõ›U Aª»®
(C) uõªµ \À÷£m Pøµ\À (-D) ø|m›U Aª»®
The electrolyte used in the voltaic cell is :
(a) Sulphuric acid (b) Hydrochloric acid
(c) Copper Sulphate solution (d) Nitric acid

7. ¼zv¯® A¯Û ªßP»zvß ªßÚÊzu ©v¨¦ :
(A) 3.6 •uÀ 5 V (B) 2 •uÀ 2.5 V (C) 5 •uÀ 6 V (-D) 2.5 •uÀ 3.6 V
The voltage range of a Lithium ion battery shall be :
(a) 3.6 to 5 V (b) 2 to 2.5 V (c) 5 to 6 V (d) 2.5 to 3.6 V

8. Ea\U Põµo°ß ©v¨¦ :
(A) 1.414 (B) π 2 (C) 1.11 (-D) 2
π
The value of peak factor is :

(a) 1.414 (b) π (c) 1.11 (d) 2
2 π

9. ªß ©Ö¨¦zvÓß (Impedance) Gߣuß A»S :
(A) öíºmì (B) öíßÔ (C) K® (-D) L£õµm
The unit of Impedance is :
(a) Hertz (b) Henry (c) Ohm (d) Farad

[ v¸¨¦P / Turn over

7702-A 4

10. ªß©õØÔ°ß C¸®¦ EÒÍP® Põ¨¤h¨£kÁuõÀ SøÓUP¨£kÁx :
(A) Eµõ´Ä CǨ¦ (B) ö\®¦ CǨ¦
(C) îìh›]ì CǨ¦ (-D) Gi ªß\õµ CǨ¦
In transformers, iron cores are laminated to reduce the :
(a) Friction loss (b) Copper loss
(c) Hysteresis loss (d) Eddy current loss

11. ªß\õµ CÊøÁUS¨ £¯ß£k® ªß÷Úõi :
(A) ÷|ºvø\ P»¨¦ ªß÷Úõi (B) ÷|ºvø\ öuõhº ªß÷Úõi
(C) ©õÖvø\ ªß÷Úõi (-D) ÷|ºvø\ Cøn ªß÷Úõi
The motor used in electric traction is :
(a) DC compound motor (b) DC series motor
(c) AC motor (d) DC shunt motor

12. ö£õ¸zxP :
(1) AoÀ Tk yshÀ ªß÷Úõi (i) iâmhÀ G»Um÷µõ ö©UPõÛUPÀ
(2) |ÊÄ Áøͯ yshÀ ªß÷Úõi (ii) {ø»¯õÚ ÷ÁP®
(3) Jzv¯[S ªß÷Úõi (iii) AvP xÁUPa _ÇØÖz vÓß
(4) £i{ø» ªß÷Úõi (iv) ªu©õÚ xÁUPa _ÇØÖz vÓß
(A) (1) - (iv), (2) - (iii), (3) - (ii), (4) - (i)
(B) (1) - (ii), (2) - (iii), (3) - (i), (4) - (iv)
(C) (1) - (iv), (2) - (iii), (3) - (i), (4) - (ii)
(-D) (1) - (iii), (2) - (iv), (3) - (ii), (4) - (i)
Match the following :
(1) Squirrel cage induction motor (i) Digital electromechanical
(2) Slip ring induction motor (ii) Constant speed
(3) Synchronous motor (iii) High starting torque
(4) Stepper motor (iv) Moderate starting torque
(a) (1)-(iv), (2)-(iii), (3)-(ii), (4)-(i)
(b) (1)-(ii), (2)-(iii), (3)-(i), (4)-(iv)
(c) (1)-(iv), (2)-(iii), (3)-(i), (4)-(ii)
(d) (1)-(iii), (2)-(iv), (3)-(ii), (4)-(i)

13. A¾ªÛ¯® ¦Â¨£µ¨¤À Põn¨£k® \uÃu® :
(A) 7.82 (B) 7.28 (C) 8.72 (-D) 8.27
The percentage of Aluminium found in the earth crust is :
(a) 7.82 (b) 7.28 (c) 8.72 (d) 8.27

5 7702-A

14. y´ø©¯õÚ SøÓPhzv GÚ¨£kÁx :
(A) ªßPhzuõ¨ ö£õ¸Ò (B) ¦Ó¯»õÚ SøÓPhzv
(C) |À» Phzv (-D) EÒÍõº¢u SøÓPhzv
A pure semiconductor is known as :
(a) Insulating material (b) Extrinsic Semiconductor
(c) Good conductor (d) Intrinsic Semiconductor

15. Aø»÷£] Gߣx :
(A) ö©UPõÛUPÀ \õuÚ®
(B) ªßÚq¯À \õuÚ®
(C) G»Um÷µõ ö©UPõÛUPÀ \õuÚ®
(-D) ªßÛ¯À \õuÚ®
Mobile phone is a :
(a) Mechanical device
(b) Electronic device
(c) Electromechanical device
(d) Electrical device

£S-v & II / PART - II
SÔ¨¦ : GøÁ÷¯Ý® £zx ÂÚõU-P-ÐUS Âøh-¯-ÎU-P-Ä®. ÂÚõ Gs 28 &US
Pm-hõ-¯-©õP Âøh-¯-ÎU-P-Ä®. 10x3=30
Note : Answer any ten questions. Question No. 28 is compulsory.

