Getting stuck on the NIOS Class 12 Physics 312 Solved TMA is one of the quiet reasons students leak easy internal marks, because a Physics assignment mixes short conceptual answers with numerical working that has to be shown step by step. This page lays out the complete October 2026 assignment, question by question, and then hands you two fully worked sample answers so you can weigh our quality yourself before you decide to pick up the whole set.
By Prateek Talwar | Reviewed by Jyoti Sharma, Senior NIOS Counsellor | Last updated: [VERIFY DATE]
10,000+ NIOS students supported | Prepared from the official Physics 312 book | Typed and handwritten formats
We build every answer after reading the prescribed lesson for that question in the official NIOS Physics 312 textbook, not by guessing from memory. That way each solution uses the same symbols, units and reasoning your evaluator expects to see, which is exactly what earns the tutor-marked component its 40 percent share of the subject.
What the NIOS Class 12 Physics 312 Solved TMA Covers in 2026
The October 2026 assignment carries six main questions drawn from the twelve tutor-marked lessons of the Physics 312 course, spanning mechanics, elasticity, thermal physics, oscillations, optics and communication systems. Questions one to three ask for compact 40 to 60 word answers, questions four and five want 100 to 150 word explanations, and question six is a longer project with several sub-parts.
Because most questions offer an "answer any one" choice, our solved set works through the option that is quicker to defend in front of an evaluator while still showing full reasoning. If you are new to how this internal component is graded, our explainer on the NIOS TMA walks through submission rules, deadlines and the marks it feeds into your result.
Every answer in the paid set is matched to its source lesson, so a student can open the textbook alongside the solution and see precisely where each figure and formula comes from. This traceability is what separates a genuine solved assignment from a copy-pasted one.
Full List of NIOS Class 12 Physics 312 TMA Questions 2026
Here is the complete assignment reproduced from the official October 2026 paper. Each item shows the source lesson so you can cross-check against your own book. The two questions marked with a sample badge have their full worked answers in the next section.
| Q.No | Question (as printed in the assignment) | Source lesson |
|---|---|---|
| 1 (a) | Hooke's Law states that within the elastic limit stress is proportional to strain. Since there are different types of strain, can one modulus of elasticity explain all material behaviour under stress? Explain how each type of strain relates to a different modulus. Sample below | Lesson 8 |
| 1 (b) | A steel ball under all-round pressure shows a constant ratio of normal stress to volumetric strain (160 × 10⁹ N/m²). Explain why this ratio stays unchanged, what the constant is called and its SI unit. | Lesson 8 |
| 2 (a) | Find the degrees of freedom, Cᵧ, Cᵛ and total energy of a helium molecule at 300 K. | Lesson 10 |
| 2 (b) | An insulated iron rod (40.0 cm long, 4.0 cm diameter) connects an ice reservoir to a boiling-water reservoir. With thermal conductivity 79 W m⁻¹ K⁻¹, find the rate and direction of heat flow. Sample below | Lesson 12 |
| 3 (a) | For an AM system with modulating signal Vₓ = 5 sin 3140t and upper side band frequency 4.5 × 10⁵ Hz, find the angular frequency of the carrier wave. | Lesson 30 |
| 3 (b) | Explain why the communication capacity of visible light in an optical fibre is about 100,000 times greater than a typical microwave in a metallic conductor. | Lesson 30 |
| 4 (a) | Two blocks (3 kg and 2 kg) joined by a spring of constant 200 N/m are pulled apart by equal 5 N forces and released. Find the angular frequency of each mass with the centre of mass stationary. | Lesson 13 |
| 4 (b) | Conduct a home experiment on a simple pendulum, measure the time period, calculate g, and discuss whether mass affects T and how T would change on the Moon. | Lesson 13 |
| 5 (a) | An object sits 6 cm from the first focus of a convex lens and its image forms 24 cm beyond the second focus. Find the focal length, radii of curvature, image distance at 36 cm and the magnification. | Lesson 20 |
| 5 (b) | Explain the construction and working of a large concave-mirror star-gazing instrument with a ray diagram, and why it beats a large convex-lens design. | Lesson 23 |
| 6 (a) | Project on ISRO's SpaDeX docking: approach time, value of g at 500 km, orbital period, gravitational potential energy, angular momentum in SI and CGS, and polar or sun-synchronous orbit uses. | Lessons 1, 2, 5, 7 |
| 6 (b) | Project on a struck cricket ball as projectile motion: complete the velocity and displacement table, find maximum height and range, and identify the complementary angle for the same range. | Lesson 4 |
A full walk-through of how these questions connect to the wider syllabus is easier once you have seen the whole NIOS Study Material map for Class 12 Science, since Physics leans on topics you first met in the earlier motion and gravitation lessons.
