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CBSE Class 12 Physics Sample Paper 2023

Class 12 Physics Sample Paper 2023

CBSE Class 12 Physics Sample Question Paper 2023 is now available on cbseacademic.nic.in .The Central Board Of Secondary Education has introduced Sample Papers for students of classes 10 and 12 Board. These Sample papers are on its official website. Students can also download the sample papers from here given below.
CBSE has introduced sample papers for all the subjects according to the layout of the question paper which CBSE is going to implement in this session 2022-23. This time, CBSE has introduced only one term examination, which will be conducted in February 2023. Along with CBSE Class 12 Physics Sample Question Paper 2023, CBSE also releases the Marking Scheme of CBSE Class 12 Physics Question Paper 2023. So that students can get a clear idea of the board exam format, question kinds, answer options, and other features with the help of CBSE Class 12 Physics Sample Question Paper 2023.
In this article, we have covered the CBSE Class 12 Physics Sample Paper. The students must solve CBSE Class 12 Physics Sample Paper which is given on this page and bookmark this page to get all the latest updates from CBSE regarding CBSE Annual Exam.

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Class 12 Physics Sample Question Paper 2023- Questions with Answers

•Maximum Marks: 70 Marks

•Time Allowed: 3 hours.
General Instructions:
(1) There are 35 questions in all. All questions are compulsory
(2) This question paper has five sections: Section A, Section B, Section C, Section D and Section E. All the sections are compulsory.
(3) Section A contains eighteen MCQ of 1 mark each, Section B contains seven questions of two marks each, Section C contains five questions of three marks each, section D contains three long questions of five marks each and Section E contains two case study based questions of 4 marks each.
(4) There is no overall choice. However, an internal choice has been provided in section B, C, D and E. You have to attempt only one of the choices in such questions.
5. Use of calculators is not allowed.

Class 12 Physics Sample Question Paper 2023: SECTION – A

SECTION A (1 mark each)

Q.1.According to Coulomb’s law, which is the correct relation for the following figure?

CBSE Class 12 Physics Sample Paper 2023_40.1

(i) q1 q2> 0

(ii) q1 q2<0

(iii) q1 q2 =0

(iv) 1> q1/ q2 > 0

Q.2. The electric potential on the axis of an electric dipole at a distance ‘r from it’s centre is V. Then the potential at a point at the same distance on its equatorial line will be
(i) 2V
(ii) -V
(iii) V/2
(iv) Zero

Q.3 The temperature (T) dependence of resistivity of materials A and material B is represented by fig (i) and fig (ii) respectively. Identify material A and material B.

CBSE Class 12 Physics Sample Paper 2023_50.1

(i) material A is copper and material B is germanium
(ii) material A is germanium and material B is copper
(iii) material A is nichrome and material B is germanium
(iv) material A is copper and material B is nichrome

Q.4.Two concentric and coplanar circular loops P and Q have their radii in the ratio 2:3. Loop Q carries a current 9 A in the anticlockwise direction. For the magnetic field to be zero at the common centre, loop P must carry
(i) 3A in clockwise direction
(ii) 9A in clockwise direction
(iii) 6 A in anti-clockwise direction
(iv) 6 A in the clockwise direction

Q.5.A long straight wire of circular cross section of radius a carries a steady current I. The current is uniformly distributed across its cross section. The ratio of the magnitudes of magnetic field at a point distant a/2 above the surface of wire to that at a point distanta/2 below its surface is
(i) 4 :1
(ii) 1:1
(iii) 4: 3
(iv) 3 :4
Q.6. If the magnetizing field on a ferromagnetic material is increased, its permeability
(i) decreases
(ii) increases
(iii) remains unchanged
(iv) first decreases and then increases
Q.7. An iron cored coil is connected in series with an electric bulb with an AC source as shown in figure. When iron piece is taken out of the coil, the brightness of the bulb will

CBSE Class 12 Physics Sample Paper 2023_60.1

(i) decrease
(ii) increase
(iii) remain unaffected
(iv) fluctuate
Q.8. Which of the following statement is NOT true about the properties of electromagnetic waves?
(I) These waves do not require any material medium for their propagation
(ii) Both electric and magnetic field vectors attain the maxima and minima at the same time
(iii) The energy in electromagnetic wave is divided equally between electric and magnetic fields
(iv) Both electric and magnetic field vectors are parallel to each other

