1st Year Physics Chapter 9 Notes (New Book 2025-26): Electrostatics and Current Electricity – All Punjab Boards
Rub a plastic comb on dry hair and it will pick up scraps of paper; switch on a fan and charge flows steadily through its wires. Chapter 9 of the new Class 11 Physics textbook, Electrostatics and Current Electricity, brings these two pictures of electric charge together. The textbook was developed under PECTAA and is taught in Punjab from the 2025-26 session.
Electricity is a topic where definitions, diagrams and calculations meet. A student who knows the theory can still lose track in a circuit problem, and one who is quick with numbers may stumble when asked to explain a basic term. These notes let you practise each skill separately before you combine them.
On this page you can get the 1st year physics chapter 9 notes free, arranged in five parts: MCQs, short questions with answers, long questions with answers, solved numerical problems, and the end-of-chapter exercise with answers.
Because the new textbook reorganised the Class 11 course, chapter numbers from the earlier book no longer line up. Material labelled for an older syllabus is likely to differ from what you study now, so stick to notes made for the 2025-26 book.
All Punjab boards use this textbook, which means the file is equally suited to a student in Sargodha, Multan or Lahore. The rest of this page explains the five parts, relates them to paper question types, and suggests a way to study the chapter.
About Chapter 9 in brief
As its title indicates, the chapter is concerned with electric charge in two situations. Electrostatics deals with charges at rest and the forces and fields they produce, while current electricity is about charges in motion through conductors and circuits. These notes are meant to support your study of that material; this page describes them rather than explaining the physics.
What’s inside the 1st year physics chapter 9 notes
You will find five parts in the Chapter 9 file. Each one prepares you for a different style of question, so it helps to know their roles before you begin.
MCQs
This part is a set of multiple-choice questions on the chapter. Electricity has many quantities with similar-sounding names and units, and MCQs quickly reveal whether you can keep them apart.
Take the MCQs as a timed practice round. Afterwards, sort your errors into two groups: ideas you misunderstood and units you mixed up. Each group needs a different kind of revision.
Short questions with answers
This part gives short questions with answers. In this chapter, short questions commonly ask for the meaning of a term, the unit of a quantity, or a brief reason why something happens in a circuit or around a charge.
Read a few answers, then practise writing your own, making sure each one names the quantity involved and, where it fits, gives its SI unit.
Long questions with answers
Detailed answers to long questions make up this part. Extended questions on electrostatics and current electricity can ask you to explain a law, describe a relationship between quantities, or discuss how a circuit behaves.
As you read each answer, mark the main statement, the supporting explanation and any diagram. When you attempt a long question yourself, draw circuit diagrams with clear symbols and label each component you mention.
Numericals
This part contains solved numerical problems. Calculations in this area often use prefixes such as micro and kilo, and a missed prefix can shift an answer by a factor of a thousand or a million.
Solve each problem on paper before checking. Compare your working line by line with the solution, paying close attention to how values with prefixes were handled.
Solved exercise
This part solves the textbook’s end-of-chapter exercise. Because the exercise is written by the textbook authors, it gives a good sense of the kinds of questions the chapter is designed to prepare you for.
Attempt the questions before you read the solutions. Where your answer and the solution part ways, return to the relevant page of the book and reread it until the step makes sense.
Why these notes are useful
Chapter 9 combines theory and calculation, and keeping practice material for both in one file makes revision more manageable.
- Aligned with the 2025-26 book. The notes are prepared for the new PECTAA version of this chapter.
- Theory and calculation side by side. Short and long answers come in the same file as solved numericals.
- A way to check your own work. Solved problems and the exercise solutions let you see where your method differs.
- Free of charge. You pay nothing to download the file here.
Reading solutions is not the same as being able to produce them. Use the notes to check and guide your own attempts, and keep your textbook as the main reference.
Which exam questions these notes help with
The parts of the notes are paired below with types of questions that typically appear in the intermediate Physics paper. Question numbers, choices and marks are decided by your board, so confirm the current pattern through its official pairing scheme.
| Part of the notes | Related question type |
| MCQs | Objective section of the paper |
| Short questions with answers | Short-answer questions in the subjective section |
| Long questions with answers | Long-answer questions in the subjective section |
| Numericals | Numerical problems requiring full working |
| Solved exercise | Questions linked to the end-of-chapter exercise |
You may come across predictions about which electricity questions are “sure to come”. No such prediction is official. Preparing the chapter carefully and following your board’s scheme protects you better than relying on a guess.
How to study with these notes
This chapter has a lot of interconnected ideas, so work through it in stages:
- Separate the two topics. Study the material on charges at rest first, then move to charges in motion.
- Make a units table. List each quantity you meet with its symbol and SI unit, and keep the table in front of you while practising.
- Redraw the circuit diagrams. Copy each one from the book using standard symbols until you can draw it without looking.
- Attempt the textbook exercise, then check the solved exercise. Note where your reasoning went wrong.
- Practise the numericals with a fixed routine. Write the given data, convert any prefixed values into base units, state the formula, substitute, and give the answer with its unit. Make sure your result makes physical sense.
- Learn from the short and long answers. Write several from memory and compare with the notes.
- Finish by testing yourself on the MCQs. Use the results to decide what to revise one last time.
Working a few problems each day keeps the formulas and units fresh, which is especially helpful in a chapter with this many quantities.
Who should use these notes
These notes are aimed at Punjab students in FSc part 1, pre-engineering or pre-medical, who use the new Physics textbook. Other intermediate students taking Physics under a Punjab board can use them in the same way.
Private candidates preparing from the 2025-26 book are welcome to use them too. If you are not certain which book your board has set, ask your college or check with the board before starting.
Download the notes
The Chapter 9 file is available to download free on this page, so you do not need to visit any other website.
Keep these electrostatics and current electricity notes with your units table and rough work so that your revision material for the chapter stays together.
Frequently asked questions
Is Chapter 9 of the new book the same as the electricity chapter in older notes?
Not necessarily. These notes are for Electrostatics and Current Electricity, Chapter 9 of the PECTAA textbook introduced in 2025-26. Older material may follow a different syllabus and chapter order.
What parts does the Chapter 9 file include?
MCQs, short questions with answers, long questions with answers, solved numericals, and a solved version of the textbook exercise.
Will downloading the file cost anything?
No. Nothing is charged; it downloads free right here.
How do I stop making mistakes with micro and milli values?
Convert each prefixed value into its base unit as a separate step before you put it into a formula. A units table kept beside you makes this quicker.
Can I use these notes if I am in the Bahawalpur or Dera Ghazi Khan board?
Yes. This textbook is used across all Punjab boards. For the paper structure, refer to your own board’s pairing scheme.