HBSE Class 12 Question Paper 2023 Physics

CLASS : 12th (Sr. Secondary) Code No. 228
Series : SS/Annual-2023
Roll No. SET : A
HkkSfrd foKku
PHYSICS
[ Hindi and English Medium ]
ACADEMIC/OPEN
(Only for Fresh/Re-appear/Improvement/Additional Candidates)

Time allowed : 3 hours ] [ Maximum Marks : 70

• Ñi;k tk¡p dj ysa fd bl iz'u&i= esa eqfnzr i`"B 16 rFkk iz'u 20 gSaA
Please make sure that the printed pages in this question paper are 16 in number
and it contains 20 questions.

• iz'u&i= esa nkfgus gkFk dh vksj fn;s x;s dksM uEcj rFkk lsV dks Nk= mÙkj&iqfLrdk ds eq[;&i`"B ij
fy[ksaA

The Code No. and Set on the right side of the question paper should be written by

the candidate on the front page of the answer-book.

• Ñi;k iz'u dk mÙkj fy[kuk 'kq: djus ls igys] iz'u dk Øekad vo'; fy[ksaA

Before beginning to answer a question, its Serial Number must be written.

228/(Set : A) P. T. O.

(2) 228/(Set : A)
• mÙkj&iqfLrdk ds chp esa [kkyh iUuk@iUus u NksMsa+A
Don’t leave blank page/pages in your answer-book.

• mÙkj&iqfLrdk ds vfrfjDr dksbZ vU; 'khV ugha feysxhA vr% vko';drkuqlkj gh fy[ksa vkSj fy[kk mÙkj u
dkVsaA
Except answer-book, no extra sheet will be given. Write to the point and do not
strike the written answer.

• ijh{kkFkhZ viuk jksy ua0 iz'u&i= ij vo'; fy[ksaA jksy ua0 ds vfrfjDr iz'u&i= ij vU; dqN Hkh u
fy[ksa vkSj oSdfYid iz'uksa ds mÙkjksa ij fdlh izdkj dk fu'kku u yxk,¡A
Candidates must write their Roll No. on the question paper. Except Roll No. do not
write anything on question paper and don't make any mark on answers of objective
type questions.

• d`i;k iz'uksa dk mÙkj nsus lss iwoZ ;g lqfuf'pr dj ysa fd iz'u&i= iw.kZ o lgh gS] ijh{kk ds mijkUr bl
lEcU/k esa dksbZ Hkh nkok Lohdkj ugha fd;k tk;sxkA
Before answering the questions, ensure that you have been supplied the correct and
complete question paper, no claim in this regard, will be entertained after
examination.

lkekU; funsZ'k %
(i) ç'u-i= esa dqy 20 ç'u gSAa
(ii) lHkh ç'u vfuok;Z gSAa
228/(Set : A)

(3) 228/(Set : A)
(iii) ç'u la[;k 1 esa 1-1 vadksa ds iUnzg (i-xv) oLrqfu"B ç'u gSAa

(iv) ç'u la[;k 2 ls 9 rd vfry?kq mÙkjh; ç'u gSa rFkk çR;sd ç'u 2 vadksa dk gSA

(v) ç'u la[;k 10 ls 17 rd y?kq mÙkjh; ç'u gSa rFkk çR;sd ç'u 3 vadksa dk gSA

(vi) ç'u la[;k 18 ls 20 rd nh?kZ mÙkjh; ç'u gSa rFkk çR;sd ç'u 5 vadksa dk gSA

(vii) ç'u-i= esa lexz :i ls dksbZ fodYi ugha gSA rFkkfi 5 vadksa okys rhuksa ç'uksa esa vkUrfjd p;u çnku

fd;k x;k gSA ,sls ç'uksa esa ls vkidks fn, x, p;u esa ls dsoy ,d gh ç'u djuk gSA

(viii)dSYD;qysVj ds mi;ksx dh vuqefr ugha gSA vko';d gksus ij] y?kqx.kdh; lkjf.k;ksa dk ç;ksx fd;k tk

ldrk gSA

(ix) tgk¡ vko';d gks vki fuEufyf[kr HkkSfrd fu;rkadksa ds ekuksa dk mi;ksx dj ldrs gSa %

c = 3 × 10 8 m/s µ 0 = 4π × 10 −7 Tm A −1

1
h = 6.63 × 10 −34 JS = 9 × 10 9 Nm2C − 2
4π ∈0

e = 1.6 × 10 −19 C me = 9.1 × 10 −31 kg

General Instructions :

(i) There are 20 questions in all.

