HBSE Class 12 Question Paper 2019 Physics

CLASS : 12th (Sr. Secondary) Code No. 4328
Series : SS-M/2019

Roll No. SET : A

HkkSfrd foKku
PHYSICS
[ Hindi and English Medium ]
ACADEMIC/OPEN
(Only for Fresh/Re-appear Candidates)

Time allowed : 3 hours ] [ Maximum Marks : 70
• Ñi;k tk¡p dj ysa fd bl iz'u&i= esa eqfnzr i`"B 15 rFkk
iz'u 21 gSaA
Please make sure that the printed pages in this
question paper are 15 in number and it contains
21 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.

4328/(Set : A) P. T. O.

(2) 4328/(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
Candidates must write their Roll Number on the
question paper.

• 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 21 ç'u gSaA

(ii) lHkh ç'u vfuok;Z gSAa
(iii) ç'u la[;k 1 esa 1-1 vadksa ds pkSng (i-xiv) oLrqfu"B ç'u
gSaA

4328/(Set : A)

(3) 4328/(Set : A)
(iv) ç'u la[;k 2 ls 11 rd vfry?kq mÙkjh; ç'u gSa rFkk çR;sd
ç'u 2 vadksa dk gSA
(v) ç'u la[;k 12 ls 18 rd y?kq mÙkjh; ç'u gSa rFkk çR;sd
ç'u 3 vadksa dk gSA
(vi) ç'u la[;k 19 ls 21 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 21 questions in all.
(ii) All questions are compulsory.

4328/(Set : A) P. T. O.

(4) 4328/(Set : A)
(iii) Question number 1 consists of fourteen (i-xiv)
objective type questions each of 1 mark.
(iv) Question Numbers 2 to 11 are very short
answer type questions and carry 2 marks
each.
(v) Question Numbers 12 to 18 are short answer
type questions and carry 3 marks each.
(vi) Question Numbers 19 to 21 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

4328/(Set : A)

(5) 4328/(Set : A)
[ oLrqfu"B iz'u ]
[ Objective Type Questions ]

1. (i) vkos'kksa ds Hkwfe ds lkFk caVu dh izfØ;k dks …………..
dgrs gSaA 1

Process of sharing the charges with the earth

is called as ………….. .

(ii) ∈0 ¼fuokZr dh fo|qr~'khyrk½ dk SI ek=d gS % 1

(A) C −2N 1m −2 (B) C 2N −1m −2

(C) N 1C 2m −2 (D) N −1C 2m 2

SI unit of ∈0 (permittivity of free space) is :

(A) C −2N 1m −2 (B) C 2N −1m −2

(C) N 1C 2m −2 (D) N −1C 2m 2

(iii) fuokZr esa fo|qr~ {ks= 'E' ds ÅtkZ ?kuRo dk O;atd fyf[k,A1

Write the expression for energy density of

electric field 'E' in free space.

4328/(Set : A) P. T. O.

(6) 4328/(Set : A)
(iv) rkieku c<+kus ij] ,d v/kZpkyd dh izfrjks/kdrk % 1

(A) ?kVrh gS

(B) c<+rh gS

(C) ?kV ;k c<+ ldrh gS
(D) mruh gh jgrh gS

With the increase of temperature, the
resistivity of a semiconductor :

(A) Decreases
(B) Increases

(C) May increase or decrease

(D) Does not change
(v) ,d 2 kΩ ds izfrjks/kd ds fljksa ds e/; 4 V dk foHkokarj
gS] rks mlesa fdruh fo|qr~ /kkjk izokfgr gksxh \ 1

How much current flows through a 2 kΩ
resistor when a potential difference of 4 V is
applied across its ends ?

(vi) ,d iw.kZ izfrpqacdh; inkFkZ dh vkisf{kd pqacd'khyrk dk
eku D;k gksrk gS \ 1

What is the value of relative magnetic
permeability of perfectly diamagnetic
substance ?

4328/(Set : A)

(7) 4328/(Set : A)
(vii) ,d 'kq) /kkfjrh; ifjiFk dk 'kfDr xq.kkad gksrk gS % 1

(A) 1 (B) 2
1
(C) (D) 'kwU;
2
The power factor for a purely capacitive circuit
is :
(A) 1 (B) 2
1
(C) (D) Zero
2

(viii)lsY;qyj Qksuksa esa vR;qP; vko`fÙk (UHF) cSaM dh fdl
fo|qr~-pqacdh; rjax dk mi;ksx djds /ofu lans'kksa ds
vknku-iznku dh O;oLFkk dh tkrh gS \ 1

Which electromagnetic wave are used in
cellular phones to transmit voice
communication in the Ultra High Frequency
(UHF) band ?

