HBSE Class 12 Physics Question Paper 2017 Set B

CLASS : 12th (Sr. Secondary) Code No. 2028
Series : SS-M/2017

Roll No. SET : B
HkkSfrd foKku
PHYSICS
[ Hindi and English Medium ]
ACADEMIC /OPEN
(Only for Fresh Candidates)
(Evening Session)
Time allowed : 3 hours ] [ Maximum Marks : 60
• Ñi;k tk¡p dj ysa fd bl iz'u&i= esa eqfnzr iz'u 18 gSaA
Please make sure that the printed question paper are contains 18
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.
• 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.

2028/(Set : B) P. T. O.

(2) 2028/(Set : B)
• 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 18 ç'u gSaA
(ii) lHkh ç'u vfuok;Z gSAa
(iii) ç'u la[;k 1 esa 1-1 vadksa ds ckjg (i-xii) cgqfodYih; ç'u gSAa çR;sd ç'u ds pkj laHkkfor
mÙkj gSA vkidks blesa loksZÙke mÙkj pquuk gS vkSj ml mÙkj dks viuh mÙkj&iqfLrdk esa fy[kuk
gSA
(iv) ç'u la[;k 2 ls 10 rd vfry?kq mÙkjh; ç'u gSa rFkk çR;sd ç'u 2 vadksa dk gSA

(v) ç'u la[;k 11 ls 15 rd y?kq mÙkjh; ç'u gSa rFkk çR;sd ç'u 3 vadksa dk gSA

(vi) ç'u la[;k 16 ls 18 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
General Instructions :
(i) There are 18 questions in all.
(ii) All questions are compulsory.
(iii) Question number 1 consists of twelve (i-xii) multiple choice questions
each of 1 mark. Each question has four possible answers. You have
to select best answers out of these and write in your answer-sheet.

2028/(Set : B)

(3) 2028/(Set : B)
(iv) Question Numbers 2 to 10 are very short answer type questions and
carry 2 marks each.
(v) Question Numbers 11 to 15 are short answer type questions and
carry 3 marks each.
(vi) Question Numbers 16 to 18 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.

[ cgqfodYih; iz'u ]

[ Multiple Choice Type Questions ]

1. (i) ;fn ,d bysDVªkWu 1 oksYV ds foHkokarj esa Rofjr gks] rks ns-czkWXyh rjaxnS?;Z gksxh % 1
(A) 1 eh0 (B) 1.227 eh0
o o
(C) 12.27 A (D) 1.227 A

An electron is moving under a potential difference of 1 volt, what
will be the de-Broglie wavelength ?
(A) 1 m (B) 1.227 m
o o
(C) 12.27 A (D) 1.227 A

(ii) gkbMªkstu ijek.kq dk vk;uu foHkokarj gksrk gS % 1
(A) 13.6 V (B) 13.6 J
(C) 13.6 eV (D) 1 eV

2028/(Set : B) P. T. O.

(4) 2028/(Set : B)
The ionization energy of hydrogen atom is :

(A) 13.6 V (B) 13.6 J

(C) 13.6 eV (D) 1 eV
(iii) ,d TV Vkoj dh Å¡pkbZ h gS blls fdruh nwjh rd çlkj.k fd;k tk ldrk gS] ;fn
i`Foh dh f=T;k R gS \ 1

(A) Rh (B) 2Rh

(C) 2Rh (D) Rh

A TV tower is of height h, the distance upto which it can broadcast
program will be (Given radius of earth : R) :

(A) Rh (B) 2Rh

(C) 2Rh (D) Rh

(iv) ,d iw.kZ vkarfjd fizTe dk;Z djrk gS % 1

(A) iw.kZ vkarfjd ijkorZu ij

(B) ijkorZu ij

(C) viorZu ij

(D) dksbZ ugha

The working of a totally reflecting prism is based upon :

(A) Total internal reflection

(B) Reflection

2028/(Set : B)

(5) 2028/(Set : B)
(C) Refraction

(D) None of these

(v) ,d lkekU; O;fDr ds fy, lqLi"V n`';rk dh vYire nwjh gksrh gS % 1

(A) 25 eh0 (B) 0.25 eh0

(C) 2.5 lseh (D) 1 eh0

The least distance of distint vision of a normal human eye is :

(A) 25 m (B) 0.25 m
(C) 2.5 cm (D) 1 m

(vi) fuEu esa ls fdlds fy, fujks/kh foHko lcls vf/kd gksxk \

1

(A) yky (B) gjk

(C) ihyk (D) uhyk

For which of the following stopping potential required is maximum
?

