CBSE Class 12 Question Paper 2023 Electronics Technology

Qu e st i o n

P a p e r
2023

Series HEFG Set-4
àíZ-nÌ H$moS>
Q.P. Code 344
amob Z§.
Roll No.

ELECTRONICS TECHNOLOGY
:3 : 60
Time allowed : 3 hours Maximum Marks : 60

H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _o§ _w{ÐV n¥ð> 11 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 _| >24 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$m g_` {X`m J`m h¡ & àíZ-nÌ H$m {dVaU
10.15 ~Oo {H$`m OmEJm & 10.15 ~Oo go 10.30 ~Oo VH$ N>mÌ Ho$db
àíZ- -nwpñVH$m na H$moB© CÎma Zht {bI|Jo &

Please check that this question paper contains 11 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 24 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.
*
344 Page 1 of 11 P.T.O.

:

(i)

(ii) 24 :

(iii)

(iv) (6 + 18) = 24 3
(6 + 11) = 17

(v)

(vi) : 30 :

(a) 6

(b)

(c)

(d) /

(vii) : 30 :

(a) 18

(b) 11

(c)

(d) /

IÊS> H$ $
(dñVw{ZîR> àíZ) (30 A§H$)

1. {XE JE 6 àíZm| _| go {H$Ýht 4 àíZm| Ho$ CÎma Xr{OE & 4 1=4

(i) àñVwVrH$aU V¡`ma H$aZo Ho$ {bE Cn`moJ {H$E OmZo dmbo {H$Ýht Xmo gm°âQ>do`am| Ho$
Zm_ {b{IE &
344 Page 2 of 11

General Instructions :

(i) Please read the instructions carefully.

(ii) This question paper consists of 24 questions in two Sections : Section A
and Section B.

(iii) Section A has Objective type questions whereas Section B contains
Subjective type questions.

(iv) Out of the given (6 + 18) = 24 questions, a candidate has to answer
(6 + 11) = 17 questions in the allotted (maximum) time of 3 hours.

(v) All questions of a particular section must be attempted in the correct
order.
(vi) Section A : Objective Type Questions (30 marks) :
(a) This section has 6 questions.
(b) There is no negative marking.
(c) Do as per the instructions given.
(d) Marks allotted are mentioned against each question/part.
(vii) Section B : Subjective Type Questions (30 marks) :
(a) This section has 18 questions.
(b) A candidate has to do 11 questions.
(c) Do as per the instructions given.
(d) Marks allotted are mentioned against each question/part.

Section A
(Objective Type Questions) (30 Marks)

1. Answer any 4 questions out of the given 6 questions. 4 1=4

(i) Name any two softwares used for creating presentations.

344 Page 3 of 11 P.T.O.

.
(ii) Amn Am_Vm¡a na ñbmBS> Ho$ erf©H$ H$mo {H$g àH$ma gao{IV H$a|Jo ?
(a) boâQ>
(b) amBQ>
(c) g|Q>a
(d) OpñQ>\$mB©

(iii) _____________ naoemZ Am¡a {Zame _hgyg H$aZo H$s pñW{V h¡ &
(a) AJ«oeZ>
(b) ñQ´>og>
(c) h¡ßnrZog
(d) _mo{Q>doeZ
(iv) ?

(v) {ZåZ{b{IV _| go H$m¡Z-gm EH$ àH$ma H$m CÚ_r h¡ ?
(a) godm>
(b) ì`mnma
(c) Am¡Úmo{JH$
(d)

(vi) g\
h¡ ?
2. {XE JE 7 àíZm| _| go {H$Ýht 5 àíZm| Ho$ CÎma Xr{OE & 5 1=5
(i) {~Obr Ho$ PQ>Ho$ H$mo n[a^m{fV H$s{OE &
(ii) CÚmoJm| _| Xþ ?
(iii) {H$Ýht Xmo gwajmË_H$ CnH$aUm| Ho$ Zm_ {b{IE &
(iv) RF dmoëQ>oO ñVa dmbr YmVw H$s dñVwAm| H$mo Ny>Zo go __________ hmo
gH$Vm h¡ &
(v) AmJ _| à`wº$ {dÚwV CnH$aUm| na {H$g àH$ma Ho$ A{½Zem_H$ `§Ì H$m à`moJ {H$`m
OmVm h¡ ?
(vi) {H$gr EH$ _Zmod¡km{ZH$ IVao H$m Zm_ {b{IE &
(vii) ?
344 Page 4 of 11

(ii) How will you usually align the title of a slide ?
(a) Left
(b) Right
(c) Center
(d) Justify
(iii) __________ is a state of feeling upset and hopeless.
(a) Aggression
(b) Stress
(c) Happiness
(d) Motivation
(iv) Which type of motivation is associated with activities that are
enjoyable in themselves ?
(v) Which of the following is not a type of entrepreneur ?
(a) Service
(b) Business
(c) Industrial
(d) Last generation
(vi) Why do entrepreneurs require persistence as one of the
competencies to succeed ?

