Physics | Technical Stream | Question Paper 2082-2025 of Class 12 | NEB - PDF Download

Physics Technical Stream Question Paper 2082-2025 of Class 12 NEB PDF Download (Subject Code 9131).

Download Physics Technical Stream Question Paper 2082-2025 of Class 12 NEB (Subject Code 9131) in PDF. For civil, computer, and electrical engineering students with registration numbers starting from 79, 80, and 81.

• Physics Technical Stream Question Paper 2082-2025 of Class 12 NEB
• NEB Physics Technical Stream Question Paper 2082
• Class 12 Physics Technical Stream 2082 PDF
• NEB Physics 9131 Question Paper 2025
• Physics Technical Stream Paper 2082 NEB PDF Download

The Physics Technical Stream Question Paper 2082-2025 of Class 12 NEB with subject code 9131 is an important resource for students studying in the Technical Stream under the National Examination Board (NEB) of Nepal. This question paper is designed specifically for students from civil, computer, and electrical engineering streams whose registration numbers begin with 79, 80, and 81. By downloading the Physics Technical Stream Question Paper 2082-2025 of Class 12 NEB, students can clearly understand the exam pattern, marking scheme, and the types of numerical and theoretical questions asked in the board examination. It helps learners evaluate their preparation level and practice effectively before the final exams.

Students preparing for the board exam can greatly benefit from solving the Physics Technical Stream Question Paper 2082-2025 of Class 12 NEB because it provides real exam-level questions based on the NEB curriculum. Practicing this paper improves problem-solving skills, strengthens conceptual understanding, and boosts confidence during the examination. If you are a Technical Stream student from civil, computer, or electrical engineering with registration numbers starting from 79, 80, or 81, downloading this Physics Technical Stream Question Paper 2082-2025 of Class 12 NEB in PDF format will be a valuable step toward effective exam preparation.

The Exam Question Papers provided below - Physics Technical Stream Question Paper 2082-2025 of Class 12 NEB of the board exam 2082-2025 for civil, computer, electrical engineering students and is based on the latest NEB Syllabus for the year 2079 and onwards. We will be adding more Exam Question Papers of grade xii- class 12 later on. Scroll down to Download Physics Technical Stream Question Paper 2082-2025 of Class 12 NEB Sub. Code: 9131 in pdf format which is 349 kb in size. Enjoy!

So, check and Download Class 12 Physics Technical Stream 2080-2082 Question Paper in PDF format.

Physics | Technical Stream | Question Paper 2082-2025 of Class 12 | NEB - PDF Download.

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Physics Technical Stream Question Paper 2082-2025 of Class 12 NEB PDF Download.

NATIONAL EXAMINATIONS BOARD [NEB]

Physics 'Technical Stream'

Grade XII-Class 12

For Regular and Partial Technical Stream Students

Examination – 2082 (2025)

(New Course)

Subject Code: 9131

Full Marks – 75

Time - 3 hrs

Check this ...

Grade 12 Physics Exam Question Paper of the year 2080-2023 (New Course) | PDF Download.

(For regular and partial technical stream (civil/computer/electrical engineering) students whose first two digits of registration number starts from 79, 80 and 81)

Candidates are required to give their answers in their own words as far as practicable. The figures in the margin indicate full marks.

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Physics | Technical Stream Question Paper 2082-2025 of Class 12 | NEB | Code: 9131 | PDF Download.

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Health and Physical Education | Old Course | Question Paper 2082-2025 of Class 12 | NEB | Code: 244 | PDF Download.

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Attempt all the questions.

Group 'A'  [11x1=11]

Rewrite the correct option of each question in your answer sheet.

1. The moment of Linear momentum is called

(A) Torque

(B) Force
(C) Couple

(D) Angular momentum

2. A liquid does not wet the surface of a solid if the angle of contact is

(A) Zero

(B) Less than 90⁰
(C) Greater than 90⁰

(D) Less than zero

3. In a thermodynamic process, if the volume remains constant, then the process is known as

(A) Isothermal

(B) Isobaric
(C) Adiabatic

(D) Isochoric

4. A system suffers an increase in internal energy of 80 Joules and at the same time 50 Joules of work is done on the system. What is the value of heat supplied ?