(A) Red (B) Green

(C) Yellow (D) Blue

(vii) foHkokarj dk SI ek=d gksrk gS % 1

(A) vkse (B) dwykWe

(C) oksYV (D) ,sfEi;j

2028/(Set : B) P. T. O.

(6) 2028/(Set : B)
SI unit of electrostatic potential is :

(A) Ohm (B) Coulomb

(C) Volt (D) Ampere

(viii),d P fo|qr~ vk?kw.kZ okys f}/kzqo dks fo|qr~ {ks= E ds lekarj j[kus ij yxus okyk cy
vk?kw.kZ gksxk % 1

(A) PE (B) PE cos θ

(C) 'kwU; (D) dksbZ ugha

The torque acting on an electric dipole of dipole moment P placed
parallel to an electric field E will be : 1

(A) PE (B) PE cos θ

(C) Zero (D) None

(ix) ,d v/kZpkyd dh çfrjks/kdrk rkieku c<+kus ij % 1

(A) c<+sxh

(B) de gksxh

(C) ogh jgsxh

(D) c<+ ;k ?kV ldrh gS

The resistivity of a semiconductor with increase in temperature :

(A) increases

(B) decreases

2028/(Set : B)

(7) 2028/(Set : B)
(C) remains same

(D) may increase or decrease

(x) ,d vuqpqEcdh; inkFkZ dh pqEcdh; ço`fÙk gksrh gS % 1

(A) vYi o /kukRed

(B) vYi o _.kkRed

(C) vf/kd o /kukRed

(D) vf/kd o _.kkRed

Magnetic susceptibility of a paramagnetic substance is :

(A) small and positive

(B) small and negative

(C) large and positive

(D) large and negative

(xi) /kkjk I çokfgr djus okys r f=T;k ds o`Ùkkdkj ik'k ds dsUæ ij pqEcdh; cy gksxk % 1

(A) 'kwU; (B) µ 0nI

µ0I µ0I
(C) (D)
2πr 2r

The magnetic field at the centre of a circular coil of radius r and
carrying current I, is given by :

2028/(Set : B) P. T. O.

(8) 2028/(Set : B)
(A) Zero (B) µ 0nI

µ0I µ0I
(C) (D)
2πr 2r

(xii) fdlh 3 × 1013 Hz vko`fÙk okyh rjax dh rjaxnS?;Z gksxh % 1

(A) 105 eh0 (B) 3 × 105 eh0

(C) 10 −5 eh0 (D) dksbZ ugha

The wavelength of a wave having frequency 3 × 1013 Hz will be :

(A) 105 m (B) 3 × 105 m

(C) 10 −5 m (D) None

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

2. fo|qr~&pqEcdh; çsj.k ds fy, ysat+ dk fu;e fy[ksaA 2

What is Lenz's law for electromagnetic induction ?

3. jsfM;ks&rjaxksa rFkk X-fdj.kksa ds nks
nks-nks mi;ksx fy[ksaA 2

Write two uses each of radiowaves and X-rays.

4. ,d ysal ds fy, Qksdl nwjh dh ifjHkk"kk fy[ksa rFkk bldk ysal dh {kerk ds lkFk lEcU/k
fy[ksaA 2

Define focal length of a lens and give its relation with power of the lens.

5. çdk'k&fo|qr~ mRltZu D;k gksrk gS \ Fkzs'kksYM vko`fÙk dh ifjHkk"kk fy[ksaA
2

2028/(Set : B)

(9) 2028/(Set : B)
What is photoelectric emission ? Define threshold frequency for it.

6. OR }kj D;k gksrk gS \ blds fy, lR;eku lkj.kh cuk,¡A 2

What is OR gate ? Write its truth table.

7. P-izdkj ds v/kZpkyd D;k gksrs gSa \ bUgsa dSls cuk;k tkrk gS \ 2

What are P-type semiconductors ? How they are formed ?

