HBSE Class 12 Physics Question Paper 2017 Set A

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

Roll No. SET : A
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 : A) P. T. O.

(2) 2028/(Set : A)
• 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 : A)

(3) 2028/(Set : A)
(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) fo|qr~ vkos'k dk SI ek=d gksrk gS % 1

(A) ,sfEi;j (B) dwykWe

(C) oksYV (D) dksbZ ugha

SI unit of electric charge is :

(A) Ampere (B) Coulomb

(C) Volt (D) None

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

(4) 2028/(Set : A)
(ii) ,d P fo|qr~ vk?kw.kZ okys f}/kzqo dks fo|qr~ {ks= E ls 90° dks.k ij j[kus ls yxus okyk
cy vk?kw.kZ gksxk % 1

(A) PE (B) PE cos θ

(C) PE/sin θ (D) 'kwU;
The torque acting on an electric dipole of dipole moment P placed at
an angle 90° to the electric field E will be :

(A) PE (B) PE cos θ

(C) PE/sin θ (D) Zero

(iii) rkieku esa o`f) ls ,d pkyd dh çfrjks/kdrk % 1

(A) de gksxh

(B) c<+sxh

(C) ogh jgsxh

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

The resistivity of a conductor with increase in temperature :

(A) decreases

(B) increases

(C) remains same

(D) may increase or decrease

2028/(Set : A)

(5) 2028/(Set : A)
(iv) ,d çfrpqEcdh; inkFkZ dh pqEcdh; ço`fÙk gksrh gS % 1

(A) vYi o _.kkRed

(B) vYi o /kukRed

(C) vf/kd o _.kkRed

(D) vf/kd o /kukRed

Magnetic susceptibility of diamagnetic substance is :

(A) small and negative

(B) small and positive

(C) large and negative

(D) large and positive

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

µ0I
(A) µ 0nI (B)
2πr

µ0I
(C) (D) 'kwU;
2r
The magnetic field at the centre of a circular coil of radius r and
carrying current I is given by :

µ0I
(A) µ 0nI (B)
2πr

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

(6) 2028/(Set : A)
µ0I
(C) (D) Zero
2r

(vi) fdlh 1014 Hz vko`fÙk okyh rjax dh rjaxnS?;Z gksxh % 1

(A) 3 × 10 −6 eh0 (B) 3 × 10 6 eh0

(C) 10 6 eh0 (D) dksbZ ugha

The wavelength of a wave with frequency 1014 Hz will be :

(A) 3 × 10 −6 m (B) 3 × 10 6 m

(C) 10 6 m (D) None

(vii),d çdk'k rUrq dh dk;Z iz.kkyh fuHkZj gksrh gS % 1

(A) ijkorZu ij (B) vk?kw.kZ ij

(C) viorZu ij (D) iw.kZ vkarfjd ijkorZu ij

The working of an optical fibre depends upon :

(A) Reflection

(B) Moment

(C) Refraction

(D) Total internal reflection

(viii),d lkekU; ekuo us= ds fy, lqLi"V n`';rk dh vYire nwjh D;k gS \ 1

2028/(Set : A)

(7) 2028/(Set : A)
(A) 25 lseh (B) 25 eh0

(C) 2.5 eh0 (D) 1 eh0

For a normal human eye the least distance of distinct vision is :

(A) 25 cm (B) 25 m

(C) 2.5 m (D) 1 m

(ix) fuEu esa ls fdlds fy, fujks/kh foHko vfry?kq gksxk \ 1

(A) uhyk (B) yky

(C) ihyk (D) gjk

Which of the following stopping potential required is minimum ?

(A) Blue (B) Red

(C) Yellow (D) Green

(x) 100 V ds foHkokarj }kjk Rofjr fdlh bysDVªkWu dh ns-czkWXyh rjaxnS?;Z gksxh % 1

o o
(A) 12.27 A (B) 1.227 A

(C) 1 eh0 (D) 1.227 eh0

de-Broglie wavelength associated with an electron under a potential
difference of 100 V is given by :

o o
(A) 12.27 A (B) 1.227 A

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

(8) 2028/(Set : A)
(C) 1 m (D) 1.227 m

(xi) gkbMªkstu ijek.kq dh vk;uu ÅtkZ gksrh gS % 1

(A) 13.6 J (B) 13.6 eV

(C) 1 eV (D) 10.2 eV

The ionization energy of hydrogen atom is :
(A) 13.6 J (B) 13.6 eV
(C) 1 eV (D) 10.2 eV
(xii) ,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) 2Rh (B) Rh
(C) R /h (D) h /R

The distance to which a TV tower can broadcast program is, given
by (given height of tower h and radius of earth R ) ?
(A) 2Rh (B) Rh
(C) R /h (D) h /R

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

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

What is Coulomb's law ? Write its expression.

