Rajasthan Board Class 12 Question Paper 2025 Physics

RAJASTHAN BOARD

QUESTION
PAPER
2025

ANNUAL EXAMINATION

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Zm_m§H$ Roll No.

Tear Here
Sl.No. :

No. of Questions – 18
No. of Printed Pages – 19
SS–40–Physics

Cƒ _mÜ`{_H$ narjm, 2025
SENIOR SECONDARY EXAMINATION, 2025
^m¡{VH$ {dkmZ

TEAR HERE TO OPEN THE QUESTION PAPER
PHYSICS
g_` : 3 KÊQ>o 15 {‘{ZQ>

àíZ nÌ H$mo ImobZo Ho$ {bE `hm± \$m‹S>|
nyUmªH$ : 56

narjm{W©`m| Ho$ {bE gm_mÝ` {ZX}e …
GENERAL INSTRUCTIONS TO THE EXAMINEES :

1) narjmWu gd©àW_ AnZo àíZ nÌ na Zm_m§H$ A{Zdm`©V… {bI|&
Candidate must write first his / her Roll No. on the question paper
compulsorily.

2) g^r àíZ H$aZo A{Zdm`© h¢&
All the questions are compulsory.

3) g^r àíZm| H$m CÎma Xr JB© CÎma-nwpñVH$m _| hr {bI|&
`hm± go H$m{Q>E

Write the answer to all questions in the given answer-book only.

SS–40–Physics 7032 [ Turn Over

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4) {OZ àíZmo§ _| AmÝV[aH$ IÊS> h¡§, CZ g^r Ho$ CÎma EH$ gmW hr {bI|&

For questions having more than one part, the answers to those parts are to be
written together in continuity.

5) àíZ nÌ Ho$ {hÝXr d A§J«oOr ê$nmÝVa _o| {H$gr àH$ma H$s Ìw{Q> / AÝVa / {damoYm^mg hmoZo na {hÝXr ^mfm
Ho$ àíZ H$mo hr ghr _mZ|&

If there is any error/difference/contradiction in Hindi & English versions of
the question paper, the question of Hindi version should be treated valid.

6) àíZ H$m CÎma {bIZo go nyd© àíZ H$m H«$‘m§H$ Adí¶ {bI|&

Write down the serial number of the question before attempting it.

7) àíZ H«$‘m§H$ 14, 15, 16, 17 d 18 ‘| AmÝV[aH$ {dH$ën h¢&

There are internal choices in Question Nos. 14, 15, 16, 17 & 18.

SS– 40–Physics 7032

3
IÊS> - A
SECTION - A

1) ~hþ{dH$ënr àíZ (i go xviii) : {ZåZ{b{IV àíZm| Ho$ CÎma H$m ghr {dH$ën M¶Z H$a CÎma nwpñVH$m ‘| {b{IE&
Choose the correct answer from multiple choice question (i to xviii) and write in
given answer book.
i) d¡ÚwV âb³g H$m SI ‘mÌH$ h¡ [½]

A) N C m2 ~) N C–1 m–2

g) N C–1 m2 X) N2 C–1 m2
The SI unit of electric flux is
A) N C m2 B) N C–1 m–2
C) N C–1 m2 D) N2 C–1 m2
ii) r Xÿar na aIo Xmo {~ÝXþ Amdoem| Ho$ ‘ܶ H$m¶©aV ~b H$m ‘mZ F h¡& ¶{X CZHo$ ‘ܶ H$s Xÿar 2r H$a Xr
OmE Vmo ~b H$m ‘mZ hmoJm [½]

F
A) F ~)
2

F F
g) X)
4 8

The force between two point charges placed at distance r apart, is F. If the
distance increased to 2r between the charges then force will be

F
A) F B)
2

F F
C) D)
4 8

SS– 40–Physics 7032 [ Turn Over

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iii) g§Ym[aÌ ‘| g§{MV D$Om© ê$n ‘| ahVr h¡ - [½]
A) J{VO D$Om© Ho$ ~) pñW{VO D$Om© Ho$
g) D$î‘m D$Om© Ho$ X) Mwå~H$s¶ D$Om© Ho$
The energy stored in a capacitor is in the form of -
A) Kinetic energy B) Potential energy
C) Heat energy D) Magnetic energy
iv) g§b¾ n[anW ‘| A‘rQ>a H$m nmR²>¶m§H$ h¡ - [½]

