CBSE Class 12 Question Paper 2024 Electronics Technology

CBSE

SET-4
Series &RQPS 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> 15 h¢ &
H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _| >24 àíZ 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¥$n`m àíZ H$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 15 printed pages.
Please check that this question paper contains 24 questions.
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 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

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

1-344 Page 1 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> àH$ma Ho$ àíZ) (30 A§H$)

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

(i) g§nyU© {df` _| gab {df` Am¡a CgH$m _________ em{_b h¢ &
(ii) Bg àH$ma Ho$ ì`{º$Ëd {dH$ma H$s {deofVm AË`{YH$ ì`mdgm{`H$Vm, ì`dñWm Am¡a
gm\$-g\$mB© h¡ :
(A) Am{lV
(B) A§Vam~§Y
(C) nmJb
(D) OwZyZr
1-344 Page 2

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 out of the given 6 questions on Employability Skills. 4 1=4
(i) The complete subject consists of simple subject and its ___________.
(ii) This type of personality disorder is characterized by extreme
professionalism, order and neatness :
(A) Dependent
(B) Schizoid
(C) Paranoid
(D) Obsessive

1-344 Page 3 P.T.O.

(iii) am_ _| ImbrnZ Am¡a n[aË`mJ H$s ^mdZm h¡ & Cgo {H$g àH$ma H$m ì`{º$Ëd {dH$ma h¡ ?
(A) gr_maoIm
(B) AmË__w½Y
(C) A{^Z`-g§~§Yr
(D) Agm_m{OH$

(iv) Cg em°Q>©H$Q> Hw§$Or H$m Zm_ ~VmBE {OgH$m Cn`moJ g^r H$m M`Z H$a| {dH$ën Ho$
{bE {H$`m OmVm h¡ &
(A) Ctrl + C >
(B) Ctrl + X
(C) Ctrl + Y
(D) Ctrl + A
(v) E§Ob {ZdoeH$ dh ì`{º$ h¡ Omo :
(A) ì`mnma H$aZo Ho$ {bE ~¢H$ go H$O© boVm h¡ &
(B) EH$ H§$nZr `m ñQ>mQ>©-An _| AnZr IwX H$s ny±Or {Zdoe H$aVm h¡ &
(C) ì`mnma H$aZo Ho$ {bE gaH$ma go AZwXmZ boVm h¡ &
(D) ñQ>m°H$ _mH}$Q> _| n¡gm {Zdoe H$aVm h¡ &
(vi) RWHS H$m _Vb~ __________ h¡ &
(A) Ob g§M`Z àUmbr _| H$_r ([aS>çyg dmQ>a hmd}ñQ> {gñQ>_)
(B) dfm© Ob g§M`Z àUmbr (aoZ dmQ>a hmd}pñQ>¨J {gñQ>_)
(C) dfm© Ho$ gmW g§M`Z àUmbr (aoZ {dW hmd}ñQ> {gñQ>_)
(D) g§M`Z àUmbr Ho$ {bE Ob nwZ:Cn`moJ (ar`yµO dmQ>a \$m°a hmd}ñQ> {gñQ>_)

2. {XE JE 7 àíZm| _| go {H$Ýht 5 Ho$ CÎma Xr{OE & 5 1=5

(i) gwajm H$mo ~Mmd Ho$ ê$n _| n[a^m{fV {H$`m J`m h¡ :
(A) IVam go
(B) AXjVm go
(C) A`mo½`Vm go
(D) kmZ H$s H$_r go

(ii) AñW_m EH$ CnOr{dH$mOÝ` ~r_mar h¡ & (ghr/µJbV)
(iii) _yë`m§H$Z IVao H$m _mn h¡ {Ogo CnH$aUm| Am¡a VH$ZrH$m| H$s ghm`Vm go Am±H$m Om
gH$Vm h¡ & (ghr/µJbV)
1-344 Page 4

(iii) Ram has feelings of emptiness and abandonment. Which type of
personality disorder does he have ?
(A) Borderline
(B) Narcissistic
(C) Histrionic
(D) Antisocial

(iv) S
(A) Ctrl + C
(B) Ctrl + X
(C) Ctrl + Y
(D) Ctrl + A
(v) An angel investor is person who
(A) Takes bank loan for doing business.
(B) Invests own money in a company or a start-up.
(C) Takes government grants for doing business.
(D) Invests money in stock market.

(vi) RWHS stands for __________.
(A) Reduce Water Harvest System
(B) Rain Water Harvesting System
(C) Rain With Harvest System
(D) Reuse Water for Harvest System

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

(i) Safety is defined as the protection from :
(A) Danger
(B) Inefficiency
(C) Incompetence
(D) Lack of knowledge

(ii) Asthma is an occupational disease. (True/False)

(iii) Evaluation is the measure of hazards which can be assessed with
the help of tools and techniques. (True/False)

1-344 Page 5 P.T.O.