3. ,d pkyd ds fy, çfrjks/k o çfrjks/kdrk esa lEcU/k fy[ksaA buesa ls ,d gh ek/;e ds fy,
dkSu-lk ekud cnyrk ugha gS \ 2

2028/(Set : A)

(9) 2028/(Set : A)
Write the relation between resistance and resistivity of a conductor.
Which of these quantities does not change for same material ?

4. fo|qr~ pqEcdh; çsj.k ds fy, QSjkMs ds fu;e fy[ksaA 2

State Faraday's laws of electromagnetic induction.

5. lw{erjaxksa rFkk jsfM;ksrjaxksa ds nks mi;ksx fy[ksaA 2

Write two uses of microwaves and radiowaves.

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

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

7. çdk'k&fo|qr~ mRltZu D;k gksrk gS \ blds fy, vkbaLVhu dk lehdj.k fy[ksaA
2

Define photoelectric emission and write Einstein's photoelectric
equation.

8. AND xsV D;k gksrk gS \ blds fy, lR;eku lkj.kh cukb,A 2

What is AND gate ? Give its truth table.

9. N-izdkj ds v/kZpkyd D;k gksrs gSa \ bUgsa dSls cukrs gSa \ 2

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

10. vk;ke ekMqyu D;k gksrk gS \ fp= dh lgk;rk ls o.kZu djsaA 2
What is amplitude modulation ? Explain with diagram.

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

( 10 ) 2028/(Set : A)
[ y?kq mÙkjh; ç'u ]
[ Short Answer Type Questions ]

11. ,d la/kkfj= dh /kkfjrk D;k gksrh gS \ A o B fcUnqvksa ds chp rqY; /kkfjrk Kkr djsa %
3

5 µF
10 µF
A B
5 µF

What is capacitance of a capacitor ? Calculate equivalent capacitance
between points A and B :

5 µF
10 µF
A B
5 µF

12. ,d ehVjlsrq ds }kjk vKkr çfrjks/k dk eku Kkr djus ds fy, o.kZu djsaA
3

Explain the use of meterbridge for finding an unknown resistance.

13. çdk'k dk /kzqo.k D;k gksrk gS \ ;fn fdlh ek/;e ds fy, /kzqfor dks.k 60° gS] rks viorZukad
fdruk gksxk \ 3

What is polarization of light ? Calculate the refractive index of a
medium if angle of polarization is 60°.

14. ,d la;qDr lw{en'khZ dk fdj.k vkjs[k cuk,¡ rFkk vko/kZu dh ifjHkk"kk fy[ksaA
3

2028/(Set : A)

( 11 ) 2028/(Set : A)
Draw the ray diagram of a compound microscope and define its
magnification.

15. ,d P-N Mk;ksM dk iw.kZ rjax fn"Vdkjh ds :i esa iz;ksx dk o.kZu djsaA
3

Explain the use of P-N diode as full wave rectifier.

[ nh?kZ mÙkjh; ç'u ]

[ Long Answer Type Questions ]

16. ,d lkbDyksVªkWu ds fl)kar ,oa dk;Zfof/k dk o.kZu djsaA 5

Explain the principle and working of a Cylcotron.
vFkok
OR

,d py dqaMyh xSYouksehVj ds fl)kar dk o.kZu djsaA bls ,sehVj esa :ikarfjr djus dk
mYys[k djsaA
What is the principle of a moving coil galvanometer ? How it can be
converted into an ammeter ?

17. ,d A. C. tfu= ds fl)kar ,oa dk;Zfof/k dk o.kZu djsaA 5

Explain the principle and working of A. C. Generator.

vFkok
OR
2028/(Set : A) P. T. O.

( 12 ) 2028/(Set : A)
(a) Lo ,oa vU;ksU; çsjdRo dks ifjHkkf"kr djsaA 3

Define self and mutual inductance.

(b) ,d dqaMyh ds fy, LoçsjdRo Kkr djsa ;fn 10 −2 lsd.M esa /kkjk 2A dh nj ls cnyus

ij 20 V dk fo|qr&okgd cy (emf ) mRiUu gksrk gSA 2

Calculate self-inductance of a coil when current in it changes by 2A

in 10 −2 seconds and emf produced in 20 volts.

18. jsfM;ks,sfDVo {k; ds fu;eksa dk o.kZu rFkk budk mi;ksx djds blds fy, lehdj.k LFkkfir
djsaA 5

Explain the laws of radioactive decay. Derive equation of radioactive
decay using these laws.

vFkok
OR

{k; fLFkjkad o v/kkZ;q dh ifjHkk"kk fy[kdj buesa lEcU/k LFkkfir dhft,A
5

Define decay constant and half-life and derive a relation between them.

S
2028/(Set : A)