5 5

10
5
5
A

+ –
2V
1 2
A) A ~) A
5 5

3 4
g) A X) A
5 5
The ammeter reading in the adjoing circuit is

5 5

10
5
5
A

+ –
2V
1 2
A) A B) A
5 5

3 4
C) A D) A
5 5

SS– 40–Physics 7032

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v) EH$ {dÚwV Amdoe q, doJ v go g‘én Mwå~H$s¶ joÌ B ‘| Mwå~H$s¶ ~b aoImAm| Ho$ g‘mÝVa J{V H$a
ahm h¡& Amdoe na H$m¶©aV Mwå~H$s¶ ~b h¡ - [½]

A) eyݶ ~) qvB

qB qv
g) X)
v B

An electric charge q is moving in a uniform magnetic field B parallel to the
lines of force with velocity v. The magnetic force acting on the charge is

A) Zero B) qvB

qB qv
C) D)
v B

vi) m Mwå~H$s¶ AmKyU© dmbo Mwå~H$s¶ {ÛY«wd H$mo  H$moU go Mwå~H$s¶ joÌ B ‘| aIZo na CËnÞ pñW{VO
D$Om© h¡- [½]

A) – mB cos  ~) – mB sin 

g) mB tan  X) eyݶ

When a magnet of magnetic moment m is placed with angle  in a magnetic
field B then the produced potential energy is

A) – mB cos  B) – mB sin 

C) mB tan  D) Zero

SS– 40–Physics 7032 [ Turn Over

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vii) EH$ à˶mdVu Ymam O{ZÌ n[ad{V©V H$aVm h¡ - [½]
A) ¶m§{ÌH$ D$Om© H$mo amgm¶{ZH$ D$Om© ‘| ~) amgm¶{ZH$ D$Om© H$mo ¶m§{ÌH$ D$Om© ‘|
g) {dÚwV D$Om© H$mo ¶m§{ÌH$ D$Om© ‘| X) ¶m§{ÌH$ D$Om© H$mo {dÚwV D$Om© ‘|
An ac generator converts
A) Mechanical energy into chemical energy
B) Chemical energy into mechanical energy
C) Electric energy into mechanical energy
D) Mechanical energy into electric energy
viii) {XE JE n[anW ‘| à˶mdVu dmoëQ>Vm H$m ‘mZ h¡ - [½]

VR=8V VL =4V V C =10V

R L C

~
A) 2 V ~) 4V
g) 8V X) 10 V
The value of alternating voltage in the following circuit is -

VR=8V VL =4V V C =10V

R L C

~
A) 2V B) 4V
C) 8V D) 10 V

SS– 40–Physics 7032

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ix) b|O H$m {Z¶‘, ^m¡{VH$ am{e Ho$ g§ajU na AmYm[aV h¡ - [½]

A) g§dJo ~) H$moUr¶ g§doJ
g) D$Om© X) Amdoe
Lenz’s law is based on conservation of physical quantity -

A) momentum B) angular momentum

C) energy D) charge

x) ³bmB©ñQ´>m°Z ¶m ‘o¾oQ´>m°Z Ûmam CËnmXZ {H$¶m OmVm h¡ - [½]

A) gyú‘ V§aJmo H$m ~) ao{S>¶mo V§aJmo H$m

g) nam~¢JZr {H$aUmo§ H$m X) x-{H$aUmo§ H$m

Klystrons or Magnetrons are used to produce -

A) microwaves B) radiowaves

C) ultraviolet rays D) x-rays

xi) f1 VWm f2 ’$moH$g Xÿar dmbo Xmo nVbo boÝgmo H$mo EH$ Xÿgao Ho$ g§nH©$ ‘| aIZo na g§¶moOZ H$s à^mdr
’$moH$g Xÿar hmoJr [½]