8. vko`fÙk ekMqyu D;k gksrk gS \ fp= dh lgk;rk ls le>kb,A 2
What is frequency modulation ? Explain with diagram.

9. vkse dk fu;e D;k gS \ bldk lw= fy[ksaA 2

What is Ohm's law ? Write its relation.

10. dwykWe ds fu;e dh ifjHkk"kk fy[kdj o.kZu djsaA 2

State and explain Coulomb's law.

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

11. pkyd ds çfrjks/k dh ifjHkk"kk fy[ksa rFkk X o Y fcUnqvksa ds e/; rqY; çfrjks/k Kkr djsa %
3
2Ω
1Ω 2Ω
2Ω
X Y

2028/(Set : B) 4Ω P. T. O.

( 10 ) 2028/(Set : B)

Define resistance of a conductor and calculate equivalent resistance
between points X and Y :
2Ω
1Ω 2Ω
2Ω
X Y

4Ω

12. ,d lekarj ifV~Vdk la/kkfj= dh /kkfjrk ds fy, laca/k fy[ksa rFkk /kkfjrk ij ijkoS|qr ds çHkko
dk o.kZu djsaA 3
Write expression for capacitance of a parallel plate capacitor and
explain the effect of dielectrics on capacitance.

13. ,d [kxksyh; nwjn'khZ dk fdj.k vkjs[k cuk,¡ rFkk vko/kZu dh ifjHkk"kk nsaA
3
Draw the ray diagram of an astronomical telescope and define its
magnification.

14. ,d VªkfUtLVj dk ,sfEIyQk;j ¼izo/kZd½ ds :i esa mi;ksx dk o.kZu djsaA
3

Explain the use of transistor as an amplifier.

15. ,d fp= }kjk ijkorZu ls çdk'k&/kzqo.k dks le>kb, rFkk /kzqfor&dks.k dh ifjHkk"kk fy[ksaA
3

Explain polarization of light by reflection with a diagram. Define angle
of polarization.

2028/(Set : B)

( 11 ) 2028/(Set : B)
[ nh?kZ mÙkjh; ç'u ]

[ Long Answer Type Questions ]

16. (a) Loçsj.k rFkk LoçsjdRo&xq.kkad dh ifjHkk"kk fy[ksaA 3

Define self-induction and the coefficient of self-inductance.

(b) fdlh 10 −2 H LoçsjdRo dh dqaMyh esa fo|qr~ /kkjk 20A çfr lsd.M dh nj ls cnyrh
gS] rks mlesa mRiUu fo|qr&~ okgd cy (emf) Kkr djsaA 2

Calculate the emf (electromotive force) induced in a coil of self-
inductance 10 −2 H , when current in it changes at the rate of 20A
per second.

vFkok
OR

,d VªkaLQkeZj ds fl)kUr ,oa dk;Zfof/k dk o.kZu djsaA 5

Explain the principle and working of a transformer.

17. jsfM;ks/kfeZrk D;k gksrh gS \ jsfM;ks,sfDVo {k; ds fu;eksa dk o.kZu djsa rFkk lehdj.k fy[ksaA
5

What is radioactivity ? Explain laws of radioactive decay and write
equation of radioactive decay.

vFkok
OR

ukfHkdh; fo[k.Mu ,oa ukfHkdh; lay;u dh foLrkjiwoZd O;k[;k djsaA izR;sd dk ,d mnkgj.k
nhft,A 5

2028/(Set : B) P. T. O.

( 12 ) 2028/(Set : B)
Explain nuclear fission and nuclear fusion in detail. Give one example
of each.

18. ,d py dqaMyh xSYouksehVj ds fl)kar dk o.kZu djsaA bls oksYVehVj esa dSls cnyk tk ldrk
gS \ 5

Explain the principle of a moving coil galvanometer. How it can be
converted into a voltmeter ?
vFkok
OR

,d lkbDyksVªkWu dh dk;Zfof/k dk fp= dh lgk;rk ls o.kZu djsaA bysDVªkWu dks blls Rofjr
D;ksa ugha fd;k tk ldrk gS \ 5

Explain the working of a cyclotron with the help of diagram. Why
electron cannot be accelerated using it ?

S

2028/(Set : B)