Q.9. A rectangular, a square, a circular and an elliptical loop, all in the (x-y) plane, are moving out of a uniform magnetic field with aconstant velocity 𝑣⃗ = v𝚤̂.The magnetic field is directed along the negative z-axis direction. The induced emf, during the passage of these loops, out of the field region, will not remain constant for
(i) any of the four loops
(ii) the circular and elliptical loops
(iii) the rectangular, circular and elliptical loops
(iv) only the elliptical loops
Q.10. In a Young’s double slit experiment, the path difference at a certain point on the screen between two interfering waves is 𝟏/𝟖 th of the wavelength. The ratio of intensity at this point to that at the centre
of a bright fringe is close to
(i) 0.80
(ii) 0.74
(iii) 0.94
(iv) 0.85

Q.11. The work function for a metal surface is 4.14 eV. The threshold wavelength for this metal surface is:
(i) 4125 Å
(ii) 2062.5 Å
(iii) 3000 Å
(iv) 6000 Å

Q.12. The radius of the innermost electron orbit of a hydrogen atom is 5.3×10–11 m. The radius of the n =3 orbit is
(i) 1.01 x 10-10m
(ii) 1.59 X 10-10m
(iii) 2.12 x 10-10m
(iv) 4.77 X 10-10m

Q.Which of the following statements about nuclear forces is not true?
(i) The nuclear force between two nucleons falls rapidly to zero as their distance is more than a few femtometres.
(ii) The nuclear force is much weaker than the Coulomb force.
(iii) The force is attractive for distances larger than 0.8 fm and repulsive if they are separated by distances less than 0.8 fm.
(iv) The nuclear force between neutron-neutron, proton-neutron and proton-proton is approximately the same.

Q.14 If the reading of the voltmeter V1 is 40 V, then the reading of voltmeter V2 is

CBSE Class 12 Physics Sample Paper 2023_70.1

(i) 30 V (ii) 58 V (iii) 29 V (iv) 15 V

Q.15.The electric potential V as a function of distance X is shown in the figure.

CBSE Class 12 Physics Sample Paper 2023_80.1

The graph of the magnitude of electric field intensity E as a function of X is

CBSE Class 12 Physics Sample Paper 2023_90.1

Q. 16 Two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true and R is NOT the correct explanation of A

c) A is true but R is false
d) A is false and R is also false
ASSERTION(A): The electrical conductivity of a semiconductor increases on doping.
REASON: Doping always increases the number of electrons in the semiconductor

Q.17. Two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true and R is NOT the correct explanation of A
c) A is true but R is false
d) A is false and R is also false

ASSERTION:

In an interference pattern observed in Young’s double slit experiment, if the separation (d) between coherent sources as well as the distance (D) of the screen from the coherent sources both are reduced to 1/3rd,then new fringe width remains the same.

REASON:
Fringe width is proportional to (d/D).

Q.18. Two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.
a) Both A and R are true and R is the correct explanation of A
b Both A and R are true and R is NOT the correct explanation of A
c) A is true but R is false
d) A is false and R is also false
Assertion(A) :
The photoelectrons produced by a monochromatic light beam incident on a metal surface have a spread in their kinetic energies.
Reason(R) :
The energy of electrons emitted from inside the metal surface, is lost in collision with the other atoms in the metal.

Class 12 Physics Sample Question Paper 2023: SECTION – B

SECTION B (2 marks each)

Q.19. Electromagnetic waves with wavelength
(i) λ1 is suitable for radar systems used in aircraft navigation.
(ii) λ2 is used to kill germs in water purifiers.
(iii) λ3 is used to improve visibility in runways during fog and mist conditions.
Identify and name the part of the electromagnetic spectrum to which these
radiations belong.Also arrange these wavelengths in ascending order of their
magnitude.
Q.20. A uniform magnetic field gets modified as shown in figure when two specimens A and B are placed in it.

CBSE Class 12 Physics Sample Paper 2023_100.1

(i)Identify the specimen A and B.
(ii) How is the magnetic susceptibility of specimen A different from that of specimen B?

Q.21. What is the nuclear radius of 125Fe ,if that of 27 Al is 3.6 fermi?.
OR
The short wavelength limit for the Lyman series of the hydrogen spectrum is 913.4 A0. Calculate the short wavelength limit for the Balmer series of the hydrogen spectrum.

Q.22.A biconvex lens made of a transparent material of refractive index 1.25 is immersed in water of refractive index 1.33. Will the lens behave as a converging or a diverging lens? Justify your answer.

Q.23. The figure shows a piece of pure semiconductor S in series with a variable resistor R and a source of constant voltage V. Should the value of R be increased or decreased to keep the reading of the ammeter
constant, when semiconductor S is heated? Justify your answer.

