HBSE Class 12 Question Paper 2025 Physics

CLASS : 12th (Sr. Secondary) Code No. 2229
Series : SS/Annual Exam.-2025
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 24 rFkk iz'u 35 gSaA
Please make sure that the printed pages in this question paper are 24 in number
and it contains 35 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 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.

2229/(Set : A) P. T. O.

(2) 2229/(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) bl ç'u-i= esa dqy 35 ç'u gS]a ftUgsa ik¡p [k.Mksa % v] c] l] n rFkk ; esa ck¡Vk x;k gS %
[k.M – v esa ç'u la[;k 1 ls 18 rd 1 vad okys oLrqfu"B ç'u gSAa funs'Z kkuqlkj bu ç'uksa ds mÙkj
nhft,A
[k.M – c esa ç'u la[;k 19 ls 25 rd 2 vadksa okys vfry?kq mÙkjh; ç'u gSAa
[k.M – l esa ç'u la[;k 26 ls 30 rd 3 vadksa okys y?kq mÙkjh; ç'u gSAa
[k.M – n esa ç'u la[;k 31 ls 33 rd 5 vadksa okys nh?kZ mÙkjh; ç'u gSAa
[k.M – ; esa ç'u la[;k 34 ,oa 35 4 vadksa okys dsl LVMh vk/kkfjr ç'u gSAa

(ii) lHkh ç'u vfuok;Z gSAa
(iii) ç'u-i= esa lexz :i ls dksbZ fodYi ugha gSA rFkkfi [k.M c] l] n vkSj ; ds dqN ç'uksa esa vkarfjd
p;u çnku fd;k x;k gSA ,sls ç'uksa esa vkidks fn, x, p;u esa ls dsoy ,d gh ç'u djuk gSA
(iv) dSy~D;qysVj ds mi;ksx dh vuqefr ugha gSA
(v) tgk¡ vko';d gks vki fuEufyf[kr HkkSfrd fu;rkadksa ds ekuksa dk mi;ksx dj ldrs gSa %
c = 3 × 108 m/s µ 0 = 4π × 10 −7 Tm A −1

1
h = 6.63 × 10 −34 Js = 9 × 10 9 Nm 2C − 2
4π ∈0

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

2229/(Set : A)

(3) 2229/(Set : A)
General Instructions :

(i) This question-paper consists of 35 questions, which are divided into five
Sections : A, B, C, D, & E :
Section–A consists of Question Nos. 1 to 18 objective type questions of 1
mark each. Answer these questions as per instructions.

Section–B consists of Question Nos. 19 to 25 very short answer type
questions of 2 marks each.

Section–C consists of Question Nos. 26 to 30 short answer type questions of
3 marks each.

Section–D consists of Question Nos. 31 to 33 long answer type questions of
5 marks each.

Section–E consists of Question Nos. 34 & 35 case study based questions of
4 marks each.

(ii) All questions are compulsory.
(iii) There is no overall choice. However, an internal choice has been provided in
some questions of Section – B, C, D and E. You have to attempt only one of
the given choice in such questions.
(iv) Use of Calculators is not permitted.
(v) You may use the following values of physical constants whenever
necessary :

c = 3 × 108 m/s µ 0 = 4π × 10 −7 Tm A −1

1
h = 6.63 × 10 −34 Js = 9 × 10 9 Nm 2C − 2
4π ∈0
e = 1.6 × 10 −19 C me = 9.1 × 10 −31 kg

2229/(Set : A) P. T. O.

(4) 2229/(Set : A)
[k.M – v
SECTION – A

[ oLrqfu"B iz'u ]

[ Objective Type Questions ]

fuEufyf[kr cgqfodYih; ç'uksa ds lgh fodYi pqfu, %

Select the correct option of the following multiple choice questions :

1. ,dleku fo|qr {ks= esa fo|qr f}/kzqo dk dkSu-lk vfHkfoU;kl fLFkj larqyu esa dgk tkrk gS \ 1

(A) θ=0 (B) θ = 90

(C) θ = 120 (D) θ = 180

What orientation of an electric dipole in uniform electric field is said to be in
stable equilibrium ?