(A) +130J

(B) +30J
(C) -130J

(D) -30J

5. The reciprocal of wavelength is called

(A) Velocity

(B) Wave frequency
(C) Amplitude

(D) Wave number

6. The distance between any two consecutive nodes in terms of wavelength (𝜆) in a stationary wave is

(A) ? ∕ 2
(B) ? ∕ 4
(C) 𝜆

(D) 2𝜆

7. For a diamagnetic material, which of the following statement is correct for the magnetic susceptibility (𝜒) ?

(A) 𝜒 > 0

(B) 𝜒 < 1

(C) 𝜒 = 0

(D) 𝜒 = 1

8. Kirchhoff 's voltage law is based on the principle of conservation of

(A) Charge

(B) Linear momentum
(C) Energy

(D) Mass

9. Which of the following graphs represents correctly the variation of photoelectric current (Ip) with the intensity (I) of the radiation.

10. If K.E. of a particle is increased by four times then the de-Broglie wavelength becomes

(A) 2 times

(B) 1 ∕ 2 times
(C) 1 ∕ √2 times

(D) √2 times

11. During the reverse biasing of a P-N Junction diode, thickness of depletion Layer

(A) Decreases

(B) Increases
(C) First increases than decreases

(D) Remains constant

Group 'B' [8x5=40]

12.

a) Define moment of inertia. Write any two factors on which it depend. [2]
b) Obtain an expression for the moment of inertia of a thin uniform rod about an axis passing through its centre and perpendicular to its length. [2]
c) State the principle of conservation of angular momentum. [1]

13.

a) Define surface tension. [1]
b) Show that surface tension of liquid is numerically equal to the surface energy. [2]
c) Define capillarity with two suitable examples. [2]

14.

a) What correction was made by Laplace on Newton's formula ? Obtain the corrected formula. [3]
b) At what temperature the speed of sound is increased by 50% to that at 270C ? [2]

15.

a) Define harmonics. [1]
b) Describe the various modes of vibration of air column in an open organ pipe. [3]
c) What is end correction of an organ pipe ? [1]

16.

a) What is meant by diffraction of light ? [1]
b) Write the necessary condition for diffraction of light. [1]
c) Interference occurs due to the superposition of two waves produced by the coherent sources.
i) Define coherent sources. [1]
ii) Write the required condition for constructive and destructive interference. [2]

17.

a) State the principle of potentiometer. [1]
b) Why do we prefer potentiometer to measure emf of a cell rather than a voltmeter ? Justify. [2]
c) State two Kirchhoff's laws of electrical circuit. [2]

Or
a) State and explain Biot-Savart's law. [2]
b) Obtain an expression for magnetic field intensity at the centre of a current carrying circular coil using Biot-Savart's law. [3]

18.

a) How can a galvanometer be converted into an ammeter ? Explain. [3]
b) Why is an ammeter connected in series in a circuit ? Justify. [2]

19.

a) State and explain Einstein photo electric equation. Also, define threshold frequency. [3]
b) If 5ev photon strikes on a surface of a metal of work function 1.8ev, calculate the maximum speed of the emitted electron.[2]
(h = 6.62x10⁻³⁴Js), [Mass of an electron (m) = 9.1x10⁻³¹kg]
[Charge on an electron (e) = 1.6x10⁻¹⁹C]

Or
a) Define rectifier. [1]
b) Explain with a neat diagram of full wave rectifier using two semi-conductor diodes. [3]
c) Plot input and output waveforms of full wave rectifier. [1]

Group 'C' [3x8=24]

20.

a) Define simple harmonic motion. [1]
b) A simple harmonic motion is given as Y = asin(wt - kx), where symbols have their usual meanings. Find its acceleration. [2]
c) Show that the oscillation of mass suspended from a helical spring is simple harmonic motion. [3]
d) A body of mass 200gm is executing SHM with amplitude of 20mm. The maximum force which acts upon it is 0.8N. Calculate the maximum velocity of the body. [2]

21.

a) Define r.m.s value of an ac. [1]
b) How rms value of an ac is related to the peak value ? [1]
c) Show that current through a pure inductor Lags behind voltage by a phase angle 𝜋 ∕ 2. Also draw its phasor diagram. [3]
d) A series LCR circuit is shown in figure below.

Calculate the impedance and current in the circuit. [3]

22.

a) Define cross field. [1]
b) Show that the motion of an electron in a magnetic field is circular. Also, determine its time period. [3]
c) An electron and proton are projected with the same speed in a uniform magnetic field normally. Compare the radius of their circular paths. [2]
d) Calculate the radius of a water drop which would just remains suspended in a electric field of 3x10⁴ V/m and charged with one electron. [2]

Or
a) Define ionization potential. [1]
b) Which spectral series of hydrogen atom lie within visible region ? Calculate the longest wave length of that series. (R = 1.097x10⁻⁷m⁻¹) [3]
c) How do you control quality of X-rays ? Explain. [2]
d) Calculate the de-Broglie wave length of X-rays having K.E of 200ev. (Mass of electron = 9.1x10⁻³¹kg) [2]

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