Rajasthan Board Class 12 Question Paper 2023 Physics

Rajasthan Board

QUESTION
PAPER

Zm_m§ H $ Roll No.

Tear Here
Sl.No. :

No. of Questions – 20
No. of Printed Pages – 11
SS–40–Physics

Cƒ _mÜ`{_H$ narjm, 2023
SENIOR SECONDARY EXAMINATION, 2023
^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.

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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«$‘m§H$ 19 d 20 ‘| AmÝV[aH$ {dH$ën h¢&

There are internal choices in Question Nos. 19 & 20.

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IÊS> - A
SECTION - A
1) ~hþ{dH$ën àíZ (i go ix) : {ZåZ àíZm| Ho$ CÎma H$m ghr {dH$ën H$m M¶Z H$a Xr JB© CÎma nwpñVH$m ‘| {b{IE :
Choose the correct answer from multiple choice questions (i to ix) and write in
given answer book.
i) ‘wº$ AmH$me ¶m {Zdm©V H$s {dÚwVerbVm H$m SI ‘mZ h¡- [1]
A) 9 × 10 Nm C
9 2 –2
~) 9 × 10 Nm C
–9 2 –2

g) 8.854 × 10 C N m–12 2 –1 –2
X) 8.854 × 10+12 C2N–1m–2
The SI value of permittivity of free space or vacuum is-
A) 9 × 109 Nm2C–2 B) 9 × 10–9 Nm2C–2
C) 8.854 × 10–12 C2N–1m–2 D) 8.854 × 10+12 C2N–1m–2
ii) ZrMo àX{e©V {MÌ ‘| a§J gyMH$ à{VamoYH$ ‘o à{VeV ghZVm (Q>mobaoÝg) hmoJr … [1]
nrbm

~¢JZr ^yam gwZham
A) 10% 5% ~)
g) 20% 15% X)
Tolerance (%) for colour coded resistor in the following figure will be:
Yellow

Violet Brown Gold
A) 10% B) 5%
C) 20% D) 15%
iii) bmoho H$m ³¶yar Vmn hmoVm h¡ … [1]
A) 1043 K ~) 1143 K
g) 893 K X) 317 K
Curie temperature of iron is
A) 1043 K B) 1143 K
C) 893 K D) 317 K

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 π
iv) à˶mdVu Ymam I = 200 sin  60π t +  ‘| {dÚwV Ymam H$s Amd¥{Îm hmoJr [1]
 6
A) 120 Hz ~) 60 Hz
g) 90 Hz X) 30 Hz

 π
Frequency of electric current of alternating current I = 200 sin  60π t + 
 6
will be
A) 120 Hz B) 60 Hz
C) 90 Hz D) 30 Hz
v) FM àgmaU Ho$ {bE g§Mma Amd¥{Îm ~¢S> namg h¡- [1]
A) 530 - 1710 MHz ~) 540 - 890 MHz
g) 88 -108 MHz X) 54 - 85 MHz
Communication frequency band range for FM broadcast is-
A) 530 - 1710 MHz B) 540 - 890 MHz
C) 88 -108 MHz D) 54 - 85 MHz
vi) CÎmb b|g H$s ’$moH$g Xÿar ³¶m hmoJr {OgH$s j‘Vm +2.5D h¡? [1]
A) 50 cm ~) 25 cm
g) 250 cm X) 40 cm
What will be the focal length of a convex lens whose power is +2.5D?
A) 50 cm B) 25 cm
C) 250 cm D) 40 cm
vii) 4π H$bm§Va Ho$ Vwë¶ nWmÝVa hmoVm h¡- [1]
A) 8λ ~) 2λ
g) 6λ X) 4λ
The path difference equivalent to 4π phase difference is-
A) 8λ B) 2λ
C) 6λ D) 4λ

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viii) 100 dmoëQ> {d^dmÝVa go Ëd[aV Bbo³Q´>m°Z go gå~Õ Xo-~«m°½br Va§JX¡Ü¶© h¡- [1]
A) 12.27 nm ~) 1.227 nm
g) 0.1227 nm X) 122.7 nm
De-Broglie wavelength associated with an electron, accelerated through a
potential difference of 100 volt is-
A) 12.27 nm B) 1.227 nm
C) 0.1227 nm D) 122.7 nm
ix) {MÌ ‘| Xem©¶o VH©$ n[anW H$s {ZJ©‘ (Y) hmoJr [1]