A) f = f1 + f2 ~) f = f1 – f2

f1  f 2 f1 f 2
g) f  X) f 
f1 f 2 f1  f 2

Two thin lenses of focal length f1 and f2 are placed in contact with each other
the effective focal length of the combination will be

A) f = f1 + f2 B) f = f1 – f2

f1  f 2 f1 f 2
C) f  D) f 
f1 f 2 f1  f 2

SS– 40–Physics 7032 [ Turn Over

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xii) àH$me Va§Jmo H$s AZwàñW àH¥${V hmoZo H$s nw{ð> hmoVr h¡ - [½]

A) namdV©Z Ûmam ~) AndV©Z Ûmam

g) Y«wdU Ûmam X) ì¶{VH$aU Ûmam

The confirmation of transverse nature of light waves is by

A) reflection B) refraction

C) polarisation D) interference

xiii) EH$ ’$moQ>moZ H$s D$Om© 18 eV VWm YmVw H$m H$m¶©’$bZ 8 eV h¡& BgHo$ {ZamoYr {d^d H$m ‘mZ h¡ -[½]

A) eyݶ ~) 8V

g) 10 V X) 26 V

The energy of a photon is 18 eV and the work function of the material is 8 eV.
The value of stopping potential is

A) zero B) 8V

C) 10 V D) 26 V

xiv) hmBS´>moOZ na‘mUw H$s {ZåZV‘ AdñWm H$s D$Om© –13.6 eV h¡& Bg AdñWm go Bbo³Q´>m°Z H$mo ‘wº$ H$amZo
Ho$ {bE Amdí¶H$ ݶyZV‘ D$Om© hmoJr - [½]

A) eyݶ ~) +13.6 eV

g) –13.6 eV X) –27.2 eV

The energy of ground state of hydrogen atom is –13.6 eV. The minimum
energy required to free the electron from this state is

A) zero B) +13.6 eV

C) –13.6 eV D) –27.2 eV

SS– 40–Physics 7032

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xv) ~moa Ho$ A{^J¥hrV Ho$ AZwgma {ZåZm§{H$V ^m¡{VH$ am{e ¹$mpÊQ>V h¡ - [½]

A) H$moUr¶ g§doJ ~) H$moUr¶ doJ

g) pñW{VO D$Om© X) g§dJo

According to Bohr’s hypothesis the following physical quantity is quantised -

A) angular momentum B) angular velocity

C) potential energy D) momentum

xvi) Zm{^H$ H$s ~§YZ D$Om© ~am~a hmoVr h¡ - [½]

A) àmoQ>moZ Ho$ Ð춑mZ Ho$ ~) ݶyQ´>m°Z Ho$ Ð춑mZ Ho$

g) Zm{^H$ Ho$ Ð춑mZ Ho$ X) Zm{^H$ H$s Ð춑mZ j{V Ho$

The binding energy of a nucleus is equivalent to -

A) mass of proton B) mass of neutron

C) mass of nucleus D) mass defect of nucleus

xvii) n - àH$ma Ho$ AY©MmbH$ ‘| ~hþg§»¶H$ Ymam dmhH$ h¡ - [½]

A) Bbo³Q´>mZ ~) hmob

g) Bbo³Q´>moZ Ed§ hmob XmoZmo§ X) Am¶Z

The majority charge carriers in n-type semiconductors are -

A) electrons B) holes

C) both electrons and holes D) ions

SS– 40–Physics 7032 [ Turn Over

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xviii) na‘ eyݶ Vmn na ZoO AY©MmbH$mo H$s MmbH$Vm hmoVr h¡ - [½]

A) eyݶ ~) AZÝV

g) 1 åhmo/‘r X) 100 åhmo/‘r

The conductivity of intrinsic semiconductors at absolute zero temperature is -

A) zero B) infinite

C) 1 mho/m D) 100 mho/m

2) [a³V ñWmZm| H$s ny{V© H$s{OE : (i go x)

Fill in the blanks : (i to x)

i) {dÚwV {ÛY«wd Ho$ H$maU CgHo$ Aj na joÌ H$s Vrd«Vm Xÿar Ho$ .............. Ho$ ì¶wËH«$‘mZwnmVr hmoVm h¡&
[½]

