Science (English Medium)
Academic Year: 2025-2026
Date & Time: 20th February 2026, 10:30 am
Duration: 3h
Advertisements
General Instructions:
Read the following instructions very carefully and strictly follow them:
- This question paper contains 33 questions. All questions are compulsory.
- This question paper is divided into five sections - Sections A, B, C, D and E.
- In Section A: Questions no. 1 to 16 are Multiple Choice type questions. Each question carries 1 mark.
- In Section B: Questions no. 17 to 21 are Very Short Answer type questions. Each question carries 2 marks.
- In Section C: Questions no. 22 to 28 are Short Answer type questions. Each question carries 3 marks.
- In Section D: Questions no. 29 and 30 are case study-based questions. Each question carries 4 marks.
- In Section E: Question numbers 31 to 33 are Long Answer type questions. Each question carries 5 marks.
- There is no overall choice given in the question paper. However, an internal choice has been provided in few questions in all the Sections except Section A.
- Kindly note that there is a separate question paper for Visually Impaired candidates.
- Use of calculator is not allowed.
You may use the following values of physical constants wherever necessary:
c = 3 × 108 m/s
h = 6.63 × 10−34 Js
e = 1.6 × 10−19 C
μ0 = 4π × 10−7 T m A−1
ε0 = 8.854 × 10−12 C2 N−1 m−2
`1/(4 pi epsilon_0)` = 9 × 109 N m2 C−2
Mass of electron (me) = 9.1 × 10−31 kg.
Mass of neutron = 1.675 × 10−27 kg.
Mass of proton = 1.673 × 10−27 kg.
Avogadro’s number = 6.023 × 1023 per gram mole
Boltzmann’s constant = 1.38 × 10−23 JK−1
In a region electric field is given by `vec E = 4 x hat i` N/C. The potential difference between points A(x = 1 m) and B(x = 3 m), (VA − VB) is ______.
−16 V
16 V
−8 V
8 V
Chapter:
In an unbiased p-n junction, at equilibrium, which of the following statements is true?
Diffusion current is zero but drift current exists.
Diffusion current exists but drift current is zero.
Diffusion and drift currents are equal and opposite.
Both the diffusion and drift currents exist but are unequal.
Chapter:
A copper wire is stretched to increase its length by 1%. Then the change in its resistance is close to ______.
1%
4%
−4%
2%
Chapter:
Four independent waves are expressed as:
- y1 = A1 sin ωt
- y2 = A2 sin 2ωt
- y3 = A3 cos ωt
- y4 = A4 sin(ωt + π/3)
The interference between two of these waves is possible in ______.
(i) and (iii) only
(iii) and (iv) only
(i), (iii) and (iv) only
All of them
Chapter:
A concave lens of focal length 40 cm is coaxially in contact with two convex lenses, each of focal length 20 cm, on each side. The focal length of the combination is ______.
zero
`20/3` cm
`-20/3` cm
`40/3` cm
Chapter:
The distance-of-closest-approach for an alpha particle is ‘d’ when it moves head-on with speed v towards a target nucleus. If the alpha particle is replaced by a proton moving with the same speed, the new distance-of-closest-approach will be ______.
2d
d
`d/2`
`d/sqrt2`
Chapter:
Advertisements
Electromagnetic waves used for purification of water are ______.
X-rays
Ultraviolet rays
Infrared rays
Ultrasonic rays
Chapter:
A conducting wire connects two charged metallic spheres A and B of radii r1 and r2 respectively. The distance between the spheres is very large compared to their radii. The ratio of electric fields (EA/EB) at the surfaces of spheres A and B will be ______.
`r_1/r_2`
`r_2/r_1`
`r_1^2/r_2^2`
`r_2^2/r_1^2`
Chapter:
A straight conductor lies along x-axis. It carries a current of 10 A along +x direction. The magnetic field `vec B` due to 1 cm segment of this conductor. centred at the origin, at a point (0, 1 m, 0) is ______.