CBSE Class 12 Physics Sample Paper 2023_110.1

The graph of potential barrier versus width of depletion region for an unbiased diode is shown in graph A. In comparison to A ,graphs B and C are obtained after biasing the diode in different ways .Identify the
type of biasing in B and C and justify your answer.

CBSE Class 12 Physics Sample Paper 2023_120.1

Q.24.A narrow slit is illuminated by a parallel beam of monochromatic light of wavelength λ equal to 6000 Å and the angular width of the central maximum in the resulting diffraction pattern is measured. When the slit
is next illuminated by light of wavelength λ’, the angular width decreases by 30%. Calculate the value of the wavelength λ’.
Q.25.Two large, thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs and of magnitude 17.7 × 10-22 C/m².What is electric field intensity
E:
(a) in the outer region of the first plate, and
(b) between the plates?

Class 12 Physics Sample Question Paper 2023: SECTION – C

SECTION C (3 marks each)

Q.26. Two long straight parallel conductors carrying currents I1 and I2 are separated by a distance d. If the currents are flowing in the same direction, show how the magnetic field produced by one exerts an
attractive force on the other. Obtain the expression for this force and hence define 1 ampere.

Q.27. The magnetic field through a circular loop of wire, 12cm in radius and 8.5Ω resistance, changes with time as shown in the figure. The magnetic field is perpendicular to the plane of the loop. Calculate the current induced in the loop and plot a graph showing induced current as a function of time.

CBSE Class 12 Physics Sample Paper 2023_130.1

Q.28. An a.c. source generating a voltage ε = ε0 sin ωt is connected to a capacitor of capacitance C. Find the expression for the current I flowing through it. Plot a graph of ε and I versus t to show that the current is
ahead of the voltage by π/2.
OR
An ac voltage V = V0 sin t is applied across a pure inductor of inductance L. Find an expression for the current i, flowing in the circuit and show mathematically that the current flowing through it lags behind
the applied voltage by a phase angle of π/2. Also, draw graphs of V and i versus ωt for the circuit.

Q.29. Radiation of frequency 1015 Hz is incident on three photosensitive surfaces A, B and C. Following observations are recorded:
Surface A: no photoemission occurs
Surface B: photoemission occurs but the photoelectrons have zero kinetic energy.
Surface C: photo emission occurs and photoelectrons have somekinetic energy.
Using Einstein’s photo-electric equation, explain the three observations.
OR
The graph shows the variation of photocurrent for a photosensitive metal

CBSE Class 12 Physics Sample Paper 2023_140.1

(a)What does X and A on the horizontal axis represent?
(b)Draw this graph for three different values of frequencies of incident radiation ʋ1, ʋ 2 and ʋ 3 (ʋ 3>ʋ 2>ʋ1) for the same intensity.
(c) Draw this graph for three different values of intensities of incident radiation I1, I2 and I3 (I3> I2>I1) having the same frequency.
Q.30. The ground state energy of hydrogen atom is -13.6 eV. The photon emitted during the transition of electron from n=3 to n=1 state, is incident on a photosensitive material of unknown work function .The
photoelectrons are emitted from the material with the maximum kinetic energy of 9eV.Calculate the threshold wavelength of the material used.

Class 12 Physics Sample Question Paper 2023: SECTION – D

SECTION D (5 marks each)

Q.31. (a)Draw equipotential surfaces for (i)an electric dipole and (ii) two identical positive charges placed near each other.
(b) In a parallel plate capacitor with air between the plates, each plate has an area of 6 x 10-³m² and the separation between the plates is 3 mm.
(i) Calculate the capacitance of the capacitor.
(ii) If the capacitor is connected to 100V supply, what would be the the charge on each plate?
(iii) How would charge on the plate be affected if a 3 mm thick mica sheet of k=6 is inserted between the plates while the voltage supply remains connected ?

OR
(a)Three charges –q, Q and –q are placed at equal distances on a straight line. If the potential energy of the system of these charges is zero, then what is the ratio Q:q?
(b)(i) Obtain the expression for the electric field intensity due to a uniformly charged spherical shell of radius R at a point distant r from the centre of the shell outside it.
(ii) Draw a graph showing the variation of electric field intensity E with r, for r > R and r < R.

Q.32.(a) Explain the term drift velocity of electrons in a conductor .Hence obtain the expression for the current through a conductor in terms of drift velocity.
(b) Two cells of emfs E1 and E2 and internal resistances 𝑟¹and 𝑟² respectively are connected in parallel as shown in the figure. Deduce the expression for the
(i) equivalent emf of the combination
(ii) equivalent internal resistance of the combination
(iii) potential difference between the points A and B.