The electric field intensity at axis due to a electric dipole is inversely proportional
to the ________ of distance.

ii) à{V EH$m§H$ {dÚwV joÌ Ho$ Andmh doJ H$m n[a‘mU ............... Ho$ ~am~a hmoVm h¡& [½]

Magnitude of the drift velocity per unit electric field is equal to ________.

iii) EH$ JoëdoZmo‘rQ>a H$mo E‘rQ>a ‘| énmÝV[aV H$aZo Ho$ {bE BgHo$ nmíd©H«$‘ ‘| ............... Omo‹S>Vo h¢&
[½]

To convert a galvanometer into an ammeter ________ is connected in parallel
to the it.

SS– 40–Physics 7032

11
iv) AZwMwå~H$s¶ nXmW© Ho$ {bE Mwå~H$s¶ àd¥{Îm  H$m ‘mZ ................ hmoVm h¡& [½]

Magnetic susceptibility  of a paramagnetic substance is ________.

v) ào[aV {d.dm.~. H$m n[a‘mU n[anW Ho$ .............. ‘| g‘¶ Ho$ gmW hmoZo dmbr n[adV©Z H$s Xa Ho$
~am~a hmoVm h¡& [½]

The magnitude of the induced e.m.f. is equal to the time rate of change of
________ through the circuit.

vi) ewÕ àoaH$Ëd ¶wº$ à˶mdVu n[anW ‘| à˶mdVu Ymam, à˶mdVu dmoëQ>Vm go ............... H$bmH$moU go
nrN>o hmoVr h¡& [½]

In a purely inductive a.c. circuit the alternating current lags behind the alternating
voltage by _________ phase angle.

vii) O~ gmo{S>¶‘ boån H$m àH$me nmoboam°BS> erQ> go nm[aV hmoVm h¡ Vmo BgH$s Vrd«Vm .............. hmo OmVr h¡&
[½]

When light from a sodium lamp passes through a polaroid sheet then its intensity
becomes ________.

viii) brZmS>© Ho$ àojU ‘| Xmo Bbo³Q´>moS>mo dmbr {Zdm©{VV H$m±M H$s Zbr ‘| CËgO©H$ n{Å>H$m na .............
{d{H$aUm| H$mo Amn{VV H$aZo na n[anW ‘| Ymam H$m àdmh hmoVm h¡& [½]

From observation of Lenard, when _______ radiation were allowed to fall
on the emitter plate of an evacuated glass tube enclosing two electrodes,
current flows in the circuit.

SS– 40–Physics 7032 [ Turn Over

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ix) ݶy Q´>m°Z H$s ImoO H$m lo¶ ............. H$mo {X¶m OmVm h¡& [½]

________ is credited with the discovery of the neutron.

x) AY© MmbH$mo H$s à{VamoYH$Vm ............... m go ............... m Ho$ ~rM H$s hmoVr h¡& [½]

The resistivity of semiconductors is between ________m to ________m.

3) {ZåZm§{H$V àíZm| Ho$ CÎma EH$ go Xmo n§{º$ ‘| Xr{OE& (i go x)

Give the answer of the following questions in one to two lines. (i to x)

i) d¡ÚwV {ÛY«wd AmKyU© H$mo n[a^m{fV H$s{OE& [1]

Define the electric dipole moment.

ii) {XE JE n[anW ‘| A VWm B {~ÝXþAm| Ho$ ‘ܶ Vwë¶ Ym[aVm kmV H$s{OE& [1]
1PF

6PF
A B
2PF

Determine the equivalent capacitance between the points A and B in the
adjoining figure.