(ii) All questions are compulsory.

228/(Set : A) P. T. O.

(4) 228/(Set : A)
(iii) Question number 1 consists of fifteen (i-xv) objective type questions each of
1 mark.

(iv) Question Numbers 2 to 9 are very short answer type questions and carry
2 marks each.

(v) Question Numbers 10 to 17 are short answer type questions and carry
3 marks each.

(vi) Question Numbers 18 to 20 are long answer type questions and carry
5 marks each.

(vii) There is no overall choice. However, an internal choice has been provided in
all three questions of 5 marks each. You have to attempt only one of the given
choice in such questions.

(viii)Use of Calculators is not permitted, if required you may use logarithmic

tables.

(ix) You may use the following values of physical constants whenever
necessary :

c = 3 × 10 8 m/s µ 0 = 4π × 10 −7 Tm A −1

1
h = 6.63 × 10 −34 JS = 9 × 10 9 Nm2C − 2
4π ∈0

e = 1.6 × 10 −19 C me = 9.1 × 10 −31 kg

228/(Set : A)

(5) 228/(Set : A)
[k.M – v

SECTION – A

[ oLrqfu"B iz'u ]

[ Objective Type Questions ]

1. (i) fdlh LFkku ij i`Foh ds pqacdh; {ks= ds {kSfrt rFkk m/okZ/kj ?kVd cjkcj gSaA ml LFkku ij ufr
dks.k dk eku gksxk % 1

(A) 0° (B) 45°

(C) 60° (D) 90°

At a given place the horizontal and vertical components of earth are equal.

The angle of dip at that place will be :

(A) 0° (B) 45°

(C) 60° (D) 90°

(ii) nks ijek.kqvksa ds ijek.kq Øekad leku ijUrq ijek.kq nzO;eku fHkUu gSa] og gksaxs % 1

(A) leLFkkfud (B) leHkkfjd

(C) leU;wVªkWfud (D) buesa ls dksbZ ugha

228/(Set : A) P. T. O.

(6) 228/(Set : A)
Two atoms have the same atomic number but different atomic mass. They

will be :

(A) Isotopes

(B) Isobaric

(C) Isotones

(D) None of these

(iii) izdk'k bysDVªkWuksa ds fy, fujks/kh foHko fuHkZj djrk gS % 1

(A) dsoy vkifrr izdk'k dh vko`fÙk ij

(B) dsoy dSFkksM ds inkFkZ ij
(C) vkifrr izdk'k dh vko`fÙk o dSFkksM ds inkFkZ nksuksa ij
(D) vkifrr izdk'k dh rhozrk ij
The stopping potential for photoelectrons depends upon :

(A) Frequency of incident light only

(B) Material of the cathode only

(C) Both the frequency of incident light and the material of the cathode

(D) Intensity of incident light

228/(Set : A)

(7) 228/(Set : A)
(iv) dejs ds rkieku ij vkarfjd (Intrinsic) v/kZpkydksa esa bysDVªkWu rFkk gksy dh la[;k gksrh gS % 1

(A) cjkcj (B) 'kwU;

(C) vleku (D) vuUr

In intrinsic semi. conductor at room temperature, the numbers of electrons

and holes are :

(A) Equal (B) Zero

(C) Unequal (D) Infinite

(v) lw{e rjaxsa fo|qr~-pqEcdh; rjaxsa gksrh gSa] ftudh rjax ijkl gS % 1

(A) ekbØks gV~tZ (B) esxk gV~tZ

(C) xhxk gV~tZ (D) gV~tZ

Microwaves are the electromagnetic waves with frequency in the range of :

(A) Micro hertz (B) Mega hertz

(C) Giga hertz (D) Hertz

228/(Set : A) P. T. O.

(8) 228/(Set : A)
(vi) D;k fn;s x;s fp= eas lfU/k Mk;ksM D vxzvfHkur gS vFkok mRØe vfHkur gS \ 1
D
+ 5V +2V
R
Is the Junction diode D is forward or reverse biased in the given diagram ?

D
+ 5V +2V
R

(vii) fdlh ukfHkd dh f=T;k R ,oa nzO;eku la[;k A esa laca/k fyf[k,A 1

Write the relation between radius R and mass number A of a nucleus.