(iv) {MÌ H$mo nhMm{ZE :

(A) AmaE\$ IVam (B) gwajm Mí_m
(C) ldU gwajm (D) boµOa IVam
(v) g§H«$m_H$ An{eîQ> BgHo$ CXmhaU h¢ :
(A) ^m¡{VH$ IVao
(B) amgm`{ZH$ IVao
(C) O¡{dH$ IVao
(D) _Zmod¡km{ZH$ IVao
(vi) {h`[a¨J àmoQ>o >rH$ go Cn`moJ {H$E OmZo na emoa> Ho$ Omo{I_ ñVa Am¡a ldU hm{Z
Ho$ Omo{I_ H$mo H$_ H$aVo h¢ & (ghr/µJbV)
(vii) boµOa go ____________ hmo gH$Vm h¡ &
(A) H$m°{Z©`m _| gyOZ
(B) CÞV ÑpîQ>
(C) ar
(D) AÀN>m aº$ g§Mma

3. {XE JE 7 àíZm| _| go {H$Ýht 6 Ho$ CÎma Xr{OE & 6 1=6
(i) H¡$no{gQ>|g _mBH«$moµ\$moZ H$m Xÿgam Zm_ h¡ __________ &
(ii) {H«$ñQ>b bmCS>ñnrH$a H$s BZnwQ> B§nrS>oÝg h¡ :
(A) H¡$no{g{Q>d
(B) ao{gpñQ>d
(C)
(D) H¡$no{g{Q>d Am¡a ao{gpñQ>d
(iii) __________ H$s _XX go A{YH$ Xe©H$ dJ© dº$m H$s AmdmµO gwZ gH$Vo h¢ &
(A) àdY©H$ (Eoåßbr\$m`a)
(B) _mBH«$moµ\$moZ Am¡a ñnrH$a
(C) XmobH$
(D) \$m`a
1-344 Page 6

(iv) Identify the picture.

(A) RF Hazard (B) Safety goggle
(C) Hearing protection (D) Laser hazard
(v) Bacteria and infectious waste are examples of :
(A) Physical hazards
(B) Chemical hazards
(C) Biological hazards
(D) Psychological hazards
(vi) Hearing protectors reduce noise exposure level and the risk of
hearing loss when used properly. (True/False)
(vii) Laser can cause :
(A) Corneal inflammation
(B) Enhanced vision
(C) Enhanced hearing
(D) Better blood circulation

3. Answer any 6 out of the given 7 questions. 6 1=6
(i) The other name of Capacitance microphone is _____________.
(ii) The input impedance of a crystal loudspeaker is :
(A) Capacitive
(B) Resistive
(C) Inductive
(D) Capacitive and Resistive
(iii) The large audience can hear the voice of a speaker with the help of :
(A) Amplifier
(B) Microphone and speaker
(C) Oscillator
(D) Rectifier

1-344 Page 7 P.T.O.

(iv) {JQ>ma H$s \ 80 Hz go 1650 Hz hmoVr h¡ & (ghr/µJbV)
(v) a àUmbr _| _Ü`-Amd¥{Îm`m| H$mo nwZ:CËnÞ H$aZo Ho$
{bE {H$`m OmVm h¡ & (ghr/µJbV)
(vi) _mBH«$moµ\$moZ H$s aoqQ>J Ho$ {bE à`wº$ Üd{Z X~md H$s BH$mB© h¡ :
(A) ~ma
(B) dm°Q>
(C) nmñH$b
(D) S>ogr~b
(vii) _yqdJ H$m°Bb bmCS>ñnrH$a H$m Cn`moJ __________ _| {H$`m OmVm h¡ &
4. {XE JE 6 àíZm| _| go {H$Ýht 5 Ho$ CÎma Xr{OE & 5 1=5
(i) Mw§~H$s` [aH$m°{S>ªJ _| [aH$m°S>© hoS> go {H$g àH$ma H$s Ymam àdm{hV hmoVr h¡ ?
(A) S>rgr
(B) Egr
(C) Am°{S>`mo {g½Zb
(D) AmaE\$

(ii) {S>ñH$ S´>mBd V§Ì Ho$ _w»` KQ>H$ h¢ _________ Am¡a __________ &
(iii) S>rdrS>r H$s ^§S>maU j_Vm hmoVr h¡ :
(A) GB
(B) GB
(C) GB
(D) GB
(iv) {dZmBb {S>ñH$ na Üd{Z H$mo {S>ñH$ na Im±Mo Ho$ ê$n _| [aH$m°S>© {H$`m OmVm
h¡ & (ghr/µJbV)
(v) Üd{Z [aH$m°{S>ªJ Am¡a nwZéËnmXZ H$m {dMma {dH${gV H$aZo dmbo nhbo d¡km{ZH$
__________ Wo &