1PF

6PF
A B
2PF

SS– 40–Physics 7032

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iii) {XE JE {MÌ ‘| JbV Mwå~H$s¶ joÌ aoIm±E Xem©¶r J¶r h¡& nhMm{ZE± H$s Bg‘| ³¶m JbVr h¡? [1]

‘w³V AmH$me
In this given diagram the magnetic field lines are shown wrongly. Point out
what is wrong with this?

free space
 
iv) EH$ g‘mZ Mwå~H$s¶ joÌ B ‘| XmobZ hoVw aIr Mwå~H$s¶ AmKyU© m dmbr Mw§~H$s¶ gwB© na CËnÞ ~b
AmKyU© H$m gyÌ {b{IE& [1]

Write the formula of torque on the magnetic needle of magnetic moment m

when it is allowing to oscillate in the uniform magnetic field B .

v) {MÌ ‘| {XImE AZwgma EH$ Mwå~H$ Hw$ÊS>br H$s Amoa bm¶m Om ahm h¡ n[anW ‘| CËnÞ Ymam {H$g {Xem
‘| hmoJr? [1]
C

S N

A G B

SS– 40–Physics 7032 [ Turn Over

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A magnet is brought towards a coil as shown in the adjoining figure. In which
direction the induced current will be?
C

S N

A G B

vi) EH$b {Par Ûmam {ddV©Z Ho$ {bE {’«$ÝOm| H$m Vrd«Vm {dVaU H$m {MÌ ~ZmB©¶o& [1]

Draw the diagram of intensity distribution of Fringes due to diffraction at
single slit.

vii) na‘mUw Ho$ ~moa ‘moS>b H$s H$moB© EH$ gr‘m {b{IE& [1]

Write any one limitation of Bohr’s atomic model.

viii) Zm{^H$s¶ g§b¶Z go AmnH$m ³¶m Ame¶ h¡? [1]

What do you understand by nuclear fusion?

ix) EH$ p-n g§{Y S>m¶mo‹S> Ho$ AJ«{X{eH$ ~m¶g ‘| V-I A{^bmj{UH$ dH«$mo Ho$ Aܶ¶Z Ho$ àm¶mo{JH$
n[anW H$m Zm§‘m{H$V {MÌ ~ZmB©¶o& [1]

Draw a labelled experimental circuit arrangement for studying the V-I
characteristic curves of a p-n junction diode in forward bias.

x) AndV©Z Ho$ {bE ñZob H$m {Z¶‘ {b{IE& [1]

Write Snell’s law of refraction.

SS– 40–Physics 7032

15

IÊS - ~
SECTION - B

4) EH$ AZÝV ao{IH$ Amdoe 4 cm Xÿar na 4.5×104 NC–1 {dÚwV joÌ CËnÞ H$aVm h¡& BgHo$ a¡{IH$ Amdoe
KZËd H$s JUZm H$s{OE& [1½]

An infinite line charge produces a field of 4.5×104 NC–1 at a distance 4 cm. Calculate
the linear charge density of it.

5) EH$ dñVw 20 cm dH«$Vm {ÌÁ¶m Ho$ AdVb Xn©U go 15 cm H$s Xÿar na aIr h¡& à{V{~å~ H$s pñW{V Ed§
àH¥${V kmV H$s{OE& [1½]

An object is placed at 15 cm in front of a concave mirror of radius 20 cm. Determine
the position and nature of the image.

6) {~ÝXþ Amdoe + Q go r Xÿar na CËnÞ {dÚwV {d^d H$s JUZm H$s{OE& [1½]

Calculate the electric potential at distance r produced by a point charge +Q.

7) r1 VWm r2 {ÌÁ¶m H$s Xmo g§Ho$ÝÐr d¥ÎmmH$ma Hw$ÊS>{b¶m± g‘mjr aIr h¡ VWm XmoZmo§ Ho$ Ho$ÝÐ g§nmVr h¡&
(Ohm± r1 << r2 )& Bg ì¶dñWm Ho$ {bE Aݶmoݶ àoaH$Ëd kmV H$s{OE& [1½]

Two concentric circular coils of radii r1 and r2 are placed co-axially with centres
coinciding. (where r1 << r2). Obtain the mutual inductance of this arrangement.

8) {dÚwV Mwå~H$s¶ V§aJmo Ho$ H$moB© Xmo A{^bjU {b{IE& [1½]

Write any two characteristics of electromagnetic waves.

