CBSE Class 12 Question Paper 2022 Electronics Technology

SET-4
Series %BAB% àíZ-nÌ H$moS>
Q.P. Code 344
amob Z§. narjmWu àíZ-nÌ H$moS> H$mo CÎma-nwpñVH$m Ho$
Roll No. _wI-n¥ð >na Adí` {bIo§ &
Candidates must write the Q.P. Code on
the title page of the answer-book.

H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _o§ _w{ÐV n¥ð> 7 h¢ &
àíZ-nÌ _| Xm{hZo hmW H$s Amoa {XE JE àíZ-nÌ H$moS H$mo narjmWu CÎma-nwpñVH$m Ho$ _wI-n¥>ð> na
{bI| &
H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _| >25 àíZ h¢ &
H¥$n`m àíZ H$m CÎma {bIZm ewê$ H$aZo go nhbo, CÎma-nwpñVH$m _| àíZ H$m H«$_m§H$ Adí`
{bI| &
Bg àíZ-nÌ 15 {_ZQ >H$m g_` {X`m J`m h¡ & àíZ-
10.15 ~Oo {H$`m OmEJm & 10.15 ~Oo go 10.30 ~Oo VH$ N>mÌ Ho$db àíZ-
Bg Ad{Y Ho$ Xm¡amZ do CÎma-nwpñVH$m na H$moB© CÎma Zht {bI|Jo &
Please check that this question paper contains 7 printed pages.
Q.P. Code given on the right hand side of the question paper should be written
on the title page of the answer-book by the candidate.
Please check that this question paper contains 25 questions.
Please write down the serial number of the question in the
answer-book before attempting it.
15 minute time has been allotted to read this question paper. The question
paper will be distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the
students will read the question paper only and will not write any answer on
the answer-book during this period.

ELECTRONICS TECHNOLOGY
1
:1 : 30
2
1
Time allowed : 1 hours Maximum Marks : 30
2

344 Page 1 P.T.O.

:

(i)

(ii)

(iii) 5 6
1 4
5 6

(iv) 17 16
7 13
14 18
19 22

(v) 8 3
23 25

(vi)

(vii) /

IÊS H$
(amoµOJma H$m¡eb) (3+2=5 A§H$)

4 3 3 1=3

1. ? 1

2. ? 1

3. UNEP H$m nyU© ê$n {b{IE & 1

4. YZ Am¡a g§gmYZm| H$s H$_r, CÚ_r ~ZZo _| ~mYm h¡ & 1
(a) ghr
(b) µJbV
344 Page 2

General Instructions :
(i) Please read the instructions carefully.
(ii) This question paper is divided into three sections, viz. Section A,
Section B and Section C.
(iii) Section A is of 5 marks and has 6 questions on Employability Skills.
(a) Question number 1 to 4 are one mark questions. Attempt any three
questions.
(b) Question number 5 and 6 are two marks questions. Attempt any
one question.
(iv) Section B is of 17 marks and has 16 questions on Subject Specific Skills.
(a) Question number 7 to 13 are one mark questions. Attempt any five
questions.
(b) Question number 14 to 18 are two marks questions. Attempt any
three questions.
(c) Question number 19 to 22 are three marks questions. Attempt any
two questions.
(v) Section C is of 8 marks and has 3 Competency-Based Questions.
Questions number 23 to 25 are four marks questions. Attempt any
two questions.
(vi) Do as per the instructions given in the respective sections.
(vii) Marks allotted are mentioned against each section/question.

SECTION A
(Employability Skills) (3+2=5 marks)

Answer any 3 questions out of the given 4 questions. 3 1=3

1. What do you mean by student special class ? 1

2. What do you mean by eco-friendly material ? 1

3. Write the full form of UNEP. 1

4. Shortage of funds and resources is a barrier to become an entrepreneur. 1
(a) True
(b) False
344 Page 3 P.T.O.

2 1 1 2=2
5. ? gwYma H$aZo _| BgH$s
^y{_H$m ñnîQ> H$s{OE & 2
6. ì`dgm` MbmVo g_` EH$ CÚ_r H$mo {H$Z _w»` g
h¡ ? 2
IÊS I
({df` {d{eï> H$m¡eb) (5+6+6=17 A§H$)