A) Y = A + B ~) Y=A+B
g) Y=A. B X) Y=A.B
The output (Y) of the logic circuit shown in the figure will be

A) Y=A+B B) Y=A+B
C) Y=A. B D) Y=A.B

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

Fill in the blanks (i) to (iv)

i) EH$g‘mZ Amdo{eV nVbo Jmobr¶ Imob Ho$ H$maU CgHo$ ^rVa pñWV g^r q~XþAm| na {dÚwV joÌ
................. hmoVm h¡& [1]

A uniformly charged thin spherical shell has an electric field at all points
_______ inside it.

ii) AY©MmbH$m| H$s à{VamoYH$Vm Vmn ‘| d¥{Õ hmoZo na ................. h¡& [1]

On increasing the temperature, the resistivity of semiconductors is ________.

iii) Xmo g‘mZ {Xem ‘| àdm{hV hmoZo dmbr {dÚwV YmamAm| Ho$ MmbH$mo Ho$ ‘ܶ ................ ~b h¡& [1]

The force between two parallel current carrying conductor is _________.

iv) àmW{‘H$ BÝÐYZwf ‘|, àH$me H$m .............. ~ma AndV©Z Ed§ .............. ~ma AmÝV[aH$ namdV©Z
hmoVm h¡& [1]

In the primary rainbow, light is refracted ________ and internally reflected
_______.

3) {ZåZ àíZm| (i go viii) Ho$ CÎma EH$ n§{³V ‘| Xr{OE :

Give the answer of the following questions (i to viii) in one line :

i) EH$b YZmdoe (q > 0) Ho$ H$maU {dÚwV joÌ aoImAm| H$mo Xem©BE& [1]

Show the electric field lines due to a single positive charge (q > 0).

ii) d¡ÚwV {ÛY«wd Ho$ H$maU BgHo$ Aj na pñWV {~ÝXþ na {dÚwV joÌ H$m ‘mZ {b{IE& [1]

Write the value of electric field due to an electric dipole at a point on its axis.

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iii) ñWm¶r Mwå~H$ ~ZmZo Ho$ {bE nXmW© H$s Xmo {deofVmE± {b{IE& [1]

Write two characteristics of a material to produce a permanent magnet.

iv) {ZåZ ‘| go Xmo AZwMw§~H$s¶ nXmW© N>m±{Q>E … [½+½=1]

gmo{S>¶‘ (Na), {~ñ‘W (Bi), Vm§~m (Cu), Eobw{‘{Z¶‘ (Al), grgm (Pb)

Select two paramagnetic material from the following:

Sodium (Na), Bismuth (Bi), Copper (Cu), Aluminum (Al), Lead (Pb)

v) {Zdm©V Z{bH$m ‘o¾oQ´>m°Z Ûmam CËnÞ {dÚwV Mwå~H$s¶ Va§J H$m Zm‘ {b{IE& [1]

Write the name of electromagneticwave produced by vacuum tube magnetron.

vi) EH$ AdVb Xn©U H$s dH«$Vm {ÌÁ¶m 28cm h¡, BgH$s ’$moH$g Xÿar hmoJr& [1]

The radius of curvature of a concave mirror is 28cm, its focal length will be?

vii) ’«o$Zb Xÿar, àH$me H$s Va§JX¡Ü¶© VWm ÛmaH$ H$s gmB©O ‘o g§~§Y ~VmZo dmbm gyÌ {b{IE& [1]

Write the formula which shows the relation between fresnel distance wavelength
of light and size of aperture.

viii) P - àH$ma Ho$ AÕ©MmbH$ ‘| ~hþg»
§ ¶H$ AmdoedmhH$ VWm Aëng§»¶H$ AmdoedmhH$ Ho$ Zm‘ {b{IE& [1]

Write name of majority charge carriers and minority charge carries in p-type
semiconductor.

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IÊS - ~
SECTION - B

4) 2×10–9C Amdoe Ho$ H$maU Bggo 9×10–4 ‘r. Xÿar na pñWV {H$gr {~ÝXþ na {dÚwV {d^d n[aH${bV H$s{OE&
[1½]
Calculate the electric potential at a point due to a charge of 2×10 C located 9×10–4m
–9

away from it.

