.webp)
Last updated 12/june/2026 · Written and reviewed by Prateek Talwar, Unnati Education NIOS · Method guide for Class 10 and Class 12 practical subjects · Verify current rules on nios.ac.in.
Learn How to Make a NIOS Practical File , prepare a handwritten file with a cover page carrying your name, enrolment number, subject, subject code and session. Write each experiment as aim, apparatus, procedure, a labelled diagram, observations, calculation and result, then conclusion. Index it, bind it neatly, get it signed and submit it at your study centre.
On this page: What Is a NIOS Practical File · Eight Steps · Class 10 Format · Class 12 Format · Marks and Weightage · Common Mistakes · Faster With a Solved Reference · FAQ
What Is a NIOS Practical File
A NIOS practical file is a handwritten record of the experiments, activities or fieldwork a student completes for a practical subject, written up in a fixed format and submitted for assessment at the study centre. It is your proof that the lab or project work was actually done by you.
The National Institute of Open Schooling (NIOS) treats this file as a graded part of the practical subject, not an optional extra. If you want a ready reference to copy the layout from, a worked nios practical file can show you the exact structure before you begin.
Why NIOS makes the file mandatory for practical subjects
Practical marks count towards your final result in the subject, so the file is part of how you pass. It records each piece of lab or field work in a form the examiner can check, and it gives the examiner a base for the viva voce. A subject reported without its practical component can hold up your result.
Why it must be handwritten, not printed or typed
For most practical subjects the file is expected to be handwritten in your own hand. Handwriting is how NIOS sees that the work is genuinely yours. A neatly written file also reads as honest effort, and that impression helps you in the viva.
How to Make a NIOS Practical File in Eight Steps
Here is the full method, in the order an examiner expects to see it. Follow the same write-up pattern for every experiment and your file will look consistent from the first page to the last.
-
Step 1 — Prepare the cover page
On the front page write your name, subject, subject code, enrolment number, session and study-centre details. Keep it clean and centred. This is the first thing the examiner sees, so a missing enrolment number or wrong subject code is an easy mark to lose for no reason.
-
Step 2 — Write the aim and the apparatus or materials
Open each experiment with a one-line aim that states exactly what you set out to do. Below it, list the apparatus or materials used. Keep the aim specific, not a paragraph, and match the apparatus to what the procedure actually mentions.
-
Step 3 — Record the procedure step by step
Write the procedure as short numbered steps in the order you performed them. Use the past tense and stay factual. In practice, examiners skim for whether the steps make sense and lead to the observation, so do not pad them with theory.
-
Step 4 — Draw and label diagrams correctly
Draw diagrams in pencil with a ruler, and label every part clearly. A labelled, ruled diagram looks like real lab work whereas a freehand sketch with no labels looks copied. Give each diagram a short title so it ties back to the experiment.
-
Step 5 — Note observations and readings in tables
Put readings and observations in a simple table rather than loose lines. Tables are easier to mark and harder to fudge. Record what you actually saw or measured, and keep the columns labelled with the quantity and its unit.
-
Step 6 — Show calculations and the result, with units
Write the formula, substitute your readings, then show the result with the correct unit. Do not jump straight to an answer. A result without units, or a calculation that skips the working, is a common reason students drop marks on an otherwise good experiment.
-
Step 7 — Write the conclusion
Close each experiment with a short conclusion in your own words that states what the result shows. Two or three honest lines are enough. Avoid copying a textbook line, because the viva examiner may ask you to explain it.
-
Step 8 — Index, bind and get it signed
Add an index page listing every experiment with its page number, bind the file neatly and get it signed by your subject teacher or study centre before the practical exam. An unsigned or unbound file is where easy marks quietly disappear.
NIOS Class 10 Practical File — Subjects and Format
At the Secondary (Class 10) level, only certain subjects carry a practical component, so first check whether your subject needs a file at all. The format follows the same eight-step write-up, kept simple and clearly presented.
Class 10 subjects that require a practical file
Subjects with practical work at the Secondary level typically include Science and Technology, Home Science, Psychology, Data Entry Operations and Painting. If your subject is on the list, a ready-format nios class 10 practical file can show you what a complete write-up looks like before you start your own.
Sample experiment write-up for Class 10
A safe, generic skeleton for any Class 10 experiment runs as follows. Aim — one line on what is being tested. Apparatus or materials — a short list. Procedure — three to five numbered steps. Observation — a small table of what was seen or measured. Result — the finding with its unit. Conclusion — two lines in your own words. Repeat this shape for every experiment in the file.
NIOS Class 12 Practical File — Subjects and Format
At the Senior Secondary (Class 12) level more subjects carry practicals, and the write-ups are expected to be fuller. The structure is identical, but the depth and precision step up.
