NIOS CLASS 12TH Physics (312) SOLVED TMA In English Medium PDF SESSION 2025-26

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Applicable for:

March/April & October/November 2026 Examinations

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• Includes project work to make your submission 100% complete

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Questions Covered in This PDF:

1. Answer any one of the following questions in about 40-60 words.

(b) The steel ball is subjected to increasing pressure all around it. This pressure causes the ball to shrink slightly and develops stress inside it.
The data showing normal stress developed inside the steel ball corresponding to the volumetric strain is tabulated below:

2. Answer any one of the following questions in about 40-60 words.

 (a) Find the degree of freedom, Cp, Cv and total energy of a He molecule at 300 K temperature. 

3. Answer any one of the following questions in about 40-60 words.

 (b) The communication capacity of visible light in an optical fibre is about 100,000 times greater than that of a typical microwave in a metallic conductor. Explain.

4. Answer any one of the following questions in about 100 to 150 words.

Q4 (a) Consider an oscillatory system consisting of two blocks of masses m1 = 3 kg and m2 = 2 kg, connected by a massless spring with a spring constant k = 200 N/m. The blocks are pulled apart with equal forces of magnitude F = 5 N each and then
released. Calculate the angular frequency of each mass. Assume that the system moves on a smooth horizontal surface, and the center of mass remains stationary. 

5. Answer any one of the following questions in about 100 to 150 words.

(a) An object is placed at a distance of 6 cm from the first focus of a convex lens. The image is formed 24 cm away from the other focus.
(i) Find the focal length of the lens.
(ii) If the lens is made of glass with a refractive index of 1.5, calculate the radius of curvature of the lens surfaces (Assume it is a bi-convex lens with equal radii).
(iii) If an object is placed 36 cm from the lens, find the image distance.
(iv) What will be the magnification of the image formed in the above case? Is the image real or virtual? 

6. Prepare any one project out of the given below:

Q 6 (a) Docking is the process of connecting two satellites in space, where one (the chaser) approaches and attaches to another (the target). In its Space Docking Experiment (SpaDeX) mission, ISRO successfully docked two small spacecraft, Spacecraft A and Spacecraft B, each weighing about 220 kg. These satellites were orbiting Earth at around 28,800 km/h at an altitude of approximately 500 km.
During docking, their relative speed was gradually reduced to 0.036 km/h when they were 3 meters apart, ensuring a smooth connection.

Using the data given in the above paragraph, answer the following:
(i) Find the time taken by Spacecraft A (Chaser) to approach Spacecraft B (target) when they are 3 meters apart. (Assuming relative speed of 0.036 km/h to be constant during this approach).

(ii) Determine the value of the acceleration due to gravity (g) at 500 km altitude.

(iii) Estimate the orbital period of either satellite.

(iv) Calculate the gravitational potential energy of (Earth + Spacecraft A) system.

(v) Find the angular momentum of either satellite in S.I. as well as in c.g.s units.

(vi) The SpaDeX satellites were launched on a polar orbit using the Polar Satellite Launch Vehicle (PSLV) by ISRO to demonstrate spacecraft docking technology. List other applications of polar orbits and explain when they are termed as sun synchronous.
(Take radius of earth = 6.4 X 106 m and mass of earth = 6 X 1024 kg)

NOTE- You will get the answers of all these questions after purchasing the PDF.

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• Submission deadline:

- 31 January 2026 (For March/April Exam)

- 31 August 2026 (For October/November Exam)

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