2. Answer any 5 out of the given 7 questions. 5 1=5

(i) Define electric shock.
(ii) Why do accidents occur in industries ?
(iii) Write the names of any two protective equipments.
(iv) Touching of metal objects with induced high RF voltage level can
cause __________.
(v) Which type of fire extinguisher is to be used on electrical equipments
used under fire ?
(vi) Write the names of any one psychological hazard.
(vii) What do you mean by anticipation ?
344 Page 5 of 11 P.T.O.

3. {XE JE 7 àíZm| _| go {H$Ýht 6 àíZm| Ho$ CÎma Xr{OE & 6 1=6
(i) H$m~©Z _mBH«$mo\$moZ H$m Am{dîH$ma {H$gHo$ Ûmam {H$`m J`m ?
(ii) {H$g bmCS>ñnrH$a _| S>m`\«$m_ H$m à`moJ Zht {H$`m OmVm h¡ ?
(iii) H$moZ bmCS>ñnrH$a H$s VwbZm _| hm°Z© bmCS>ñnrH$a A{YH$ Hw$eb (Xj) h¡ &
(ghr/JbV)
(iv) Mb Hw$ÊS>br e§Hw$ àH$ma Ho$ bmCS>ñnrH$a H$m Mw§~H$ _________ H$m ~Zm hmoVm h¡ &
(v) H$m¡Z-gm _mBH«$mo\$moZ \¡$amS>o Ho$ {Z`_ Ho$ {gÕm§V na H$m`© H$aVm h¡ ?
(vi) dy\$a _________ Amd¥{Îm`m| Ho$ {bE hmoVm h¡ &
(vii) {H«$ñQ>b _mBH«$mo\$moZ Ho$ bm^ {b{IE &

4. {XE JE 6 àíZm| _| go {H$Ýht 5 àíZm| Ho$ CÎma Xr{OE & 5 1=5
(i) EH$ gr.S>r. ?
(ii) S>r.dr.S>r. H$m nyU© ê$n h¡ ?
(iii) {S>{OQ>b [aH$m°{S>ªJ _|, H$m¡Z-gm g{H©$Q> EZmbm°J {g½Zb H$mo {S>{OQ>b {g½Zb _|
~XbVm h¡ ?
(iv) ½bmg _mñQ>a, Omo gr.S>r./S>r.dr.S>r. {Z_m©U H$m EH$ MaU h¡, H$mo ñQ>¡åna ^r H$hm
OmVm h¡ & (ghr/JbV)
(v) hmCghmoëS> Q>on [aH$m°S>©a _| H$m¡Z-gm _mBH«$mo\$moZ BñVo_mb hmoVm h¡ ?
(vi) ?

5. {XE JE 6 àíZm| _| go {H$Ýht 5 àíZm| Ho$ CÎma Xr{OE & 5 1=5
(i) NTSC H$m nyU ?
(ii) EH$ Q>r.dr. [agrda _|, RF Q>çyZa _| Am°{gboQ>a H$s Amd¥{Îm n[adV©Zerb hmoVr
h¡ & (ghr/JbV)
(iii) Q>r.dr. ___________ go {b`m OmVm h¡ &
(iv) ?
(v) ___________ Ho$ {bE {H$`m Om
gH$Vm h¡ &
(vi) Q>r.dr. ?

344 Page 6 of 11

3. Answer any 6 out of the given 7 questions. 6 1=6
(i) By whom is the carbon microphone invented ?
(ii) In which loudspeaker is diaphragm not used ?
(iii) The horn type loudspeaker is more efficient than the cone type
loudspeaker. (True/False)
(iv) Magnet of moving coil cone type loudspeaker is made of __________.
(v)
(vi) Woofer is meant for _________ frequencies.
(vii) Write advantages of crystal microphone.

4. Answer any 5 out of the given 6 questions. 5 1=5

(i) What is the diameter and thickness of a CD ?

(ii) What is the full form of DVD ?

(iii) In digital recording, which circuit converts analog signal into digital
signal ?

(iv) Glass master, which is a step of CD/DVD manufacturing is also
called stamper. (True/False)

(v) Which microphone is used in household tape recorders ?

(vi) What do you mean by dynamic range ?

5. Answer any 5 out of the given 6 questions. 5 1=5

(i) What is the full form of NTSC ?

(ii) In a TV receiver, the frequency of oscillator in RF tuner is variable.
(True/False)
(iii) The signal to the TV picture tube is taken from ________.

(iv) What does saturation indicate ?
(v) The television picture tube magnetic field can be used for _________.

