Books written by Lakhmir Singh and Manjit Kaur are the best reference materials for students to clear their doubts instantly. Lakhmir Singh Solutions for Class 9 Physics is one of them. The topics covered in Lakhmir Singh Solutions are based on the latest syllabus of the CBSE Board. The reason why students prefer Lakhmir Singh solutions is that the concepts are explained with the help of examples, which makes them understand better. Besides, the solutions give them a chance to apply the formulas and thus practise well for the annual exam.
The textbook consists of different sections, such as the explanation of the chapters with solved examples and practice questions. In addition, multiple-choice questions are given at the end of each chapter.
Different types of questions that are provided in the textbook for students to practise are listed below:
- Very short answer type questions
- Short answer type questions
- Long answer type questions
- Multiple-choice questions
- Questions based on higher-order thinking skills
Following is the table with the list of chapter names that are covered in Lakhmir Singh Solutions for Class 9 Physics:
Lakhmir Singh Solutions Class 9 Physics |
| Chapter 1: Motion |
| Chapter 2: Force and Laws of Motion |
| Chapter 3: Gravitation |
| Chapter 4: Work and Energy |
| Chapter 5: Sound |
Chapter 1: Motion
Motion is defined as the movement of an object. There are different terms that are used to explain the motion of an object, and they are distance travelled, speed, acceleration, and laws of motion. There are three laws of motion, and these laws are explained with the help of diagrams and graphs. Also, the derivation of these laws is explained in the chapter.
Following is the table explaining the number of questions that are present in Chapter 1:
| Very short answer type questions | 36 |
| Short answer type questions | 29 |
| Long answer type questions | 16 |
| Multiple-choice questions | 25 |
| Higher-order thinking skills questions | 19 |
| Total questions | 125 |
Chapter 2: Force and Laws of Motion
Force is defined as either a push or a pull that is experienced by the body. Force is responsible for the change in velocity, direction, and shape of the body. Momentum, conservation of momentum, and laws of motion are the other concepts that are explained in Chapter 2. All the concepts are supported with relevant numericals, along with solved examples for better understanding.
Following is the table explaining the number of questions that are present in Chapter 2:
| Very short answer type questions | 33 |
| Short answer type questions | 37 |
| Long answer type questions | 10 |
| Multiple-choice questions | 20 |
| Higher-order thinking skills questions | 5 |
| Total questions | 105 |
Chapter 3: Gravitation
Why does the ball return back to the ground when it is thrown upwards, but the rocket flies to outer space? The answer is gravitation. Every object in the universe attracts every other object, and a certain amount of speed is required to make an object go to outer space. These are the concepts that are covered in Chapter 3. Also, learn how Newton’s third law of motion is related to gravitational force.
Following is the table explaining the number of questions that are present in Chapter 3:
| Very short answer type questions | 52 |
| Short answer type questions | 51 |
| Long answer type questions | 13 |
| Multiple-choice questions | 25 |
| Higher-order thinking skills questions | 18 |
| Total questions | 159 |
Chapter 4: Work and Energy
Work is said to be done when a force is applied to make an object move. To do this, energy is required. Also, work can be either positive, negative, or zero. There are different forms of energy, such as kinetic energy, potential energy, heat energy, light energy, chemical energy, sound energy, nuclear energy, and electrical energy. Apart from this, learn about the working principle of the simple pendulum in this chapter.
Following is the table explaining the number of questions that are present in Chapter 4:
| Very short answer type questions | 39 |
| Short answer type questions | 42 |
| Long answer type questions | 12 |
| Multiple-choice questions | 22 |
| Higher-order thinking skills questions | 15 |
| Total questions | 130 |
Chapter 5: Sound
Sound is a form of energy and is produced with the help of vibrations from objects. Sound always travels in the form of waves, and they are of two types: longitudinal waves and transverse waves. Wavelength, amplitude, and frequency are some of the characteristics of sound waves. Learn more about sound in Chapter 5.
Following is the table explaining the number of questions that are present in Chapter 5:
| Very short answer type questions | 77 |
| Short answer type questions | 43 |
| Long answer type questions | 15 |
| Multiple-choice questions | 28 |
| Higher-order thinking skills questions | 11 |
| Total questions | 174 |
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