7 5 5 1=5

7. NTSC ? 1

8. a§JrZ Q>r.dr. Ho$ àmW{_H$ a§J ________ h¢ & 1

9. Q>r.dr. [a_moQ> H§$Q´>mob nëg H$moS> _m°Sw>{bV B§\«$maoS> bmBQ> Ho$ {gÕm§V na H$m_ H$aVm h¡ & 1
(a) ghr
(b) µJbV
10. a§JrZ Q>r.dr. ? 1

11. _mBH«$modod AmodZ h_oem ________ Am¡a ________ Ho$ gmW àXmZ {H$`m OmVm h¡ & 1

12. S´>_ EH$ ________ {gb|S>a h¡ & 1

13. EH$ \ ________ Am¡a ________ XñVmdoµOm| Ho$ {bE {S>O
µ mBZ {H$`m J`m h¡ & 1

5 3 3 2=6

14. LED Q>r.dr. ? BgH$m bm^ {b{IE & 2

15. [a_moQ> H§$Q´>mob H$s H$moB© Mma {deofVmE± {b{IE & 2

16. {H$Ýht -{ZdmaU
Ûmam XoI|Jo & 2

17. Q>obr\$moZ H$m Am{dîH$ma H$~ Am¡a {H$gHo$ Ûmam {H$`m J`m Wm ? 2

18. EH$ ñH¡$Za _| N>{d ñnîQ> Zht h¡ µJbVr H$m g§^m{dV g_mYmZ {b{IE & 2

344 Page 4

Answer any 1 question out of the given 2 questions. 1 2=2
5. What do you understand by green job ? Explain its role in improving
energy and use of raw materials. 2
6. What are the key problems an entrepreneur may face while running a
business ? 2

SECTION B
(Subject Specific Skills) (5+6+6=17 marks)

Answer any 5 questions out of the given 7 questions. 5 1=5
7. What is the full form of NTSC ? 1
8. The primary colours in a colour TV are _________. 1
9. TV remote control works on the principle of pulse code modulated
infrared light. 1
(a) True
(b) False

10. How many electron guns are there in a colour TV picture tube ? 1

11. A microwave oven is always provided with ________ and ________. 1

12. The drum is a _________ cylinder. 1

13. A FAX machine is designed to _________ and _________ documents. 1

Answer any 3 questions out of the given 5 questions. 3 2=6

14. What is LED TV ? Write its advantage. 2

15. Write any four features of a Remote Control. 2

16. Write any two precautions that you will observe while troubleshooting an
electronic equipment. 2

17. When was Telephone invented and by whom ? 2

18. . 2

344 Page 5 P.T.O.

4 2 2 3=6

19. EH$ [aH$m°S>©a Ho$ Xmof ImoOZo Am¡a gwYma Ho$ {bE EH$ MmQ>© ~ZmBE & 3

20. ? 3

21. _mBH«$modod AmodZ na H$m_ H$aVo g_` gwajm {Xem{ZX}e {b{IE & 3

22. EH$ qàQ>a Ho$ Hw$N> g§^m{dV Xmof Am¡a CZHo$ g_mYmZ {b{IE & 3

IÊS J
(`mo½`Vm-AmYm[aV àíZ) (2 4=8 A§H$)

3 2 2 4=8

23. {S>ñH$ [aH$m°{S>ªJ àUmbr Ho$ ãbm°H$ AmaoI Am¡a H$m`©H$mar {gÕm§V H$s ì`m»`m H$s{OE & 4

24. Q>r.dr. Q´>m§g{_Q>a Ho$ EH$ ñdÀN> Am¡a Zm_m§{H$V ãbm°H$ AmaoI ~ZmBE & 4

25. ãbm°H$ AmaoI H$s ghm`Vm go \ H$s H$m`©àUmbr H$s ì`m»`m H$s{OE & 4

344 Page 6

Answer any 2 questions out of the given 4 questions. 2 3=6
19. Make a chart for fault finding and rectification of a Recorder. 3
20. What do you understand by brightness, contrast, luminance ? 3
21. Write safety guidelines while working on a Microwave oven. 3
22. Write some possible faults of a Printer and their solutions. 3

SECTION C
(Competency-Based Questions) (2 4=8 Marks)

Answer any 2 questions out of the given 3 questions. 2 4=8

23. Explain block diagram and working principle of disc recording system. 4

24. Draw a neat and labelled block diagram of TV transmitter. 4

25. Explain the working of a FAX machine with the help of a block diagram. 4

344 Page 7 P.T.O.