(A) θ=0 (B) θ = 90

(C) θ = 120 (D) θ = 180

2. tc ,d rkacs ds rkj dh yackbZ dks mlds vuqçLFk-dkV ds {ks=Qy dks leku j[krs gq, nksxquk dj fn;k
tkrk gS] rks bldk çfrjks/k % 1

(A) nksxquk gks tkrk gS (B) vk/kk gks tkrk gS

(C) dksbZ ifjorZu ugha gksrk (D) pkj xquk gks tkrk gS

2229/(Set : A)

(5) 2229/(Set : A)
When the length of a copper wire is doubled keeping its area of cross-section
same its resistance is :
(A) doubled (B) half
(C) no change (D) four times

3. ,d vkosf'kr d.k pqacdh; {ks= esa pqacdh; cy js[kkvksa ds yacor ços'k djrk gSA vkosf'kr d.k dk iFk
gksxk % 1

(A) o`Ùkkdkj (B) nh?kZo`Ùk
(C) lh/kh js[kk (D) dqaMykdkj
A charged particle enter in a magnetic field perpendicular to the magnetic lines
of forces. The path of the charged particle is :

(A) circular (B) ellipse

(C) straight line (D) helical

4. LVsi-vi VªkalQkWeZj esa dkSu-lh ek=k c<+kbZ tkrh gS \ 1

(A) fo|qr /kkjk (B) oksYVst

(C) 'kfDr (D) vko`fÙk

Which quantity is increased in a step-up transformer ?

(A) current (B) voltage

(C) power (D) frequency

2229/(Set : A) P. T. O.

(6) 2229/(Set : A)
5. dkap esa] çdk'k dk osx U;wure gksrk gS % 1

(A) yky (B) cSaxuh
(C) ihyk (D) gjk

In glass, the velocity of the light is minimum for :

(A) red (B) violet

(C) yellow (D) green

6. ;ax ds Mcy fLyV ç;ksx esa fÝat dh pkSM+kbZ β ikbZ tkrh gSA ;fn laiw.kZ midj.k dks viorZukad n ds æo
esa Mqcks;k tk,] rks ubZ fÝat pkSM+kbZ gksxh % 1

(A) β (B) nβ

(C) β/n (D) n2β

In Young's double slit experiment the fringe width is found to be β. If the entire
apparatus is immersed in liquid of refractive index n, the new fringe width will
be :

(A) β (B) nβ

(C) β/n (D) n2β

7. ;fn os leku osx ls xfr dj jgs gSa] rks fuEufyf[kr esa ls fdldh Mh-czkWXyh rjaxnS?;Z lcls yach gS \ 1

(A) çksVkWu (B) U;wVªkWu

(C) α-d.k (D) β-d.k

2229/(Set : A)

(7) 2229/(Set : A)
Which of the following has the longest de-Broglie wavelength, if they are moving
with same velocity ?

(A) proton

(B) neutron

(C) α-particle

(D) β-particle

8. fuEufyf[kr esa ls fdl d.k dk æO;eku bysDVªkWu ds cjkcj gS \ 1

(A) U;wVªkWu

(B) çksVkWu

(C) ikWft+VªkWu

(D) U;wfVªuks

Which of the following particle has mass equal to that of electron ?

(A) neutron

(B) proton

(C) positron

(D) neutrino

2229/(Set : A) P. T. O.

(8) 2229/(Set : A)
9. bafM;e dks tesZfu;e ds lkFk feykdj fdl çdkj dk v/kZpkyd cuk;k tkrk gS \ 1

(A) n-çdkj

(B) p-çdkj

(C) (A) vkSj (B) nksuksa

(D) buesa ls dksbZ ugha

Which type of semi-conductor is made by mixing Indium with Germanium ?