5) VrZ {~ÝXþ Amdoemo Ho$ {ZH$m¶ H$s d¡ÚwV pñW{VO D$Om© H$m 춧OH$ àmá H$s{OE& [1½]
Find the expression for electric potential energy of a system of three point charges.
6) {H$gr n[anW ‘| 0.1s ‘| Ymam 5.0A go 1.0A VH$ {JaVr h¡& ¶{X Am¡gV ào[aV {dÚwV dmhH$ ~b 200V h¡ Vmo
n[anW ‘| ñdàoaH$Ëd H$m AmH$bZ H$s{OE& [1½]
Current in a circuit falls from 5.0A to 1.0A in 0.1s. If an average e.m.f. of 200V
induced. Give an estimate of the self inductance of the circuit.

7) {dÚwV Mwå~H$s¶ àoaU Ho$ {bE H$WZ {b{IE … [¾+¾=1½]
i) ’o$amS>o H$m {Z¶‘ ii) b|O H$m {Z¶‘
Write statement for electromagnetic induction
i) Faraday's law ii) Lenz's law

8) e{º$ JwUm§H$ H$m ‘mZ {ZåZm§{H$V n[anWmo Ho$ {bE kmZ H$s{OE … [¾+¾=1½]
i) ewÕ Ym[aVr¶ n[anW ii) loUr LCR AZwZmXr n[anW
Find out value of power factor for following circuit
i) Purely capacitive circuit ii) Series LCR resonance circuit

9) Q´>m§g’$m‘©a ‘| hmoZo dmbr {H$Ýht VrZ D$Om© j¶ (hm{Z) H$m C„oI H$s{OE& BÝh| H¡$go H$‘ {H$¶m Om gH$Vm h¡,
g‘PmB¶o& [1½]
Describe any three energy losses in transformers. How these can be minimized
explain?

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10) àH$me {dÚwV à^md H$s KQ>Zm ‘| {ZåZ H$mo n[a^m{fV H$s{OE& [¾+¾=1½]
i) H$m¶© ’$bZ
ii) {ZamoYr {d^d
Define the following in photoelectric effect phenomenon
i) work function
ii) stopping potential

11) ¶{X gr{O¶‘ YmVw H$m H$m¶©’$bZ 2.14eV h¡ Vmo BgH$s Xohbr Amd¥{Îm Hz ‘| kmZ H$s{OE& [1½]

If the work function of caesium metal is 2.14 eV then find its threshold frequency
in Hz.

12) hmBS´>moOZ na‘mUw H$s {ZåZV‘ AdñWm ‘| Hw$b D$Om© –13.6eV h¡& Bg Xem ‘| Bbo³Q´>m°Z H$s J{VO D$Om© VWm
pñW{VO D$Om© kmV H$ao& [¾+¾=1½]

The total energy of the electron in the ground state of Hydrogen atom is –13.6eV.
Find the kinetic energy and potential energy of electron in this state.

13) i) na‘mUw Ho$ aXa’$moS>© ‘m°S>b H$s Xmo H${‘¶m± {b{IE&
ii) hmBS´>moOZ ñno³Q´>‘ H$s Cg loUr H$m Zm‘ {b{IE {OgH$s aoImE± Ñí¶ àH$me joÌ ‘| n‹S>Vr h¡&
[1+½=1½]
i) Write two drawbacks of Rutherford's atomic model.
ii) Name the series of the hydrogen spectrum whose lines fall in the visible region.

14) ao{S>¶moEp³Q>d j¶Vm H$m {Z¶‘ {b{IE& {H$gr ao{S>¶moEp³Q>d VÎd H$m j¶ pñWam§H$ 0.693 à{V {‘ZQ> h¡& BgH$s
AY© Am¶w H$m ‘mZ {‘ZQ> ‘| kmV H$s{OE& [½+1=1½]

Write the law of radioactive decay. The decay constant of a radioactive substance
is 0.693 per minute. Calculate its half-life time in minute.