(vi) EH$ grS>r Ho$ Ky_Zo H$s {Xem h¡ :
(A) µO
(B) E§Q>r- µO
(C) Amd¥{Îm na {Z^©a H$aVm h¡
(D) dmoëQ>oO Am¡a H$a§Q> na {Z^©a H$aVm h¡

1-344 Page 8

(iv) The frequency range of a guitar is 80 Hz to 1650 Hz. (True/False)

(v) Squawker is used to reproduce the mid-frequencies in a loudspeaker
system. (True/False)

(vi) The unit of sound pressure used for rating microphone is :
(A) Bar
(B) Watt
(C) Pascal
(D) Decibel

(vii) Moving coil loudspeaker is used in _____________.
4. Answer any 5 out of the given 6 questions. 5 1=5
(i) Which type of current is passed through the record head in magnetic
recording ?
(A) DC
(B) AC
(C) Audio signal
(D) RF
(ii) The major components of a Disc Drive Mechanism are ___________
and ___________.
(iii) The storage capacity of a DVD is :
(A) B
(B)
(C)
(D)
(iv) On the vinyl disc, the sound is recorded in the form of grooves on the
disc. (True/False)
(v) The first scientist who developed the idea of sound recording and
reproduction was _____________.
(vi) The direction of rotation of a CD is :
(A) Clockwise
(B) Anti-clockwise
(C) Depends on frequency
(D) Depends on voltage and current

1-344 Page 9 P.T.O.

5. {XE JE 6 àíZm| _| go {H$Ýht 5 Ho$ CÎma Xr{OE & 5 1=5
(i) Y {g½Zb _| ___________ a§J H$m A{YH$V_ à{VeV hmoVm h¡ &
(A) bmb (B) ham
(C) Zrbm (D) nrbm
(ii) Eoåßbr\ ?
(iii) CRT H$s Am§V[aH$ H$moqQ>J \$m°ñ\$moa go ~Zr hmoVr h¡ & (ghr/µJbV)
(iv) __________ A_o[aH$m Ho$ {bE nhbm Q>rdr _mZH$ Wm & (PAL/ NTSC/CCIR-B)
(v) Q>obr{dµOZ Ho$ {bE Am°{S>`mo _m°S>çyboeZ h¡ :
(A) EoåßbrQ>çy>S> _m°S>çyboeZ
(B) \ _m°S>çyboeZ
(C) dopñQ>{O`b _m°S>çyboeZ
(D) \o$µO _m°S>çyboeZ
(vi) LED TV H$m nyU© ê$n _________ h¡ &

6. {XE JE 6 àíZm| _| go {H$Ýht 5 Ho$ CÎma Xr{OE & 5 1=5
(i) _¡½ZoQ´>moZ Am_Vm¡a na _____________ hmoVm h¡ &
(A) ~obZmH$ma
(B) dJm©H$ma
(C) {ÌH$moUr`
(D) Am`VmH$ma
(ii) DTMF ?
(iii) \ H$mbr Am¡a g\o$X bmBZm| H$mo ^oOZo dmbo N>moa go àmá H$aZo dmbo N>moa
VH$ àgm[aV H$aZo H$m H$m_ H$aVr h¡ & (ghr/µJbV)
(iv) ___________ Ho$ gmW
Cn`moJ {H$`m OmVm h¡ &
(A) _mBH«$mo H$åß`yQ>g©
(B) {_Zr H$åß`yQ>g©
(C) _oZ\«o$_ H$åß`yQ>g©
(D) _ëQ>r`yOa {gñQ>åg

1-344 Page 10

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

(i) Y signal has maximum percentage of ___________ colour.
(A) Red (B) Green
(C) Blue (D) Yellow

(ii) What is the purpose of amplifier ?

(iii) The inner coating of CRT is made of phosphor. (True/False)

(iv) The first TV standard for America was _________. (PAL/NTSC/CCIR-B)

(v) Audio modulation for television is :
(A) Amplitude modulation
(B) Frequency modulation
(C) Vestigial modulation
(D) Phase modulation
(vi) Full form of LED TV is ___________.

6. Answer any 5 out of the given 6 questions. 5 1=5
(i) A magnetron is usually ___________ in shape.
(A) Cylindrical
(B) Square
(C) Triangular
(D) Rectangular

(ii) What is the full form of DTMF ?