(A) n-type

(B) p-type

(C) both (A) and (B)

(D) none of these

fuEufyf[kr ç'uksa ds mÙkj ,d 'kCn/okD; esa nhft, %
Answer the following questions in one word/sentence :

10. OghVLVksu fczt dh larqfyr fLFkfr D;k gS \ 1

What is balanced condition of Wheatstone bridge ?

2229/(Set : A)

(9) 2229/(Set : A)
11. pqacdh; ¶yDl ?kuRo dh SI bdkbZ fy[ksaA 1

Write SI unit of magnetic flux density.

12. ije 'kwU; ij 'kq) v/kZpkyd dh çfrjks/kdrk D;k gS \ 1

What is the resistivity of pure semi-conductor at absolute zero ?

LFkkuksksa dh iwfrZ djsa %
fjDr LFkku
Fill in the blanks :

13. bysDVªkWu oksYV (eV) ----------- dh bdkbZ gSA 1

Electron volt (eV) is the unit of …………… . _

14. ------------- dks NksM+dj lHkh ijek.kqvksa ds ukfHkd esa U;wVªkWu gksrs gSaA 1

All atoms except …………… contain neutron in their nuclei.

15. ,d gzkl ijr ------------- ls cuh gkssrh gSA 1
A depletion layer consists of …………… .

fuEufyf[kr ç'uksa ¼16, 17 vkSj 18½ esa nks dFku fn, x, gSa % ftuesa ,d dks vfHkdFku (A) rFkk nwljs dks
dkj.k (R) }kjk vafdr fd;k x;k gSA bu dFkuksa dks /;kuiwoZd if<+, vkSj uhps fn, x, fodYiksa (A), (B), (C)
vkSj (D) esa ls mÙkj ds :i esa lgh fodYi pqfu, %
Two statements are given in the following questions (16, 17 and 18) : one labelled as
Assertion (A) and other labelled as Reason (R). Read the statements carefully and
choose the correct option as the answer from the options (A), (B), (C) and (D) given
below :

2229/(Set : A) P. T. O.

( 10 ) 2229/(Set : A)
16. vfHkdFku (A) : çdk'k fo|qr çHkko] çdk'k dh d.k çÑfr dks çnf'kZr djrk gSA 1

dkj.k (R) : QksVksbysfDVªd djaV] nsgyh vko`fÙk ls vf/kd vko`fÙk;ksa ds fy, ?kVuk fofdj.k dh rhozrk ds
lekuqikrh gksrk gSA

fodYi %

(A) vfHkdFku (A) rFkk dkj.k (R) nksuksa lR; gSa rFkk dkj.k (R), vfHkdFku (A) dk lgh Li"Vhdj.k gSA

(B) vfHkdFku (A) rFkk dkj.k (R) nksuksa lR; gS]a ysfdu dkj.k (R), vfHkdFku (A) dk lgh Li"Vhdj.k
ugha gSA

(C) vfHkdFku (A) lR; gS] ysfdu dkj.k (R) vlR; gSA

(D) vfHkdFku (A) rFkk dkj.k (R) nksuksa vlR; gSaA

Assertion (A) : Photoelectric effect demonstrate the particle nature of the light.

Reason (R) : Photoelectric current is proportional to intensity of incident
radiation for frequencies more than the threshold frequency.

Option :

(A) Both Assertion (A) and Reason (R) are true and the Reason (R) is the correct
explanation of Assertion (A).

(B) Both Assertion (A) and Reason (R) are true, but the Reason (R) is the
incorrect explanation of Assertion (A).

(C) Assertion (A) is true, but Reason (R) is false.

(D) Assertion (A) and Reason (R) both are false.