Class 12 subjects with practicals
Senior Secondary subjects with practical work typically include Physics, Chemistry, Biology, Geography, Home Science, Psychology, Painting, Computer Science and Data Entry Operations. A worked nios class 12 practical file is useful here mainly to get the longer write-ups and calculation layout right.
How Class 12 write-ups differ from Class 10
Class 12 experiments usually need more detailed procedures, more careful calculations and more precise readings. Diagrams carry more labelled parts, and the conclusion is expected to engage with the result rather than just restate it. The same neatness rules apply, only with greater accuracy expected.
NIOS Practical File Marks and Weightage
Practical marks are added to your theory marks for the subject, so a weak file or a shaky viva pulls down a total you may otherwise have earned on theory. Most NIOS students underestimate how much a tidy, complete file helps here.
File marks versus viva marks
Per the NIOS practical guidelines, the practical maximum for most subjects is 15 marks at Secondary and 20 marks at Senior Secondary, with Painting at 70, Data Entry or Word Processing at 60 and Computer Science at 40. The viva is usually assessed within that total rather than added on top, and the exact file-versus-viva split varies by subject, so confirm it for your own subject before you assume a figure.
| Component | Typical maximum marks | How it is assessed |
|---|---|---|
| Practical for most subjects at Class 10 | 15 | File plus performance at study centre |
| Practical for most subjects at Class 12 | 20 | File plus performance plus viva at study centre |
| Painting at both levels | 70 | Artwork as prescribed |
| Data Entry or Word Processing | 60 | Practical at study centre |
| Computer Science at Class 12 | 40 | Practical at study centre |
How practical marks affect your final result
Because these marks combine with your written paper, they can lift a borderline result or sink a strong one. A complete file and a confident viva are among the most controllable marks on your whole certificate, so they are worth the care.
Common Mistakes That Cost Marks
Here is where students lose easy marks, and almost all of it is avoidable with a slow final check before submission.
Formatting and presentation errors
Missing cover-page details, no index page, untidy or unlabelled diagrams, readings with no units, and an unsigned file are the usual culprits. None of these are about knowledge. They are about care, and the examiner notices.
Skipping viva preparation
The viva voce is built from your own file, so a student who has not reread their experiments struggles to explain them. Revise your aims, procedures and conclusions the night before, and be ready to explain any one experiment in your own words.
Ignoring the official lab manual format
Each subject has a prescribed write-up order. Inventing your own layout or borrowing a friend's from a different subject reads as careless. Follow the NIOS-prescribed format for your subject and keep it consistent across the file.
How to Make a NIOS Practical File Faster With a Solved Reference
If you are short on time or have never made a file before, a solved reference file saves you the slowest part, which is working out the correct structure and layout from scratch. Used honestly, it is a format guide. You read how each experiment is set out, then write your own file in your own handwriting. The submitted file stays genuinely your work and you have only borrowed the shape. Unnati Education NIOS prepares these reference files for both Class 10 and Class 12. For a NIOS solved reference file, message us on WhatsApp at 9654279279 or 9899436384.
Frequently Asked Questions
Can I type my NIOS practical file or must it be handwritten?
For most practical subjects the file should be handwritten in your own hand, as that is the NIOS norm and shows the work is yours [VERIFY exceptions]. Painting is artwork, and Data Entry or Computer Science may involve printouts. When unsure, confirm the accepted format for your subject with your study centre.
How many pages should a NIOS practical file be?
There is no universal fixed page count. The file should be long enough to cover every required experiment or activity neatly, with each write-up complete [VERIFY any subject-specific norm]. Quality and completeness matter far more than thickness, so do not pad the file to reach an imagined page target.
What happens if I don't submit the practical file?
Not submitting the practical file means losing the practical marks for that subject, which can affect or hold up your result since practical marks are part of the subject total. The exact consequence depends on the subject and rules, so confirm your position with your study centre well before the exam.
Where do I submit the NIOS practical file?
You submit the file at your allotted study centre or Accredited Institution, where the practical examination and viva are also conducted. Carry the signed, bound file on your practical exam date. Check the practical date sheet on nios.ac.in and confirm timing with your centre.
Is the viva based on my file?
Yes. Examiners usually ask viva questions from the experiments in your own file, so reread your aims, procedures, observations and conclusions before you go in. Being able to explain any one experiment clearly, in your own words, is the simplest way to secure these marks.
A Quick Note
Unnati Education NIOS is an independent study-support provider and is not affiliated with the National Institute of Open Schooling (NIOS). All rules on marks, subjects and submission should be confirmed on nios.ac.in and with your study centre. Reference files are study aids to be copied in the student's own handwriting, never submitted as someone else's work. For a NIOS solved reference file for Class 10 or Class 12, contact us on WhatsApp at 9654279279 or 9899436384.
