Organisation : Board of School Education Haryana (BSEH)
Exam : Senior Secondary Exam (Class 12th)
Document Type : Question Paper
Subject : Physics
Year : March 2025
Website : https://bseh.org.in/srsec-old-question-paper-march-2025
BSEH Haryana Class 12th Physics Question Paper
Download Board of School Education Haryana (BSEH) Senior Secondary Exam (Class 12th) March 2025 Physics Question Paper.
Related / Similar Question Paper : BSEH Haryana Class 12th Physical Education Question Paper March 2025
BSEH Haryana Class 12th Physics Questions
Section-A : [ Objective Type Questions ]
Select the correct option of the following multiple choice questions :
1. 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. 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. 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. Which quantity is increased in a step-up transformer ?
(A) current
(B) voltage
(C) power
(D) frequency
5. In glass, the velocity of the light is minimum for :
(A) red
(B) violet
(C) yellow
(D) green
6. 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) 2 n β
7. 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. Which of the following particle has mass equal to that of electron ?
(A) neutron
(B) proton
(C) positron
(D) neutrino
9. 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
Answer the following questions in one word/sentence :
10. What is balanced condition of Wheatstone bridge ?
11.Write SI unit of magnetic flux density.
12.What is the resistivity of pure semi-conductor at absolute zero ?
Fill in the blanks :
13.Electron volt (eV) is the unit of …………… . _
14. All atoms except …………… contain neutron in their nuclei.
15.A depletion layer consists of …………… .
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 :
16. 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.
17. 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.
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