Sample Answers from Our NIOS Physics 312 Solved TMA
These two solutions are lifted straight from the paid set so you can judge the depth for yourself. The first is a pure concept answer inside the 40 to 60 word limit, the second is a numerical with the full working an evaluator wants to see. No skipped steps, correct units, and a clear final statement each time.
Q1 (a) · Can one modulus of elasticity explain every material behaviour under stress?
Lesson 8 · Elastic Properties of Solids · 40 to 60 words
No, a single modulus of elasticity cannot explain all behaviors. Each strain has its own modulus. Linear strain → Young's modulus, describing resistance to length change. Volumetric strain → Bulk modulus, measuring resistance to volume change. Shearing strain → Modulus of rigidity, explaining resistance to shape change. Hence, different moduli are required for different stresses.
Q2 (b) · Rate and direction of heat flow through the insulated iron rod
Lesson 12 · Heat Transfer and Solar Energy · 40 to 60 words
Use conduction: Q̇ = KAΔT / L.
A = πr² = π(0.02)² = 1.256 × 10⁻³ m² L = 0.40 m, ΔT = 100 K, K = 79 W m⁻¹ K⁻¹ Q̇ = (79 × 1.256 × 10⁻³ × 100) / 0.40 ≈ 2.48 × 10¹ WRate ≈ 24.8 W. Heat flows from the boiling-water end (100 °C) to the ice end (0 °C).
The remaining answers, including the helium specific-heat derivation, the two-block reduced-mass oscillation, the lens numerical with all four parts and the full SpaDeX project, follow the same standard. You can request the complete solved file on WhatsApp and check it before your submission date.
Want the full solved set? Message us for the complete NIOS Class 12 Physics 312 Solved TMA for the October 2026 session, delivered as a ready-to-submit file.
Chapters and Lessons in the NIOS Class 12 Physics TMA
The tutor-marked component pulls from twelve lessons out of the thirty in the Physics 312 book. The table below lists exactly those twelve, with the specific ideas each one contributes to the assignment, so you can see which chapter a given question is really testing.
| Lesson | Chapter | Key ideas it tests in the assignment |
|---|---|---|
| L-1 | Units, Dimensions and Vectors | Dimensional checks, vector resolution and significant figures used across the numerical answers |
| L-2 | Motion in a Straight Line | Displacement, uniform velocity and the constant relative-speed step in the docking project |
| L-4 | Motion in a Plane | Projectile components, time of flight, maximum height, range and the complementary-angle idea |
| L-5 | Gravitation | Variation of g with altitude, orbital period and gravitational potential energy of a satellite |
| L-7 | Motion of a Rigid Body | Angular momentum of an orbiting body expressed in both SI and CGS units |
| L-8 | Elastic Properties of Solids | Hooke's law, Young's, bulk and rigidity moduli, stress-strain and the bulk-modulus table |
| L-10 | Kinetic Theory of Gases | Degrees of freedom, equipartition of energy and the Cᵧ to Cᵛ ratio for a monatomic gas |
| L-12 | Heat Transfer and Solar Energy | Steady-state conduction, thermal conductivity and computing heat current along a rod |
| L-13 | Simple Harmonic Motion | Angular frequency, reduced mass, time period and the simple-pendulum home experiment |
| L-20 | Reflection and Refraction of Light | Lens formula, lens-maker equation, focal length, image distance and magnification sign |
| L-23 | Optical Instruments | Reflecting versus refracting telescopes, light-gathering power and aberration comparison |
| L-30 | Communication System | Amplitude modulation, side bands, carrier frequency and optical-fibre bandwidth advantage |
If you are still choosing subjects or planning your year, it helps to look at how the whole course is bifurcated before committing time, which is something a quick read of the NIOS Class 12 Syllabus makes clear for students mapping out their senior secondary Physics course.
How We Solve the NIOS Physics Class 12 Solved TMA
Every question starts with the prescribed lesson, not a generic search result. Our counsellor reads the exact section the assignment points to, then drafts an answer that stays inside the stated word count and shows the working an examiner rewards. For a numerical, that means writing the formula first, substituting values with units, and finishing with a plain-language result and its direction or sign.
Concept answers get the same care. When a question asks whether one modulus can describe every kind of strain, we answer the actual question rather than dumping the whole chapter, because the tutor-marked scheme rewards a direct, correct response over padding. Short answers that are precise consistently score better than long answers that wander.
We also keep units and significant figures consistent throughout, since Physics evaluators dock marks for a right number carrying the wrong unit. This discipline is the same one we apply across our NIOS Solved TMA library for other subjects, so the house style stays uniform whether you take Physics, Chemistry or Mathematics.