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15) {ZåZm§{H$V H$mo n[a^m{fV H$s{OE& [½+½+½=1½]
i) Zm{^H$s¶ g§b¶Z
ii) Zm{^H$s¶ {dIÊS>Z
iii) Ð춑mZ j{V
Define the following.
i) nuclear fusion
ii) nuclear fission
iii) mass defect

IÊS> - g
SECTION - C

16) ìhrQ>ñQ>moZ goVw H$m Zm‘m§{H$V n[anW {MÌ ~ZmH$a goVw ‘| eyݶ {djon Ho$ {bE à{V~ÝY H$s ì¶wËn{Îm H$s{OE&
[1+2=3]
Drawing a labelled circuit diagram of Wheatstone bridge, derive condition for zero
deflection in the bridge.

17) Eopån¶a H$m n[anWr¶ {Z¶‘ go EH$ A˶{YH$ bå~r Ymamdmhr n[aZm{bH$m Ho$ Aj na Mwå~H$s¶ joÌ H$m
춧OH$ àmá H$s{OE& Amdí¶H$ {MÌ ~ZmBE& [2+1=3]
Obtain an expression for magnetic field on the axis of current carrying very long
solenoid by Ampere's circuital law. Draw necessary diagram.

18) ì¶{VH$aU q’«$O à{Vê$n CËnÞ H$aZo Ho$ {bE ¶§J {Û-pñbQ> à¶moJ H$m Amdí¶H$ {MÌ ~ZmB¶o& àXrá q’«$Omo Ho$
{b¶o q’«$O Mm¡S>mB© H$m 춧OH$ ì¶wËnÞ H$s{OE& [1+2=3]
To produce interference fringe pattern, draw a necessary diagram of young's double
slit experiment. Derive an expression of fringe width for bright fringes.

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IÊS> - X
SECTION - D
19) AdVb Xn©U Ûmam à{V{~å~ aMZm H$m {H$aU {MÌ ~ZmH$a {~å~ H$s Xÿar (u) à{V{~å~ Xÿar (v) VWm ’$moH$g
Xÿar (f) ‘| g§~§Y ñWm{nV H$s{OE& [1+3=4]
Draw a ray diagram for image formation by concave mirror and establish a relation
between object distance (u), image distance (v) and focal length (f).
AWdm/OR
H$m±M Ho$ {Ì^wOmH$ma {àÁ‘ go {H$gr àH$me {H$aU Ho$ JwOaZo H$m {H$aU {MÌ ~ZmBE& ¶{X {àÁ‘ H$moU A hmo Vmo
 A + δm 
sin  
μ=  2  gå~ÝY H$m {ZJ‘Z H$s{OE&
A
sin  
2
(¶hm± μ = {àÁ‘ Ho$ nXmW© H$m AndV©Zm§H$ Ed§ δm = ݶyZV‘ {dMbZ h¡) [1+3=4]

Draw a ray diagram of light passing throught a triangular glass prism. If prism
 A + δm 
sin  
angle is A then deduce the relation μ =  2 
A
sin  
2
(where μ = refractive index of substance of prism and δm = minimum deviation)

20) {Xï>H$aU {H$go H$hVo h¡? nyU©Va§J {Xï>H$mar H$m n[anW {MÌ ~ZmH$a BgH$s H$m¶©{d{Y H$mo g‘PmB¶o& {Zdoer
à˶mdVu VWm {ZJ©‘ dmoëQ>Vm Ho$ Va§J àmê$n H$mo àX{e©V H$s{OE& [½+1+1½+½+½=4]
What is rectification? Draw the circuit diagram of full wave rectifier and explain its working.
Show the input ac voltage and output voltage waveforms from the rectifier circuit.
AWdm/OR
Z¡O AY©MmbH$ {H$go H$hVo h¡? p-n g§{Y {Z‘m©U H$s à{H«$¶m H$mo Amdí¶H$ {MÌ ~ZmH$a g‘PmB¶o&
{ZåZm§{H$V S>m¶moS>mo> H$m àVrH$ ~ZmBE& [½+1+1½+½+½=4]
i) OoZa S>m¶moS> ii) p-n g§{Y S>m¶moS>
What is intrinsic semiconductor? Explain the processes of p-n junction formation
with necessary diagram.
Draw the symbol of the following diodes
i) Zener diode ii) p-n junction diode

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SS–40–Physics 3028

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