(ix) dsUnzd dh [kkst fdlus dh \ 1

(A) FkkWelu us (B) cksj us

(C) jnjQksMZ us (D) ns czkWXyh us

Who discovered the nucleus ?

(A) Thomson (B) Bohr

(C) Rutherford (D) de Broglie
4328/(Set : A) P. T. O.

(8) 4328/(Set : A)
(x) jsfM;ks,sfDVo inkFkZ dh lfØ;rk ¼,sfDVork½ dk SI ek=d
D;k gksrk gS \ 1

What is SI unit of activity of Radioactive
Substance ?

(xi) bUnz/kuq"k dh ifj?kVuk gksrh gS % 1

(A) ijkorZu ls (B) viorZu ls

(C) fo{ksi.k ls (D) bu lcls

Rainbow is a phenomenon due to :
(A) Reflection (B) Refraction

(C) Dispersion (D) All of these

(xii)fdlh fcUnq òksr ls vilfjr izdk'k esa rjaxkxz dh vkÑfr
D;k gS \ 1

What is the shape of wavefront for the light
diverging from a point source ?

(xiii)izdkf'kr ladsrksa ds lalwpu esa mi;ksx gksus okys
vkWIVksbysDVªkWfud ;qfDr dk uke D;k gS \ 1

Name the optoelectronic device used to
detect optical signals.

(xiv),d bysDVªkWfud lapkj.k O;oLFkk esa {kh.krk D;k gksrh gS \ 1

In an electronic communication system,
what is attenuation ?

4328/(Set : A)

(9) 4328/(Set : A)
[ vfry?kq
vfry?kq mÙkjh; ç'u ]
[ Very Short Answer Type Questions ]

2. 2 pF, 3 pF vkSj 4 pF /kkfjrk okys rhu la/kkfj= ik'oZØe esa
tksM+s x, gSaA ;fn la;kstu dks 100 V ds laHkj.k ls tksM+ ns]a rks
izR;sd la/kkfj= ij vkos'k Kkr dhft,A 2

Three capacitors of capacitances 2 pF, 3 pF and
4 pF are connected in parallel. Determine the
charge on each capacitor, if the combination is
connected to a 100 V supply ?

3. fdj[kksQ dk ik'k ¼ywi½ fu;e D;k gS \ 2

What is Kirchhoff's loop rule ?

4. Hk¡oj /kkjkvksa ds pkj vuqiz;ksx crkb,A 2

Name four applications of Eddy currents.

5. QSjkMs ds fo|qr~ pqacdh; izsj.k ds fu;e fyf[k,A 2

State Faraday's Law of Electromagnetic Induction.

6. ,d jsfM;ks 7.5 MHz ls 12 MHz cSaM ds fdlh LVs'ku ls
leLofjr gks ldrk gSA laxr rjaxnS?;Z D;k gksxh \ 2

A radio can tune into any station in the 7.5 MHz
to 12 MHz band. What is corresponding
wavelength band ?

4328/(Set : A) P. T. O.

( 10 ) 4328/(Set : A)
7. ,d 0.040 kg nzO;eku dk cqysV tks 1.0 km/sec dh pky
ls py jgk gS] mldk ns czkWXyh rjaxnS?;Z fdruh gksxh \ 2
What is de Broglie wavelength of a bullet of mass
0.040 kg travelling at a speed of 1.0 km/sec ?

8. _.kkRed chVk {k; esa gksus okyh ukfHkdh; izfØ;k D;k gS \
210
83Bi ds bl {k; dh ukfHkdh; izfØ;k fyf[k,A 2

What is basic nuclear process underlying
β− decay ? Write nuclear reaction of this decay
210
for 83Bi .

9. ,d tsuj Mk;ksM dk I-V vfHky{k.k cukb,A oksYVrk fu;a=d ds
:i esa tsuj Mk;ksM dk vkjs[k [khapsA 2

Draw the I-V characteristics of a Zener diode.
Also sketch the circuit diagram of Zener diode as
a voltage regulator.

10. fn;s x;s ifjiFk dh lR;rk lkfj.kh fyf[k,A 2

Y

Write the truth table for given circuit.

Y

4328/(Set : A)

( 11 ) 4328/(Set : A)
11. lapkj O;oLFkk dk CykWd vkjs[k cukb,A 2

Draw Block diagram of Communication System.

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

12. ijek.kq ds cksj ekWMy dh rhu vfHkx`ghrksa dk foe'kZ dhft,A 3

Discuss three basic postulates of Bohr's model

of atom.

13. izdk'k fo|qr~ izHkko D;k gksrk gS \ izdk'k fo|qr~ /kkjk ij izdk'k
dh rhozrk dh foospuk dhft,A 3

What is photoelectric effect ? Discuss the effect

of intensity of light on photoelectric current.