`(1 nT) hat j`
`(10 nT) hat k`
`-(10 nT) hat k`
`-(1 nT) hat j`
Chapter:
The angular width of interference fringes in Young’s double-slit experiment depends on ______.
distance between the slits and the screen only.
wavelength of light used only.
both wavelength of light used and the slits separation.
slits separation only.
Chapter:
An electromagnetic wave passes from vacuum into a dielectric medium with relative electrical permittivity (3/2) and relative magnetic permeability (8/3). Then, its ______.
wavelength is doubled and frequency remains unchanged.
wavelength is doubled and frequency is halved.
wavelength is halved and frequency remains unchanged.
wavelength and frequency both will remain unchanged.
Chapter:
A resistor and an inductor of negligible resistance are connected in series to a 20 V ac source. If the voltage across the resistor is 12 V, the voltage across the inductor will be ______.
6 V
8 V
10 V
16 V
Chapter:
Advertisements
Assertion (A): In Bohr model of hydrogen atom, the energy levels are discrete and quantised.
Reason (R): In a hydrogen atom, the electrostatic force on the electron provides the necessary centripetal force to it to revolve around the nucleus.
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (А).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (А).
Assertion (A) is true, but Reason (R) is false.
Both Assertion (A) and Reason (R) are false.
Chapter:
Assertion (A): The mass of a nucleus is less than the sum of the masses of the constituent nucleons.
Reason (R): Energy is absorbed when the nucleons are bound together to form a nucleus.
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (А).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (А).
Assertion (A) is true, but Reason (R) is false.
Both Assertion (A) and Reason (R) are false.
Chapter:
Assertion (A): All atoms have a net magnetic moment.
Reason (R): A current loop does not always behave as a magnetic dipole.
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (А).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (А).
Assertion (A) is true, but Reason (R) is false.
Both Assertion (A) and Reason (R) are false.
Chapter:
Assertion (A): If accelerated electrons are passed through a narrow slit, a diffraction pattern is observed.
Reason (R): Electrons behave as both particles and waves.
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (А).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (А).
Assertion (A) is true, but Reason (R) is false.
Both Assertion (A) and Reason (R) are false.
Chapter:
A beam of light consisting of two wavelengths 400 nm and 600 nm is used to illuminate a single slit of width 1 mm. Find the least distance of the point from the central maximum where the dark fringes due to both wavelengths coincide on the screen placed 1.5 m from the slit.
Chapter:
In a Young’s double-slit experimental set-up with slit separation 0.6 mm a beam of light consisting of two wavelengths 440 nm and 660 nın is used to obtain interference pattern on a screen kept 1.5 m in front of the slits. Find the least distance of the point from the central maximum where the bright fringes due to both the wavelengths coincide.
Chapter:
Find the ratio `(lambda_a/lambda_p)` of the de Broglie wavelength λa associated with an alpha particle to de Broglie wavelength λp associated with a proton if both are moving with
- same velocity
- same kinetic energy.
Chapter:
Other Solutions
Submit Question Paper
Help us maintain new question papers on Shaalaa.com, so we can continue to help studentsonly jpg, png and pdf files
CBSE previous year question papers Class 12 Physics with solutions 2025 - 2026
Previous year Question paper for CBSE Class 12 Physics-2026 is solved by experts. Solved question papers gives you the chance to check yourself after your mock test.
By referring the question paper Solutions for Physics, you can scale your preparation level and work on your weak areas. It will also help the candidates in developing the time-management skills. Practice makes perfect, and there is no better way to practice than to attempt previous year question paper solutions of CBSE Class 12.
How CBSE Class 12 Question Paper solutions Help Students ?
• Question paper solutions for Physics will helps students to prepare for exam.
• Question paper with answer will boost students confidence in exam time and also give you an idea About the important questions and topics to be prepared for the board exam.
• For finding solution of question papers no need to refer so multiple sources like textbook or guides.
