1st Year Physics Chapter 1 Notes (New Book 2025-26): Measurements – All Punjab Boards
Measurements opens the new Class 11 Physics textbook, and the working habits you build here stay with you for the rest of the year. Writing a unit after a number, thinking about how precise a reading is, and setting out a calculation line by line are all practised in this chapter. These notes are prepared for Chapter 1 of the PECTAA book that Punjab introduced in the 2025-26 session.
The file brings together five parts: MCQs, short questions with answers, long questions with answers, solved numericals, and the solved exercise from the textbook. It costs nothing, and you can download it from this page without being sent to another website.
Do not rely on old notes from a senior. The physics book taught in Punjab before 2025-26 arranged its chapters in a different way. Even where a chapter name looks familiar, the questions and exercise in the new book may not be the same, so older material can leave gaps.
Students of the Lahore, Rawalpindi, Gujranwala, Faisalabad, Sargodha, Multan, Sahiwal, Bahawalpur and Dera Ghazi Khan boards can use the same file. The sections below describe what each part offers, how the parts relate to the paper, and a study plan suited to a chapter that rewards careful working.
About Chapter 1 in brief
Measurements, as the name indicates, is about how physical quantities are measured and expressed. In general terms, it deals with the units used to state a result and with how far a measured value can be trusted. Rather than teaching the chapter, this page sets out what the notes contain and how to make good use of them.
What’s inside the 1st year physics chapter 1 notes
The notes are divided into five parts. Each has its own job, and knowing that job before you open the file helps you decide when to use it.
MCQs
Multiple-choice questions give you a quick reading of where you stand on Chapter 1. This chapter has several terms that sound close to one another, so the options in an MCQ can look alike, and picking the right one depends on knowing the exact meaning.
Work through a set in one sitting with the book closed. Put a small mark beside any question where you hesitated, even if your choice turned out to be right, and look up that idea in the textbook afterwards. A lucky guess still points to something you have not yet learned.
Short questions with answers
This part pairs short questions with written answers. On a measurement chapter, short questions often ask you to state a definition, give a reason, or explain how two related terms differ, all in two or three lines.
Use the answers as a reference, then cover them and write your own version in two or three lines. If yours runs much longer, look for sentences that only repeat the question or add background nobody asked for, and cut them.
Long questions with answers
The long questions are answered at greater length. Questions of this kind usually ask you to explain an idea in stages, describe a method, or build an argument from a starting point to a conclusion.
Read one answer slowly and jot down its main stages on scrap paper. The next day, write the answer again using only that list of stages. This turns a page of reading into something you can reproduce when the clock is running.
Numericals (solved)
This section offers numerical problems on Chapter 1 together with their solutions. In a measurement chapter, numericals test whether you can handle quantities and units correctly, not only whether you can press the right keys on a calculator.
Attempt each problem before you look at its solution. As a habit, begin your own working by writing down the given data with units, then the quantity you need to find, then the formula you plan to use. Carry the units through each line and ask whether the final unit suits the quantity asked for. If your answer disagrees with the solution, trace back to the first line where the two part ways.
Solved exercise
Here the exercise at the end of Chapter 1 in the textbook is worked through. Because these questions come from the textbook itself, this part is a sensible place to rehearse.
Do the exercise yourself first, in a rough notebook. Only then open the solution and compare. The short notes you write about your own mistakes at this stage often turn out to be the most useful revision sheet you have.
Why these notes are useful
The file is a single place to return to whenever Chapter 1 comes up in class, in a test or during revision.
- Matched to the 2025-26 Chapter 1. The material follows Chapter 1 of the 2025-26 PECTAA textbook rather than the older syllabus.
- Five kinds of practice together. Objective questions, written answers, numericals and the textbook exercise sit in one file.
- An early start on numerical habits. Practising measurement problems now gives you a routine you can carry into later chapters.
- No charge. The file can be downloaded free from this page.
Notes support your study; they do not stand in for it. They help most after you have read the textbook and followed your teacher’s explanation in class.
Which exam questions these notes help with
The table links each part of the file to a kind of question commonly set in the intermediate physics paper. Your board decides the pattern, the number of questions and the marks, so check its official pairing scheme for the current session before planning your revision around it.
| Part of the notes | Kind of paper question it can help with |
| MCQs | The multiple-choice section of the objective part |
| Short questions with answers | Short written answers in the subjective part |
| Long questions with answers | Longer descriptive answers |
| Numericals (solved) | Numerical problems in the subjective part |
| Solved exercise | Questions built on the textbook exercise |
Lists of “sure” questions for Chapter 1 appear on many websites before each exam season. They are unofficial and rarely agree with one another. Working through the chapter and its exercise, and then reading the pairing scheme from your own board, is a steadier plan.
How to study with these notes
Measurement skills grow through repetition, so short and regular sessions suit this chapter better than one long sitting. A seven-step plan:
- Read the chapter once without the notes. Underline terms you cannot yet explain in your own words.
- Make a units page. On one sheet, list each quantity you meet along with its symbol and unit.
- Do the end-of-chapter questions. Work in rough, numericals included, before checking anything.
- Mark it against the solved exercise. Correct your work and write one line on why each mistake happened.
- Practise the numericals. For each problem, set down the given data, the formula and the units before you put in values, and check the unit of your result.
- Work on the written answers. Read a few, then rewrite them from memory and compare.
- Time yourself on the MCQs. Use them as a timed self-test, then revisit any weak idea in the textbook.
Keep your units page within reach while you study later chapters.
Who should use these notes
FSc pre-engineering and pre-medical students in Class 11 are the main readers of these notes. Other students who take physics under a Punjab board with the new textbook can use them too, and so can private candidates preparing on their own.
Unsure which edition your session uses? Ask your college or check with your board before you begin.
Download the notes
The 1st year physics chapter 1 notes are free to download right here on this page; no redirection to another site is required.
Save the file in the same folder as your rough exercise work, so your attempts and the solutions are easy to compare during revision.
Frequently asked questions
Are these notes made for the 2025-26 physics book?
Yes. They follow Chapter 1, Measurements, of the PECTAA Class 11 Physics textbook introduced in Punjab from the 2025-26 session.
The old book also started with measurement. Can I use old notes instead?
It is safer not to rely on them. The earlier book was organised differently, so its questions and exercise may not match the new edition.
Which parts come in the Chapter 1 notes?
There are five: MCQs, short questions with answers, long questions with answers, numericals with solutions, and the textbook exercise worked out.
How can I avoid unit mistakes in numericals?
Write the unit beside each value from the first line of your working, and check at the end that the unit of your answer fits the quantity you were asked to find.
Can students from any Punjab board download this file?
Yes. The notes are meant for students of all nine Punjab boards who study from the new textbook. For the paper pattern, your board’s pairing scheme is the source to follow.