2229/(Set : A)

( 11 ) 2229/(Set : A)
17. vfHkdFku (A) : ykbeu Js.kh fo|qr pqEcdh; LisDVªe ds ijkcSaxuh {ks= esa fLFkr gSA 1

dkj.k (R) : ykbeu dk vFkZ ijkcSaxuh gS blfy, Js.kh ijkcSaxuh {ks= esa gSA

fodYi %

(A) vfHkdFku (A) rFkk dkj.k (R) nksuksa lR; gSa rFkk dkj.k (R), vfHkdFku (A) dk lgh Li"Vhdj.k gSA

(B) vfHkdFku (A) rFkk dkj.k (R) nksuksa lR; gS]a ysfdu dkj.k (R), vfHkdFku (A) dk lgh Li"Vhdj.k
ugha gSA

(C) vfHkdFku (A) lR; gS] ysfdu dkj.k (R) vlR; gSA

(D) vfHkdFku (A) rFkk dkj.k (R) nksuksa vlR; gSaA

Assertion (A) : Lyman series lies in the ultraviolet region of electromagnetic
spectrum.
Reason (R) : Lyman means ultra violet hence series is in ultraviolet region.

Option :

(A) Both Assertion (A) and Reason (R) are true and the Reason (R) is the correct
explanation of Assertion (A).

(B) Both Assertion (A) and Reason (R) are true, but the Reason (R) is the
incorrect explanation of Assertion (A).

(C) Assertion (A) is true, but Reason (R) is false.

(D) Assertion (A) and Reason (R) both are false.

2229/(Set : A) P. T. O.

( 12 ) 2229/(Set : A)
18. vfHkdFku (A) : lHkh v/kZpkyd midj.kksa esa gzkl ijr dh eksVkbZ fuf'pr gksrh gSA 1

dkj.k (R) : gzkl ijr esa eqDr okgd miyC/k gksrs gSaA

fodYi %

(A) vfHkdFku (A) rFkk dkj.k (R) nksuksa lR; gSa rFkk dkj.k (R), vfHkdFku (A) dk lgh Li"Vhdj.k gSA

(B) vfHkdFku (A) rFkk dkj.k (R) nksuksa lR; gS]a ysfdu dkj.k (R), vfHkdFku (A) dk lgh Li"Vhdj.k
ugha gSA

(C) vfHkdFku (A) lR; gS] ysfdu dkj.k (R) vlR; gSA

(D) vfHkdFku (A) rFkk dkj.k (R) nksuksa vlR; gSaA

Assertion (A) : The thickness of the depletion layer is fixed in all semi-
conductor devices.

Reason (R) : Free carriers are available in depletion layer.

Option :

(A) Both Assertion (A) and Reason (R) are true and the Reason (R) is the correct
explanation of Assertion (A).

(B) Both Assertion (A) and Reason (R) are true, but the Reason (R) is the
incorrect explanation of Assertion (A).

(C) Assertion (A) is true, but Reason (R) is false.

(D) Assertion (A) and Reason (R) both are false.

2229/(Set : A)

( 13 ) 2229/(Set : A)
[k.M – c
SECTION – B
[ vfry?kq
vfry?kq mÙkjh; iz'u ]
[ Very Short Answer Type Questions ]

19. 10 V fo|qr okgd cy okyh cSVjh ftldk vkarfjd çfrjks/k 3 Ω gS] fdlh çfrjks/kd ls la;ksftr gSA ;fn
ifjiFk esa /kkjk dk eku .5 A gks] rks % 2

(i) çfrjks/kd dk çfrjks/k D;k gS \
(ii) tc ifjiFk can gS] rks lsy dh VfeZuy oksYVrk D;k gksxh \
A battery of emf 10 V and internal resistance 3 Ω is connected to a resistor. If
the current in the circuit is .5 A :

(i) What is the resistance of the resistor ?

(ii) What is the terminal voltage, when the circuit is closed ?

20. ,ehVj D;k gS \ vki xSYosuksehVj dks vko';d lhek ds ,ehVj esa dSls cny ldrs gSa \ 2

What is Ammeter ? How you can convert the galvanometer into the ammeter of
required range ?

vFkok
OR

oksYVehsVj D;k gS \ vki xSYosuksehVj dks vko';d lhek ds oksYVehVj esa dSls cny ldrs gSa \
What is Voltmeter ? How you can convert the galvanometer into the voltmeter of
required range ?