Why Students Trust Our NIOS Class 12 Physics 312 Solved TMA
Trust in a solved assignment comes down to whether the answers actually match the book and the marking scheme, and whether you can verify that before you pay. That is why we publish the full question list and two complete answers on this page rather than hiding everything behind a contact form.
- Answers are prepared from the current Physics 312 textbook and checked against the October 2026 paper, not carried over from an old session.
- Word counts are respected, so a 40 to 60 word question gets a tight answer and a project gets the detail it needs.
- Numericals show every step with units, which is where most self-written assignments lose marks.
- Support runs on WhatsApp, so a doubt about a specific step gets answered by a person, not a bot.
Students who used our earlier files often return for the next session, and many rely on our NIOS Class 12 Solved TMA across their full subject list before completing Class 12 Science. That continuity is why we keep formatting and quality steady from one paper to the next.
How to Get Your NIOS Class 12 Physics Solved TMA
Ordering is deliberately simple because most students reach this page close to a submission deadline. Send a WhatsApp message with your subject code, 312, and the session, October 2026, and we confirm availability, format and the current price straight away. There is no account to create and no long form to fill.
Three quick steps
- Message us on WhatsApp with "Physics 312 Solved TMA, October 2026 session".
- Confirm your format as typed PDF or handwritten scan, and confirm the price shared in chat.
- Receive your file and check it against the two sample answers above before you submit.
Pricing and the current session offer are shared directly in chat because they change between sessions, so we avoid printing a figure here that could go stale. Ask on WhatsApp and you will get the live rate for the Physics 312 set along with any bundle that includes the practical file.
Formats and Delivery of the Physics 312 Solved TMA
You can take the Physics 312 solved set as a typed PDF for clean printing or as a handwritten scan if your study centre prefers submissions in your own or a neutral hand. Both follow the same NIOS answer structure with aim, working and result laid out the way evaluators expect.
Delivery is over WhatsApp once your format and session are confirmed, usually the same day. Diagrams, such as the reflecting-telescope ray diagram and the projectile trajectory, are included where the question asks for them, since a missing diagram is an easy place to drop marks in a Physics answer.
Ready to order? Chat with our NIOS counsellor for the Physics 312 solved set, handwritten or typed, for the October 2026 session.
FAQs on the NIOS Physics 312 Solved TMA
Is the NIOS Class 12 Physics 312 Solved TMA updated for the 2026 session?
Yes, this solved set is prepared for the October 2026 assignment and matches the questions printed in the current paper. We rework the answers each session rather than reusing an older file, because NIOS can change a question, a data value or a project theme from one cycle to the next. You can confirm the exact session in chat before you order.
How many questions does the NIOS Physics 312 TMA contain?
The Physics 312 assignment has six main questions. Questions one to five each offer a choice between two parts, and question six is a project with several sub-parts. Most questions let you answer any one option, so the solved set gives the option that is fastest to defend while still showing complete working. The full list appears in the question section above.
Are the Physics 312 Solved TMA answers handwritten or typed?
Both formats are available for the Physics 312 solved set. A typed PDF suits clean printing and quick reading, while a handwritten scan suits study centres that prefer a written submission. You choose your format in the WhatsApp chat, and diagrams such as ray diagrams and trajectory sketches are included in either format where the question needs them.
Will the NIOS Physics Class 12 Solved TMA help me pass the internal assessment?
The tutor-marked assignment carries 40 percent of the Physics 312 internal weightage, so accurate answers make a real difference to your result. Our solved set is written to the marking scheme with correct units, tidy working and answers kept inside the word limits. It supports your own preparation and gives you a reliable reference for how each answer should be structured.
Which chapters does the NIOS Class 12 Physics TMA cover?
The Physics 312 tutor-marked assignment draws from twelve lessons, including elasticity, kinetic theory, heat transfer, simple harmonic motion, lenses, optical instruments and communication systems, plus mechanics topics used in the project. The chapters section on this page lists all twelve with the specific idea each one tests, so you can match a question to its source lesson quickly.
How do I receive the NIOS Physics 312 Solved TMA after ordering?
You receive the Physics 312 solved file directly on WhatsApp once your format and session are confirmed, usually on the same day. Send a message with subject code 312 and the October 2026 session, choose typed or handwritten, and the file is shared in chat. You can then check it against the two sample answers on this page before submitting.
Disclaimer: Unnati Educations is an independent academic support provider and is not affiliated with, endorsed by, or officially connected to the National Institute of Open Schooling (NIOS). All subject codes, question papers and course names belong to NIOS and are referenced only for identification and educational support. Students remain responsible for their own submissions.
Sources: Official NIOS Senior Secondary Physics (312) syllabus and October 2026 tutor-marked assignment, nios.ac.in. Written by Prateek Talwar and reviewed by Jyoti Sharma, Senior NIOS Counsellor.