16. ªß Avºa]ø¯z uºUP GkUP ÷Ási¯ •ßöÚa\›UøPPÒ ¯õøÁ ?
What are the precautions to be taken to avoid electric shock ?

17. PhzvPÒ GßÓõÀ GßÚ ?
What are conductors ?

18. Qºa\õ¨¤ß ªß÷Úõmh Âvø¯ Áøµ¯ÖUPÄ®.
Define Kirchhoff’s current law.

[ v¸¨¦P / Turn over

7702-A 6

19. ÷©UìöÁÀ¼ß uUøP v¸S Âvø¯U TÖP.
State Maxwell’s cork screw rule.

20. xøn ªßP»zvß ö\¯À£õmøhU TÖP.
State the functions of a secondary cell.

21. ©õÖvø\ ªß\õµzvß RMS ©v¨¦ GßÓõÀ GßÚ ?
What is the RMS value of an alternating current ?

22. ªß©õØÔ°ß ªßÚÊzu ÂQu® GßÓõÀ GßÚ ?
What is the voltage transformation ratio of transformer ?

23. ªß©õØÔ°À HØ£k® CǨ¦PÒ ¯õøÁ ?
What are the losses in transformers ?

24. L¤öͪ[Qß ChUøP Âvø¯U TÖP.
State Fleming’s left hand rule.

25. J¸ {ø» ªß÷Úõi uõ÷Ú _Ç»õx. Hß ?
The single phase motor is not self starting. Why ?

26. ""U} ªßÚÊzu®'' (Knee Voltage) GßÓõÀ GßÚ ?
What is called Knee Voltage ?

27. CønvÓß G»UmµõßPÒ GßÓõÀ GßÚ ?
What is called Valance electrons ?

28. ö£õÔ°¯À ö£õ¸mPÎß ªßÛ¯À £s¦PÒ ¯õøÁ ?
What are the electrical properties of engineering materials ?

7 7702-A

£S-v & III / PART - III
SÔ¨¦ : GøÁ÷¯Ý® I¢x ÂÚõU-P-ÐUS Âøh-¯-ÎU-P-Ä®. ÂÚõ Gs 35 &US
Pm-hõ-¯-©õP Âøh-¯-ÎU-P-Ä®. 5x5=25
Note : Answer any five questions. Question No. 35 is compulsory.
29. AqÂß Aø©¨ø£ ÂÁ›UPÄ®.
Explain the structure of an atom.

30. Qºa\õ¨ Âvø¯¨ £¯ß£kzv 2 Ω ªßuøh ÁÈ÷¯ £õ²® ªß÷ÚõmhzøuU
Psk¤iUPÄ®.

Calculate the current through the 2 Ω resistor by using Kirchhoff’s Law.

31. ysh¨£k® ªßÛ¯US Âø\°ß AÍøÁ AvP›US® •øÓPøÍ ÂÍUSP.
Explain the methods of increasing the magnitude of induced emf.

32. J¸ {ø» \¨øÍø¯ Âh ‰ßÖ {ø» \¨øÍ £¯ß£kzxÁuØPõÚ Põµn[PÒ
¯õøÁ ?
What are the reasons for using three phase system over single phase system.

33. ÷|ºvø\ ªßÚõUQ°À emf EshõÁuØPõÚ \©ß£õmiøÚ ÂÁ›UPÄ®.
Derive the emf generated in D.C. generators.

34. ö£õÔ°¯À ö£õ¸mPÎß £s¦ ÁøPPøÍa _¸UP©õP ÂÁ›UPÄ®.
Explain shortly about the various properties of engineering materials.

35. PN \¢v øh÷¯õiß (PN Junction Diode) •ß÷ÚõUSa \õº¦ ö\¯À£õmiøÚ
ÂÁ›UPÄ®.
Explain the working of a PN Junction Diode in forward bias.

[ v¸¨¦P / Turn over

7702-A 8

£S-v & IV / PART - IV
SÔ¨¦ : AøÚz-x ÂÚõU-P-ÐU-S® Âøh-¯-ÎU-P-Ä®. ÷uøÁ¯õÚ Ch[PÎÀ £h®
ÁøµP. 2x10=20
Note : Answer all the questions. Draw diagrams wherever necessary.

36. (A) Cøn ªß _ØÔß Aø©¨¦ ©ØÖ® ÷Áø» ö\´²® Âuzøu ÂÁ›UPÄ®.
AÀ-»-x
(B) PõŸ¯ Aª» ªßP»zvß Aø©¨¦ ©ØÖ® ö\¯À£õmøh¨ £hzxhß
ÂÁ›UPÄ®.
(a) Describe the construction and working of a parallel circuit.
OR
(b) Explain the construction of Lead acid battery and its working principle.

37. (A) ªß ©õØÔ°¾ÒÍ B´Ä •øÓPøͨ £ØÔ ÂÁ›UPÄ®.
.
AÀ-»-x
(B) ²ÛÁº\À ªß÷Úõi°ß Aø©¨¦ £h® Áøµ¢x ö\¯À£õmøh
ÂÁ›UPÄ®.
(a) Explain the testing methods of Transformers.
OR
(b) Explain with neat sketch the construction and working of an Universal Motor.

-o0o-

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