2229/(Set : A) P. T. O.

( 14 ) 2229/(Set : A)
21. ysat ds fu;e ÅtkZ laj{k.k ds fu;e dk ikyu djrk gS] o.kZu djsaA 2

Explain, how Lenz's Law show the conservation of energy in the phenomena of
Electromagnetic Induction.

vFkok

OR

QSjkMs ds fo|qr pqEcdh; çsj.k ds fu;e fy[ksaA
State Faraday's Law of Electromagnetic Induction.

vFkok
OR

;ksX;rk vk/kkfjr ç'u %
Competancy Based Question :

,dleku B {ks= ds ek/;e ls] ,d NksVk vk;rkdkj ywi fujarj osx ds lkFk tk jgk gS %
(a) le; ds laca/k esa ¶yDl ds ifjorZu dks fn[kk;saA
(b) le; ds laca/k esa çsfjr fo|qr okgd cy dks fn[kk;saA
× × × × × × × × ×
v× × × × × × × × ×
v v
× × × × × × × × ×
× × × × × × × × ×

2229/(Set : A)

( 15 ) 2229/(Set : A)
Through a uniform B field, a small rectangular loop is moving as shown :
(a) Plot variation of flux through the loop with respect to time.
(b) Induced e.m.f. with respect to time.
× × × × × × × × ×
v× × × × × × × × ×
v v
× × × × × × × × ×
× × × × × × × × ×

22. eku yhft, fd vory niZ.k ds ijkorZd i`"B dk fupyk vk/kk Hkkx vikjn'khZ inkFkZ ls <dk gqvk gSA
niZ.k ds lkeus j[kh oLrq ds çfrfcac ij bldk D;k çHkko iM+sxk \ fp= dh lgk;rk ls le>kb,A 2

Suppose that the lower half of the concave mirror reflecting surface is covered

with an opaque material. What effect will this have on the image of object placed

in front of mirror ? Explain with the help of diagram.

23. lqlaxr lzksr D;k gSa \ nks lzksrksa dh lqlaxrrk ds fy, 'krZ fyf[k,A 2

What are coherent sources ? Write condition for coherence of two sources.

vFkok
OR

;ax ds f}f>jh ç;ksx es]a λ rjaxnS?;Z dk ,do.kZhZ; çdk'k mi;ksx djus ij] ijns ds ,d fcanq ij tgk¡ iFkkarj
λ
λ gS] çdk'k dh rhozrk K bdkbZ gS] ml fcanq ij çdk'k dh rhozrk fdruh gksxh] tgk¡ iFkkarj gS \
3
In YDSE using monochromatic light of wavelength λ, the intensity of light at a
point on the screen, where path difference is λ, is K units. What is intensity of
λ
light at a point, where path difference is ?
3

2229/(Set : A) P. T. O.

( 16 ) 2229/(Set : A)
24. lksfM;e dh o.kZØeh; mRltZu js[kk ls çdk'k dh rjaxnS?;Z 589 nm gS vkSj ;g ,d bysDVªkWu ij
vkifrr gksrh gSA bysDVªkWu dh xfrt ÅtkZ Kkr dhft,A 2
The wavelength of light from spectral emission line of sodium is 589 nm and it is
incident on an electron. Find the kinetic energy of electron.