14. ijkorZu ds }kjk /kzqo.k D;k gksrk gS \ czwLVj ds fu;e dk
O;atd izkIr dhft,A 3

What is polarization by reflection ? Deduce

Brewster Law ?

4328/(Set : A) P. T. O.

( 12 ) 4328/(Set : A)
15. ,d Js.khc) L-C-R ifjiFk] ftlesa R = 44 Ω] C = 8 µF
rFkk L = 50 H gS] dks ,d ifjorhZ vko`fÙk 220 V ac vkiwfrZ
ls tksM+k x;k gSA vuqukn dh voLFkk esa dks.kh; vko`fÙk] izfrck/kk
rFkk /kkjk dh x.kuk dhft,A 3

A series L-C-R circuit with R = 44 Ω] C = 8 µF and

L = 50 H is connected to a variable frequency

220 V ac supply. Calculate angular frequency,

impedance and current at resonance condition.

16. ,sfEi;j ds ifjiFkh; fu;e dks ifjHkkf"kr dhft,A ,d vuUr
rkj esa izokfgr gksus okyh /kkjk I ds dkj.k r nwjh ij yxus okys
pqacdh; {ks= dk O;atd fyf[k,A bl pqacdh; {ks= dh fn'kk Kkr
djus ds fy;s fdl fu;e dk mi;ksx djsaxs \ 3

Define ampere circuital law ? Write expression

for magnetic field at a distance r from a straight

infinite wire carrying current I. Which rule is

used to determine the direction of this magnetic

field ?

4328/(Set : A)

( 13 ) 4328/(Set : A)
17. ,d foHkoekih ds fl)kUr dk o.kZu dhft,A nks lsyksa ds fo|qr~
okgd cyksa dh rqyuk ds fy, ukekafdr ifjiFk cukb;sA 3

Explain the principle of Potentiometer. Draw the

labelled circuit diagram for comparing of emf of

two cells ?

18. ,d leku vkosf'kr irys xksyh; [kksy ds dkj.k [kksy ds ckgj
fLFkr fcUnq ij fo|qr~ {ks= Kkr dhft,A 3

Find expression for electric field intensity due to

a uniformly charged thin spherical shell at a

point outside the shell.

[ nh?kZ mÙkjh; ç'u ]
[ Long Answer Type Questions ]

19. pqacdh; 'kSfFkY; ik'k dks of.kZr dhft,A blds D;k vuqiz;ksx
gSa \ 4+1=5

Explain the magnetic hysteresis loop ? What are

its uses ?

4328/(Set : A) P. T. O.

( 14 ) 4328/(Set : A)
vFkok
OR

,d py dq.Myh xSYosuksehVj ds fl)kUr dk o.kZu dhft,A
bldks ,d ,sehVj esa dSls ifjofrZr fd;k tk ldrk gS \ 5

Explain the principle of moving coil
galvanometer ? How it can be converted to an
ammeter ?

20. fdlh [kxksyh; nwjchu ls izfrfcac cuus dk ukekafdr fdj.k
vkjs[k cukb;sA bldh vko/kZu {kerk dks ifjHkkf"kr dhft, rFkk
blds fy, O;atd fyf[k,A 2+2+1=5

Draw a labelled ray diagram showing the image
formation in an astronomical telescope. Define
its magnifying power and write expression for it.

vFkok
OR

;ax ds f}f>jh iz;ksx esa fÝat pkSM+kbZ dk O;atd Kkr dhft,A 5

Find out the expression for Fringe width in
Young's double slit experiment.

4328/(Set : A)

( 15 ) 4328/(Set : A)
21. fdlh n-p-n VªkaftLVj ds CE foU;kl esa vfHkyk{kf.kd ds
v/;;u ds fy, ifjiFk vkjs[k cukb;sA bl foU;kl ds fuos'k
rFkk fuxZr vfHkyk{kf.kd ds vkjs[k [khapAs /kkjk izo/kZd xq.kkad dks
ifjHkkf"kr dhft,A 2+1+1+1=5

Draw a circuit diagram to study characteristics
of n-p-n transistor in CE configuration. Draw
the sketch of input and output characteristics of
this configuration. Define current amplification
factor ?

vFkok
OR

,d p-n-p VªkaftLVj dk flEcy cukb,A p-n-p VªkaftLVj dh
ck;flax n'kkZb;s rFkk blds dk;Z dk o.kZu dhft,A
Draw the symbol of a p-n-p transistor. Show the
biasing of a p-n-p transistor and explain the
transistor action.

S
4328/(Set : A) P. T. O.