(iii) FAX machine works to transmit black and white lines from sending
end to receiving end. (True/False)

(iv) The small hand held scanners are widely used with ___________.
(A) Micro computers
(B) Mini computers
(C) Mainframe computers
(D) Multiuser systems

1-344 Page 11 P.T.O.

(v) _mBH«$modod `y{ZQ> _| dmoëQ>oO H$mo Am¡a KQ>mZo Ho$ {bE {H$g CnH$aU H$m Cn`moJ
{H$`m OmVm h¡ ?
(A) W_m}ñQ>oQ>
(B) [abo
(C) aoJwboQ>a
(D) hmB© dmoëQ>oO Q´>m§g\$m°_©a
(vi) ?

IÊS> I $
({df`naH$ àH$ma Ho$ àíZ) (30 A§H$)
5 3
20 30 3 2=6

7. g{H«$` ldU Ho$ Mma MaUm| H$s gyMr ~ZmBE &
8. {H$gr Ho$ ì`{º$Ëd Ho$ {Z_m©U _| ñd-àoaUm _hÎdnyU© h¡ & {Q>ßnUr H$s{OE &
9. H$mo àdoe H$aZo Ho$ MaUm| H$mo {b{IE &
10. {H$Ýht Xmo ~mYmAm| H$mo {b{IE {OÝh| EH$ ì`{º$ H$mo à^mdr CÚ_r ~ZZo _| gm_Zm H$aZm
&
11. AW©ì`dñWm Ho$ {H$Ýht Xmo joÌm| _| h[aV Zm¡H$[a`m| Ho$ _hÎd H$mo g§jon _| g_PmBE &

5 3 20 30 3 2=6

12. {d{^Þ àH$ma H$s ì`mdgm{`H$ ~r_m[a`m| H$mo gyMr~Õ H$s{OE &

13. dy\$a na EH$ g§{jßV {Q>ßnUr {b{IE &

14. ßbo~¡H$ H$s à{H«$`m H$m dU©Z H$s{OE &

15. EZmbm°J Q>obr{dµOZ àUm{b`m| H$s VwbZm _| EMS>rQ>rdr Ho$ _hÎdnyU© {deofVmAm| H$s gyMr
~ZmBE &

16. Q>çyZa na EH$ g§{jßV {Q>ßnUr {b{IE &
1-344 Page 12

(v) Which instrument is used to increase and decrease the voltage in
microwave unit ?
(A) Thermostat
(B) Relay
(C) Regulator
(D) High voltage transformer
(vi) What is the function of toner cartridge ?

SECTION B
(Subjective Type Questions) (30 Marks)

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

7. List out the four steps of active listening.

8. Self-m

9. Write down the steps for inserting a text box in the slide.

10. Write any two barriers faced by an individual in becoming an effective
entrepreneur.

11. Briefly explain the importance of green jobs in any two sectors of the
economy.

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

12. Enlist different kinds of occupational diseases.

13. Write a short note on Woofer.

14. Describe the process of playback.

15. List the important characteristics of HDTV in comparison with analog
television systems.

16. Write a short note on Tuner.

1-344 Page 13 P.T.O.

3 2 30 50 2 3=6

17. Ho$~b Q>rdr {gñQ>_ H$mo g_PmBE &

18. [ {b{IE &
19. bmCS>ñnrH$a Ho$ à{V~mYm Am¡a e{º$ ñVa na EH$ g§{jßV {Q>ßnUr {b{IE &

5 3 50 80 3 4=12

20. {dÚwV AmnmVH$mbrZ à{H«$`mAm| H$s ì`m»`m H$s{OE &
21. H$m~©Z _mBH«$moµ\$moZ H$s H$m`©àUmbr, JwU, Xmof Ed§ AZwà`moJ H$mo g_PmBE &

22. ãbm°H$ AmaoI H$s ghm`Vm go, grS>r/S>rdrS>r ßbo`a Ho$ H$m`©H$mar {gÕm§V H$mo g_PmBE &

23. Q>rdr [agrda H$s Iam~r Ty> Zo Am¡a Cgo R>rH$ H$aZo Ho$ {bE EH$ âbmoMmQ>© ~ZmBE &
24. qàQ>a H$s g_ñ`m-{ZdmaU à{H«$`m H$mo g_PmBE &

1-344 Page 14

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

17. Explain Cable TV system.

18. Write any two types of problems associated with a Recorder/Player.

19. Write a short note on impedance and power level of a Loudspeaker.

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

20. Explain the electrical emergency procedures.

21. Explain the working, merits, demerits and applications of carbon
microphone.

22. With the help of a block diagram, explain the working principle of
CD/DVD Player.

23. Draw a flowchart for fault finding and rectification of TV Receiver.

24. Explain the troubleshooting process of a Printer.

1-344 Page 15 P.T.O.

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