25. fn;k x;k gS fd yksgs ds ukfHkd dk æO;eku 55.85 a.m.u. gS vkSj A = 56 gS] rks ijek.kq ?kuRo Kkr
dhft,A (fn;k gS % 1 a. m. u. = 1.67 × 10 − 27 kg, Ro = 1.2 × 10 −15 m.) 2
Given the mass of iron nucleus is 55.85 a.m.u. and A = 56, find the nuclear
density. (Given : 1 a. m. u. = 1.67 × 10 − 27 kg, Ro = 1.2 × 10 −15 m)

[k.M – l
SECTION – C

[ y?kq
y?kq mÙkj
mÙkjh;
Ùkjh; iz'u ]
[ Short Answer Type Questions ]

26. ,d vuar yacs lh/ks vkosf'kr rkj ds dkj.k fo|qr {ks= ds fy, O;atd çkIr djsaA 3

Obtain an expression for electric field due to an infinite long straight charged
wire.

27. fo|qr pqEcdh; LisDVªe ds ml Hkkx dh igpku dhft,] tks % 3

(i) jMkj ç.kkyh ds fy, mi;qDr gS

(ii) ijek.kq çfrfØ;k esa mRiUu gksrk gS

(iii) mPp xfr okys bysDVªkWu }kjk /kkrq y{; ij ceckjh djds mRiUu gksrk gS

2229/(Set : A)

( 17 ) 2229/(Set : A)
Identify the part of electromagnetic spectrum, which is :

(i) suitable for radar system

(ii) produced in nuclear reaction
(iii) produced by bombarding a metal target by high speed electron

vFkok
OR

ekbØksoso] xkek fdj.ksa] ijkcSaxuh fdj.kksa esa ls çR;sd dk ,d mi;ksx fyf[k,A
Write one use of each of microwave, gamma rays, ultraviolet rays.

28. ,d VSad dks 12.5 lseh dh Å¡pkbZ rd ikuh ls Hkjk tkrk gSA VSad ds ry ij iM+h gqbZ lqbZ dh Li"V
xgjkbZ ekbØksLdksi }kjk 9.4 lseh ekih xbZ gSA ikuh dk viorZukad D;k gS \ ;fn ikuh dks mlh Å¡pkbZ
rd 1.63 viorZukad ds æo ls çfrLFkkfir fd;k tk,] rks lqbZ ij iqu% /;ku dsafær djus ds fy,
ekbØksLdksi dks fdruh nwjh rd ys tkuk gksxk \ 3

A tank is filled with water to a height of 12.5 cm. The apparent depth of a needle
lying at the bottom of tank is measured by a microscope to be 9.4 cm. What is
the refractive index of water ? If water is replaced by liquid of refractive index
1.63 upto the same height, by what distance would the microscope have to be
moved to focus on the needle again ?

29. ijek.kq ce vkSj gkbMªkstu ce dh dk;Zç.kkyh ds vk/kkj ij çfØ;kvksa ds chp varj djsaA 3
Distinguish between processes on which working of atom bomb and hydrogen
bomb is based.

30. ,lh dks Mhlh esa ifjofrZr djus ds fy, mi;ksx fd, tkus okys iw.kZ rjax fn"Vdkjh midj.k ds fy,
lfdZV vkjs[k cuk,¡ vkSj buiqV vkmViqV oksYVst fn[kk,¡A 3
Draw the circuit diagram for the device used for converting AC to DC for full
wave rectifier and show the input output voltages.
2229/(Set : A) P. T. O.

( 18 ) 2229/(Set : A)
vFkok

OR

fdlh p-n laf/k Mk;ksM dk (a) vxzfnf'kd ck;l (b) i'pfnf'kd ck;l esa V-I vfHkyk{kf.kd rFkk çk;ksfxd
ifjiFk cuk;saA
Draw V-I characteristics of a p-n junction diode in (a) forward bias (b) reverse
bias. Draw experimental circuit also.

[k.M – n
SECTION – D

[ nh?kZ mÙkjh; iz'u ]

[ Long Answer Type Questions ]

31. nks lekukarj /kkjkokgh daMDVjksa ds chp çfr bdkbZ yackbZ ij cy ds fy, ,d O;atd çkIr djsaA 1 ,fEi;j
dks ifjHkkf"kr djsaA 5

Obtain an expression for force per unit length between two parallel current
carrying conductors. Define 1 ampere.

vFkok

OR

(a) ykWjsUV~t cy D;k gS \ O;k[;k djsaA

What is Lorentz force ? Explain.