SS– 40–Physics 7032 [ Turn Over

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9) 5000 Å Va§JX¡Ü¶© H$m àH$me dm¶w go Ob H$s gVh na Amn{VV hmoVm h¡& And{V©V àH$me H$s Mmb VWm
4
Amd¥{Îm kmV H$s{OE& nmZr H$m AndV©Zm§H$ h¡& [1½]
3

The light waves of 5000 Å wavelength is incident from air on a water surface. What
4
are the frequency and speed of refracted light. Refractive index of water is .
3

10) hmBJoÝg {gÕmÝV H$m Cn¶moJ H$aVo hþE àH$me Ho$ AndV©Z {Z¶‘m| H$mo g‘PmB©¶o& [1½]

Explain the laws of refraction of light using Huygen’s principle.

11) na‘mUw Ho$ aXa’$moS>© Zm{^H$s¶ ‘m°S>b Ho$ {bE hmBS´>moOZ na‘mUw ‘| J{Verb pñWa H$jm H$s {ÌÁ¶m Ed§ BgHo$
Bbo³Q´>m°Z H$s Hw$b D$Om© H$s JUZm H$s{OE& [1½]

Calculate the radius of dynamically stable orbit in hydrogen atom and total energy
of their electron in the orbit by Rutherford nuclear model of the atom.

12) Zm{^H$s¶ ~b go AmnH$m ³¶m Ame¶ h¡? à{V ݶwp³b¶m°Z ~§YZ D$Om© H$m Ð춑mZ g§»¶m Ho$ ’$bZ Ho$ ê$n ‘|
J«m’$ ItMH$a g‘PmB©¶o& [1½]

What do you understand by nuclear force? Draw the graph of binding energy per
nucleon as a function of mass numbers and explain.

13) D$Om© ~¡ÊS> Ho$ AmYma na {dÚwVamoYr Ed§ AY©MmbH$ nXmWm} H$mo g‘PmB¶o& [1½]

Explain the insulators and semiconductor substances on the basis of energy bands.

SS– 40–Physics 7032

17
IÊS> - g
SECTION - C

14) ìhrQ>-ñQ>moZ goVw H$m n[anW {MÌ ~ZmH$a JoëdoZmo‘rQ>a Ho$ eyݶ {djon Ho$ {bE {H$aImo’$ Ho$ {Z¶‘ go g§VwbZ
à{V~ÝY àmßV H$s{OE& [1+2=3]
Draw circuit diagram of a wheatstone bridge and obtain the balance condition for
the galvanometer to give zero or null deflection using Kirchoff’s Rule.
AWdm/OR
gob Ho$ AmÝV[aH$ à{VamoY go AmnH$m ³¶m Ame¶ h¡? 1 VWm 2 {d.dm.~. dmbo Xmo gob {OZH$m AmÝV[aH$
à{VamoY H«$‘e… r1 VWm r2 h¡, H$mo nañna loUr H«$‘ ‘| Omo‹S>m J¶m h¡& g§¶moOZ H$m Hw$b {d.dm.~ VWm Hw$b
AmÝV[aH$ à{VamoY kmV H$s{OE& Amdí¶H$ {MÌ ~ZmB©¶o& [1+2=3]
What do you understand by internal resistance of cell? Two cells of e.m.f. 1 and
2 whose internal resistance are r1 and r2 respectively, connected in series. Determine
the total e.m.f. and total internal resistance of the combination. Draw necessary
diagram.

15) Epån¶a H$m n[anWr¶ {Z¶‘ {b{IE& EH$ AZÝV bå~mB© Ho$ grYo Ymamdmhr MmbH$ Vma go r Xÿar na Mwå~H$s¶
joÌ H$s JUZm H$s{OE& [1+2=3]

Write Ampere’s circuital law. Determine the magnetic field at distance r from a
current carrying infinite straight wire.

AWdm/OR

~m¶mo-gmdQ>© {Z¶‘ {b{IE& EH$ {dÚwV Ymamdmhr nme Ho$ Aj na pñWV {~ÝXþ na Mwå~H$s¶ joÌ kmV H$s{OE&
[1+2=3]

Write Biot-Savart law. Determine the magnetic field at a point situated at the axis of
a circular current loop.