(vi) What is the range of TV remote control ?

344 Page 7 of 11 P.T.O.

6. {XE JE 6 àíZm| _| go {H$Ýht 5 àíZm| Ho$ CÎma Xr{OE & 5 1=5

(i) \ _| {H$g àH$ma Ho$ nona H$m Cn`moJ hmoVm h¡ ?
(ii) Q>obr\$moZ H$m Am{dîH$ma {H$g df© _| hþAm Wm ?
(iii) ~¡Q>ar E{b{_ZoQ>a H$m AmCQ>nwQ> gßbmB© {H$VZm hmoVm h¡ ?
(iv) DMP H$m nyU ?
(v) ?
(vi) S´>_ EH$ ___________ {gb|S>a h¡ &
IÊS> I $
({df`naH$ àíZ) (30 A§H$)
5 3
20 30 3 2=6

7. ñàoS>erQ> AZwà`moJ H$s H$moB© Xmo {deofVmE± {b{IE &
8.

9. EH$ g\ ?

10. n¡am ?

11. {H$Ýht Xmo VH$ZrH$m| H$m gwPmd Xr{OE Omo h_| b§~o g_` Ho$ {bE gH$mamË_H$ Ñ{îQ>H$moU ~ZmE
aIZo _| _XX H$a gH$Vr h¢ &
5 3 20 30 3 2=6

12. ì`mdgm{` ? CZ_| go Hw$N> H$m Zm_ ~VmBE &

13. dy\$a na EH$ g§{jßV {Q>ßnUr {b{IE &
14. hoS>-E§S> g~-
15. LED TV Ho$ bm^ {b{IE &

16. O~ ñH¡$Za J{V_mZ Z hmo, Vmo CgH$m g§^m{dV hb {b{IE &
344 Page 8 of 11

6. Answer any 5 out of the given 6 questions. 5 1=5
(i) Which type of paper is used in a FAX machine ?
(ii) In which year was the telephone invented ?
(iii) What is the output supply of battery eliminator ?
(iv) What is the full form of DMP ?
(v) What do you mean by Tuner ?
(vi) The drum is a _________ cylinder.

Section B
(Subjective Type Questions) (30 Marks)

Answer any 3 questions out of the given 5 questions on Employability skills.
Answer each question in 20 30 words. 3 2=6

7. Write any two features of spreadsheet application.

8. Write any four barriers which an entrepreneur has to face.

9. What are the various organisational skills required to become a successful
entrepreneur ?

10. What do you mean by Paranoid disorder ?

11. Suggest any two techniques that can help us to maintain a positive outlook
in the long run.

Answer any 3 out of the given 5 questions in 20 30 words each. 3 2=6

12. What do you mean by occupational diseases ? Name some of them.

13. Write a short note on woofer.

14. Write any two faults which occur in head-end subsection.

15. Write the advantages of LED TV.

16. Write the possible solution for a scanner when it is not moving.
344 Page 9 of 11 P.T.O.

3 2 30 50 2 3=6

17. H$m~©Z _mBH«$mo\$moZ Ho$ JwU Am¡a Xmof {b{IE &

18. EZmbm°J Am¡a {S>{OQ>b ?

19. EM.S>r. Q>r.dr. H$s Img {deofVmE± {b{IE &

5 3 50 80 3 4=12

20. gwajmË_H$ CnH$aUm| na EH$ g§{jßV {Q>ßnUr {b{IE &
21. _yqdJ H$m°Bb _mBH«$mo\$moZ Ho$ {Z_m©U Am¡a H$m`©àUmbr H$s ì`m»`m H$s{OE &

22. Q>on [aH$m°S>©a H$m ãbm°H$ S>m`J«m_ ~ZmBE Am¡a BgH$s H$m`©àUmbr g_PmBE &

23. S>m`J«m_ H$s ghm`Vm go Q>r.dr. [agrda H$s H$m`©àUmbr g_PmBE &
24. EH$ ãbm°H$ AmaoI H$s ghm`Vm go _mBH«$modod AmodZ Ho$ H$m`© H$mar {gÕm§V H$s ì`m»`m
H$s{OE &

344 Page 10 of 11

Answer any 2 out of the given 3 questions in 30 50 words each. 2 3=6

17. Write the merits and demerits of a carbon microphone.

18. What do you mean by analog and digital sound recording ?

19. Write the special features of HD TV.

Answer any 3 out of the given 5 questions in 50 80 words each. 3 4=12

20. Write a short note on protective equipments.

21. Explain the construction and working of moving coil microphone.

22. Draw the block diagram of a Tape recorder and explain its working.

23. With the help of a diagram explain the working of a TV receiver.

24. Explain the working principle of microwave oven with the help of a block
diagram.

344 Page 11 of 11 P.T.O.