2229/(Set : A)

( 19 ) 2229/(Set : A)
(b) py dqaMyh xSYosuksehVj esa jsfM;y pqacdh; {ks= dk D;k egÙo gS \ lfp= fn[kk;saA
What is the importance of radial magnetic field in moving coil
galvanometer ? Show diagrammatically.

(c) py dqaMyh xSYosuksehVj esa QkWLQksj dkaL; rkj dk mi;ksx D;ksa fd;k tkrk gS \
Why phosphor bronze wire is used in moving coil galvanometer ?

32. LCR Js.kh AC ifjiFk esa viO;f;r 'kfDr ds fy, O;atd O;qRiUu djsa rFkk ikWoj QSDVj le>k,¡A 5

Derive an expression for power dissipated in LCR series AC circuit and explain
power factor.

vFkok
OR

,0lh0 tfu= ds fl)kar] fuekZ.k vkSj dk;Z dh O;k[;k djsaA
Explain principle, construction and working of A. C. generator.

33. çdk'k viorZukad n1 ds ek/;e esa ;k=k dj jgk gS vkSj viorZukad n2 ds ek/;e esa bl çdkj ços'k
djrk gS fd n1 < n2 gSA ;fn çdk'k vory xksykdkj lrg ij vkifrr gksrk gS] rks n1, n2, u, v vkSj
R ds chp laca/k O;qRiUu djsaA 5

Light is travelling in a medium of refractive index n1 enters into medium of

refractive index n2 such that n1 < n2. Derive relation between n1, n2, u, v and R, if

light incident on concave spherical surface.

2229/(Set : A) P. T. O.

( 20 ) 2229/(Set : A)
vFkok
OR

foorZu D;k gS \ bls vkjs[k dh lgk;rk ls le>k,¡A
What is diffraction ? Explain it with the help of diagram.

vFkok
OR

;ksX;rk vk/kkfjr ç'u %
Competancy Based Question :

fp= esa dksbZ leksÙky ysal ¼viorZukad 1.50½ fdlh lery niZ.k ds Qyd ij fdlh æo dh ijr ds
laidZ esa n'kkZ;k x;k gS dksbZ NksVh lqbZ ftldh uksad eq[; v{k ij gSA v{k ds vuqfn'k Åij-uhps xfr
djkdj bl çdkj lek;ksftr dh tkrh gS fd lqbZ dh uksad dk mYVk çfrfcac lqbZ dh fLFkfr ij gh cusA

bl fLFkfr esa lqbZ dh ysal ls nwjh 45 cm gSA æo dks gVkdj ç;ksx dks nksgjk;k tkrk gSA u;h nwjh
30 cm ekih tkrh gSA æo dk viorZukad D;k gS \

Q P' Q'
P

2229/(Set : A)

( 21 ) 2229/(Set : A)
Fig. shows an equiconvex lens (of refractive index 1.50) in contact with a liquid
layer on top of a plane mirror. A small needle with its tip on the principal axis is
moved along the axis until its inverted image is found at the position of the
needle. The distance of the needle from the lens is measured to be 45 cm. The
liquid is removed and the experiment is repeated. The new distance is measured
to be 30 cm. What is refractive index of the liquid ?
Q'
Q P P'

[k.M – ;
SECTION – E

[ dsl LVMh vk/kkfjr ç'u ]

[ Case Study Based Questions ]