(viii);fn A = 1 rFkk B = 1, rks fn;s x;s ykWftd ifjiFk esa Y dk eku Kkr djsaA 1

A
Y
B

If A = 1 and B = 1, find the value of Y in the adjoining logic circuit.
A
Y
B

228/(Set : A)

(9) 228/(Set : A)
(ix) fdlh bysDVªkWu dk nzO;eku m rFkk bl ij e vkos'k gSA ;fn bysDVªkWu V foHkokUrj ls Rofjr fd;k

tk,] rks blls lacaf/kr ns-czkWXyh rjaxnS?;Z dk lw= fyf[k,A 1

The mass of an electron is m and has charge e. If this electron is accelerated

by a potential difference of V, then write the formula for the de-Broglie

wavelength associated with it.

(x) D;k fdjpkWQ ds fu;e a. c. rFkk d. c. nksuksa ds fy, ykxw gksrs gSa \ 1

Are Kirchhoff's rules applicable to both a. c. and d. c. ?

(xi) Tesla is the unit of ………….. . 1

Vslyk ………….. dk ek=d gSA

(xii) ,d NYys ls xqtjus okys pqEcdh; ¶yDl dk eku Q1 ls Q2 rd ,dleku nj ls t le; esa c<+k;k

tkrk gS] rks NYys esa izsfjr fo|qr-~ okgd cy ………….. gksxkA 1

The magnetic flux passing through a ring is increased from Q1 to Q2 at a

constant rate in time t. The value of Induced Electromotive force will

be ………….. .

228/(Set : A) P. T. O.

( 10 ) 228/(Set : A)
(xiii) fuokZr esa nks fcUnq vkos'kksa ds chp fLFkj oS|qr cy F gSA ;fn bu vkos'kksa dks mruh gh nwjh ij ty
¼iSjkoS|qrkad K = 80½ gS] rc muds chp cy gksaxs ………….. A 1

Electrostatic force between two point charges in vacuum is F. If the charge
are kept at the same distance in water (Dielectric constant K = 80), then the
force between them will be ………….. .

(xiv) ………….. pkydrk dh SI ;wfuV gSA 1

………….. is the SI unit of conductivity.

(xv) fo|qr~-pqEcdh; rjaxksa dk eqDr Lisl (Free Space) esa osx ds fy, lac/a k gksxk ………….. A 1

The velocity of electromagnetic waves in free space can be given by the
relation ………….. .

[k.M – c

SECTION – B

[ vfry?kq
vfry?kq mÙkjh; ç'u ]
[ Very Short Answer Type Questions ]

2. in fo|qr~ f}/kzqo vk?kw.kZ dks ifjHkkf"kr dhft,A ;g vfn'k gS ;k lfn'k \ 2

Define the term electric dipole moment. Is it scalar or vector ?

228/(Set : A)

( 11 ) 228/(Set : A)
3. foHkoekih dk D;k fl)kUr gS \ 2

What is the principle of potentiometer ?

4. fdlh LFkku ij pqEcdh; rÙo D;k gksrs gSa \ fdlh ,d dks ifjHkkf"kr dhft,A 2

What are magnetic elements at a place ? Define any one.

5. 14 mH dh daqMyh esa 100 hertz dh a. c. /kkjk izokfgr gks jgh gSA bldk izfr?kkr (Reactance)

fdruk gksxk \ 2

A 100 Hz (hertz) a. c. is flowing in a 14 mH coil. Find its Reactance.

6. lw{e-rjaxksa ,oa xkek-fdj.kksa ds nks-nks mi;ksx fyf[k,A 2

Write two uses each of Microwaves and Gamma rays.

7. ,d ysal ds fy, {kerk dh ifjHkk"kk fyf[k,A 2

Define power of a lens.

8. izdk'k ds dyklac) òksr D;k gSa \ 2

What are coherent sources of light ?

228/(Set : A) P. T. O.

( 12 ) 228/(Set : A)
9. v/kZ rjax fn"Vdkjh dk fp= cuk,a ,oa fuos'k (input) ,oa fuxZr (output) rjaxksa dks n'kkZ,¡A 2

Draw the circuit diagram of Half wave rectifier showing input and output
waves.

[k.M – l

SECTION – C

[ y?kq mÙkjh; ç'u ]

[ Short Answer Type Questions ]

10. OghVLVksu lsrq dk fl)kar fyf[k, vkSj bls fdjpkWQ fu;e dk mi;ksx djrs gq, izfrikfnr dhft,A 3

State Wheatstone bridge principle and deduce it using Kirchhoff's rules.

11. fo|qr~ vuqukn ifjiFk esa xq.koÙkk dkjd dks ifjHkkf"kr dhft,A 3

Define resonance in LCR circuit. Find Power factor of series resonance LCR
circuit.

12. ukekafdr fp= cuk dj la{ksIk esa mPpk;h VªkalQkeZj dk fl)kar le>kb,A 3

Describe briefly with the help of a labelled diagram, principle of step-up
Transformer.