SS– 40–Physics 7032 [ Turn Over

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16) àH$me {dÚwV à^md ³¶m h¡? BgHo$ Aܶ¶Z Ho$ {bE H$s JB© àm¶mo{JH$ ì¶dñWm H$m {MÌ ~ZmB©¶o& àH$me {dÚwV
Ymam na Amn{VV àH$me H$s Vrd«Vm {Z¶V aIVo hþE {d^d H$m ³¶m à^md hmoVm h¡? J«m’$ ~ZmB©¶o&
[1+1+1=3]
What is photoelectric effect? Draw a diagram of experimental arrangement for
study of photoelectric effect. What is the effect of potential on photoelectric current
when intensity of incident light is constant. Draw graph.
AWdm/OR
AmB§ñQ>mBZ H$m àH$me {dÚwV g‘rH$aU {b{IE& Amn{VV àH$me H$s Amd¥{Îm  VWm {ZamoYr {d^d Vo Ho$
‘ܶ gå~ÝY ñWm{nV H$s{OE& Xmo {^Þ YmVwAm| Ho$ {bE {ZamoYr {d^d VWm Amn{VV àH$me H$s Amd¥{Îm Ho$ ‘ܶ
J«m’$ It{ME& [1+1+1=3]
Write Einstein’s photoelectric equation. Derive a relation between stopping potential
Vo and frequency  of incident light. Draw a graph between stopping potential and
frequency of incident light for two different metals.

IÊS> - X
SECTION - D

17) à˶mdVu Ymam H$m dJ© ‘mܶ ‘yb ‘mZ kmV H$s{OE& EH$ à˶mdVu Ymam n[anW ‘| C Ym[aVm dmbm g§Ym[aÌ OwS‹ >m
h¡ Bg n[anW ‘| CËnÞ g§Ym[aÌ à{VKmV Ed§ Ymam d dmoëQ>Vm Ho$ ‘ܶ H$bm gå~ÝY kmV H$s{OE& n[anW Ho$ {bE
’µ $o Oa AmaoI ~ZmB©¶&o [1+2+1=4]
Determine the root mean square value of alternating current. A capacitor of capacity
C is connected in an a.c. circuit. Find the capacitive reactance and phase relation
between current and voltage. Draw a phasor diagram for the circuit.

AWdm/OR

AZwZmX {H$go H$hVo h¢? AZwZmX H$s pñW{V ‘| loUr L-C-R n[anW H$s AZwZmXr Amd¥{Îm kmV H$s{OE& H$moUr¶
Amd¥{Îm  Ho$ gmW Ymam Ho$ n[adV©Z H$m AmboI ItMH$a g‘PmB©¶&o [1+2+1=4]
What is resonance? Determine the resonant frequency of series L-C-R circuit.
Draw a graph for angular frequency with variation of current and explain.

SS– 40–Physics 7032

19
18) {dMbZ H$moU {H$go H$hVo h¡?
§ H$m±M Ho$ {Ì^wOmH$ma {àÁ‘ go àH$me {H$aU Ho$ JwOaZo H$m {MÌ ~ZmB©¶&o {àÁ‘ Ho$
{bE {gÕ H$s{OE {H$

ݶyZV‘ {dMbZ D m  (n21  1) A

Ohm± n21 {àÁ‘ H$m AndV©Zm§H$ Ed§ {àÁ‘ H$moU h¡&
[1+1+2=4]

What is angle of deviation? Draw a diagram of ray of light passing through a
triangular glass prism. Prove for a prism that minimum deviation

D m  ( n21  1) A

where n21 is refractive index of prism and A is angle of prism.

AWdm/OR

b|g H$s j‘Vm go AmnH$m ³¶m Ame¶ h¡? g§¶º
w $ gyú‘Xeu Ûmam à{V{~å~ ~ZmZo H$m {H$aU {MÌ ~ZmH$a BgHo$
AmdY©Z H$m gyÌ kmV H$s{OE& [1+1+2=4]

What do you understand by power of lens? Draw a ray diagram for the formation
of image by a compound microscope and derive its formula for magnification.



SS– 40–Physics 7032

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