CBSE Class 12 Physics Sample Paper 2023_150.1

OR
(a) State the two Kirchhoff’s rules used in the analysis of electric circuits and explain them.
(b) Derive the equation of the balanced state in a Wheatstone bridge using Kirchhoff’s laws.

Q.33. a) Draw the graph showing intensity distribution of fringes with phase angle due to diffraction through a single slit. What is the width of the central maximum in comparison to that of a secondary maximum?
b) A ray PQ is incident normally on the face AB of a triangular prism of refracting angle 600 as shown in figure.
The prism is made of a transparent material of refractive index 2/√3. Trace the path of the ray as it passes through the prism. Calculate the angle of emergence and the angle of deviation.

CBSE Class 12 Physics Sample Paper 2023_160.1

 

OR
a) Write two points of difference between an interference pattern and a diffraction pattern.
b) (i) A ray of light incident on face AB of an equilateral glass prism, shows minimum deviation of 30°. Calculate the speed of light through the prism.

CBSE Class 12 Physics Sample Paper 2023_170.1

(ii) Find the angle of incidence at face AB so that the emergent ray grazes along the face AC

Class 12 Physics Sample Question Paper 2023: SECTION – E

SECTION E 

Q.34. Case Study :
Read the following paragraph and answer the questions.
A number of optical devices and instruments have been designed and developed such as periscope, binoculars,
microscopes and telescopes utilising the reflecting and refracting properties of mirrors, lenses and prisms. Most of them are in common use. Our knowledge about the formation of images by the mirrors and lenses is the basic requirement for understanding the working of these devices.
(i) Why the image formed at infinity is often considered most suitable for viewing. Explain
(ii) In modern microscopes multicomponent lenses are used for both the objective and the eyepiece. Why?
(iii) Write two points of difference between a compound microscope and an astronomical telescope
OR
(iii) Write two distinct advantages of a reflecting type telescope over a refracting type telescope.

Q.35. Case study: Light emitting diode.
Read the following paragraph and answer the questions
LED is a heavily doped P-N junction which under forward bias emits spontaneous radiation. When it is forward biased, due to recombination of holes and electrons at the junction, energy is released in the form of
photons. In the case of Si and Ge diode, the energy released in recombination lies in the infrared region. LEDs that can emit red, yellow, orange, green and blue light are commercially available. The semiconductor used for fabrication of visible LEDs must at least have a band gap of 1.8 eV. The compound semiconductor Gallium Arsenide –Phosphide is used for making LEDs of different colours.

CBSE Class 12 Physics Sample Paper 2023_180.1

LEDs of different kinds
(i). Why are LEDs made of compound semiconductor and not of elemental semiconductors?
(ii) What should be the order of bandgap of an LED, if it is required to emit light in the visible range?
(iii) A student connects the blue coloured LED as shown in the figure.The LED did not glow when switch S is closed. Explain why ?

CBSE Class 12 Physics Sample Paper 2023_190.1

OR

(iii) Draw V-I characteristic of a p-n junction diode in (i) forward bias and (ii) reverse bias

Class 12 Physics Sample Question Paper 2023 with Solutions

Class 12 Physics Sample Question Paper 2023 Pdf Download

Here we are given the  CBSE Class 12 Physics Sample Question Paper 2023 in pdf format. Students can download and take a print of CBSE Class 12 Physics Sample Question Paper 2023. Check CBSE Class 12 Physics Sample Paper 2023 PDF Download on Adda247

CBSE Class 12 Physics Sample Question Paper 2023 – SQP

 

Class 12 Physics Sample Question Paper 2023: Marking Scheme

Check CBSE Class 12 Physics Sample Paper 2023 Marking Scheme on Adda247

CBSE Class 12 Physics Sample Question Paper 2023 Marking Scheme

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Class 12 Physics Sample Question Paper 2023- FAQs

Q. Where can I get CBSE Class 12 Physics Sample Question Paper 2023?

The Central Board of Secondary education has released CBSE Class 12 Physics Sample Question Paper 2023 at cbseacademic.nic.in. On this page, we provide CBSE Class 12 Physics Sample Question Paper 2023 pdf. You can download it from the page.

Q. Does CBSE cut marks for handwriting?

Although it is important to write in legible handwriting but students will not get any extra marks for good handwriting.

Q. Do the exam evaluators give marks based on a good presentation on the answer sheet?
No, there is no provision to give marks for a good presentation. However, students should concentrate on writing well-structured, neat, and highlighted answers. Students can also see the CBSE toppers answer sheet to learn how to write an answer.

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