228/(Set : A)

( 13 ) 228/(Set : A)
13. izdk'k dk foorZu D;k gksrk gS \ fdlh ,dy f>jh }kjk foorZu ds fy, rhozrk forj.k xzkQ cukdj

le>kb,A 3

What is diffraction of light ? Explain the intensity distribution graph due to
diffraction from a single slit.

14. vkbaLVhu ds izdk'k-fo|qr~ lehdj.k dk mi;ksx djrs gq,] fujks/kh foHko ij vkifrr fofdj.k dh vko`fÙk
ds izHkko dk o.kZu djsaA 3

Using Einstein's photoelectric equation, explain effect of frequency incident
radiation on stopping potential.

15. nzO;eku {kfr o ukfHkdh; ca/ku-ÅtkZ dks ifjHkkf"kr dhft,A fdlh AZ X ukfHkd ds fy, nzO;eku {kfr o
ukfHkdh; ca/ku-ÅtkZ dk eku fyf[k,A 3

A
Define mass defect and nuclear binding energy. For a nucleus X , write the
Z
value of mass defect and nuclear binding energy.

16. fdlh jsfM;ks,fDVo rÙo ds fy, v/kZ-vk;q o fo?kVu-fLFkjkad ds inksa dks ifjHkkf"kr dhft, rFkk muds chp
laca/k fyf[k,A 3

Define the term Half-life period and decay constant of a radioactive element.
Write the relation between them.

228/(Set : A) P. T. O.

( 14 ) 228/(Set : A)
17. Mksfiax D;k gksrh gS \ N-Vkbi o P-Vkbi esa nks vUrj fyf[k,A 3

What is doping ? State two differences between N-type and P-type.

[k.M – n
SECTION – D

[ nh?kZ mÙkjh; ç'u ]

[ Long Answer Type Questions ]

18. la/kkfj= fdls dgrs gSa \ ,d lekUrj iê la/kkfj= ds IysVksa ds chp ijkoS|qrkad K dk ek/;e vkaf'kd :i
ls Hkjk gqvk gSA bldh /kkfjrk dk O;atd izkIr dhft,A vko';d fp= cukb,A 5

What is a capacitor ? Derive an expression for the capacitance of a parallel plate

capacitor in which a dielectric medium of dielectric constant K partially fills the

space between the plates. Draw the necessary diagram.

vFkok

OR

fo|qr~ ¶yDl dh ifjHkk"kk nhft,A D;k ;g lfn'k jkf'k gS vFkok vfn'k \ 5

Define Electric flux. Is it a scalar or a vector quantity.

228/(Set : A)

( 15 ) 228/(Set : A)
xkml ds fu;e dk mi;ksx djds vkos'k ?kuRo λ c/m dh fdlh lh/kh ,dleku vkosf'kr vuUr js[kk
ds dkj.k fo|qr~ {ks= (E ) ds fy, O;atd O;qRiUu dhft,A
Use Gauss's law to derive the expression for the electric field (E ) due to a
straight uniformly charged infinite line of charge density λ c/m.

19. nks lekarj pkydksa ds chp yxus okys cy ds fy, O;atd fudkfy,] ftuesa /kkjk ,d gh fn'kk esa cg jgh
gksA vr% ,d ,sfEi;j dks ifjHkkf"kr dhft,A 5

Derive an expression for the force between two parallel straight conductors
carrying current in the same direction. Hence define one ampere.

vFkok

OR

,d py dqaMyh xSYosuksehVj ds fl)kUr dk o.kZu djsaA bls ,sehVj esa dSls cnyk tkrk gS \ vko';d fp=
cukb;sA 5

Explain the principle of a moving coil Galvanometer. How can it be converted

into an ammeter ? Draw necessary diagram.

20. gkbxsu ds fl)kUr dks ifjHkkf"kr djsa ,oa ijkorZu ds fu;e dks rjax fl)kar ds vk/kkj ij fl) djsaA 5

State Huygens principle and prove the law of reflection on the basis of wave
theory.

228/(Set : A) P. T. O.

( 16 ) 228/(Set : A)
vFkok

OR

fdlh la;qDr lw{en'khZ esa izfrfcac cuus dk ukekafdr fdj.k vkjs[k cukb,A bldh vko/kZu {kerk dks
ifjHkkf"kr dhft, rFkk blds fy, O;atd fyf[k,A 5

Draw a labelled ray diagram showing the formation of image in a compound
microscope. Define its magnifying power and write expression for it.

S

228/(Set : A)