34. fuEufyf[kr vuqPNsn ¼iSjkxzkQ½ dks /;kuiwoZd if<+, vkSj mlds uhps fn;s x;s ç'uksa ds mÙkj nhft, %
varfj{k esa ,d fcanq ij ,d vkos'k ds dkj.k fo|qr {ks= dks ml cy ds :i esa ifjHkkf"kr fd;k tk ldrk
gS tks ,d bdkbZ /kukRed vkos'k ml fcanq ij j[ks tkus ij vuqHko djsxk] ;g ,d lfn'k jkf'k gS fo|qr
{ks= js[kk,¡ /kukRed vkos'kksa ls 'kq: gksrh gSa vkSj _.kkRed vkos'kksa ij lekIr gksrh gSaA ,dy vkos'k ds
ekeys esa os vuar ij 'kq: ;k lekIr gks ldrs gSa] fo|qr {ks= js[kk,¡ ,d pkyd ls ugha xqtjrh gSaA

2229/(Set : A) P. T. O.

( 22 ) 2229/(Set : A)
Read the following paragraph carefully and answer the questions that follow :

The electric field due to a charge at a point in space may be defined as force that
a unit positive charge would experience if placed at that point it is a vector
quantity electric field lines start from positive charges and end at negative
charges. In case of a single charge they may start or end at infinity electric field
line do not pass through a conductor.

(i) fo|qr {ks= dh rhozrk dh bdkbZ D;k gS \ 1

What is the unit of electric field intensity ?

(ii) ,dy _.kkRed vkos'k ds fy, fo|qr cy js[kk [khafp,A 1

Draw electric line of force for single negative charge.

(iii) pkyd ds vanj fLFkjoS|qr {ks= dk eku D;k gksrk gS vkSj dkj.k crk;ssa \ 2

What is the value of electrostatic field inside a conductor and give reason
also ?

vFkok
OR

pkj fcUnq vkos'k (Q) dks a lseh Hkqtk okys oxZ ds dksus ij j[kk x;k gSA oxZ ds dsaæ ij fo|qr {ks=
dk ifjek.k Kkr dhft, vkSj dkj.k crk;sa \
Four point charges (Q) are placed at the corner of the square of side a cm.
Find magnitude of electric field at the center of square and give reason
also ?

2229/(Set : A)

( 23 ) 2229/(Set : A)
35. fuEufyf[kr vuqPNsn ¼iSjkxzkQ½ dks /;kuiwoZd if<+, vkSj mlds uhps fn;s x;s ç'uksa ds mÙkj nhft, %
vkse ds fu;e dk ikyu dbZ inkFkZ djrs gSa] ysfdu dksbZ ;g ugha dg ldrk gS fd ;g çÑfr dk ewy
fu;e gSA ;g /kkjk ds çokg ds ckjs esa ,d ewy fu;e gS tks çfrjks/k dks vkuqikfrdrk ds fLFkjkad ds #i
esa ifjHkkf"kr djrk gSA vkse ds fu;e }kjk yackbZ vkSj {ks=Qy ij R dh fuHkZjrk ij ppkZ dh xbZ FkhA
,d pkyd ij yxk;k x;k foHko vkSj mlesa çokfgr /kkjk Hkh bl fu;e dh ppkZ fd, x, egÙoiw.kZ
fcanqvksa esa ls ,d FkkA

Read the following paragraph carefully and answer the questions that follow :

Ohm's law is obeyed by many substances, but one cannot say that it is the
fundamental law of nature. It is a basic law regarding flow of current which
define resistance as constant of proportionality. The dependence of R on length
and area was discussed by Ohms law. The potential applied across a conductor
and current through it was also one of important point discussed in this law.

(i) vkse ds fu;e dh lhek crk,¡A 1

Write limitations of Ohm's law.

(ii) vkse dk fu;e ewy fu;e D;ksa ugha gS \ 1

Why Ohm's law is not a fundamental law ?

(iii) GaAs esa oksYVrk ds lkis{k /kkjk esa ifjorZu fn[kkb,A 2

Draw variation of current versus voltage for GaAs.

2229/(Set : A) P. T. O.

( 24 ) 2229/(Set : A)
vFkok

OR

çfrjks/k dh bdkbZ vkSj foek fyf[k,A

Write the unit and dimension of resistance.

S

2229/(Set : A)