Physics is all science‼️ YouTube channel➡️" Physicswallah-Alakh pandey " Facebook page" Physicswallah" For Notes, Assignments visit our website NCERT CBSE Class 11 Physics Notes Chapter Wise CBSE Quick Revision Notes and Key Points for Class 11 Physics Notes Pdf free download was designed by expert teachers from the latest edition of NCERT books to get good marks in board exams. NCERT Physics Class 11 Notes contains all chapters are part of Revision Notes Of Physics Class 11. Here we have given CBSE Physics Notes Class 11. We recommend you to study NCERT Solutions for Class 11 Physics. CBSE Class 11 Physics Notes All Chapters Chapter 1 Physical World Class 11 Notes Chapter 2 Units and Measurement Class 11 Notes Chapter 3 Motion in a Straight Line Class 11 Notes Chapter 4 Motion in a Plane Class 11 Notes Chapter 5 Law of Motion Class 11 Notes Chapter 6 Work, Energy and Power Class 11 Notes Chapter 7 Systems of Particles and Rotational Motion Class 11 Notes Chapter 8 Gravitation Class 11 Notes Chapter 9 Mechanical Properties of Solids Class 11 Notes Chapter 10 Mechanical Properties of Fluids Class 11 Notes Chapter 11 Thermal Properties of Matter Class 11 Notes Chapter 12 Thermodynamics Class 11 Notes Chapter 13 Kinetic Theory Class 11 Notes Chapter 14 Oscillations Class 11 Notes Chapter 15 Waves Class 11 Notes
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Class 11 physics notes Class 11 secret notes for 2021-2022
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Classical Mechanics: It explains the motion of particles which travel with velocities much less than that of light.
Theory of Relativity: It explains the in-variance in nature and also the motion of particles which travel with velocities close to that of light.
Thermodynamics: It is the theory of heat, temperature and conversion of heat into work and vice-versa. It also explains the behaviours of systems containing very large number of particles.
Electromagnetism: It is theory of electricity, magnetism and the electromagnetic radiation including optics.
Quantum Mechanics: It explains the behaviours of atomic and subatomic systems of particles.
According to Albert Einstein, Science is not just a collection of laws, a catalogue of unrelated facts. It is a creation of human mind with its freely invented ideas and concepts. About modern physics, he said, the reality created by modern physics is indeed, far removed from the reality of the early days.
Simplicity of Physics – Physics is a basic Science. Why?
The animate and ananimate – all objects are made up of matter and energy. Therefore, any type of study of an object is basically the study of some manifestation of matter and energy. The matter and energy is the subject of study of physics, hence the laws of physics are at work at the root of the all sciences. Therefore, it need not be surprising if some direct modification of the laws of physics appear to be underlying the human behaviour also. Due to these reasons physics has intimate relationship with all the sciences
the board exams are just around the corner, I am sure everyone, teachers and parents included, are equally stressed. Students are busy with their last-minute revisions and are trying to get the most out of their study hours these days. Many of them are have their eyes and ears wide open for some last minute tips. Well, look no further.These are some great insights into each chapter for your Physics class 11. These key revision points and quick tips will help you prepare intelligently for the physics class 11. Even if you have left out certain chapters for last minute preparations or revisions, these tips will help you get through them better.
. There is no overall choice. However, there is an internal choice in one question of 2 marks weightage, one question of 3 marks weightage and all the three questions of 5 marks weightage.
5. Use of calculators is not permitted.
Some sample questions from CBSE Class 11 Physics Solved Sample Paper 2019 are given below:
Question:
State the number of significant figures 0.000040027 m2.
Solution:
The number of significant figures in 0.000040027 m2 is 5.
If the number is less than one, then the zeroes on the right of the decimal point (but left to the first non-zero) are insignificant. Hence, all four zeroes appearing before 4 are not significant figure. All zero between two non-zero digit are always significant. Hence, the remaining five digits are significant figures.
Question:
What are vector quantities? Give some examples.
Solution:
A vector quantity is specified by its magnitude as well as the direction associated with it. Examples are acceleration, velocity, displacement, and angular velocity.
Question:
Does short-sightedness (myopia) or long-sightedness (hypermetropia) imply necessarily that the eye has partially lost its ability of accommodation? If not, what might cause these defects of vision?
Solution:
No, a myopic or hypermetropic person may have normal ability of accommodation of the eye lens. The partial loss of ability of accommodation of eye lens is called presbyopia. It can be corrected in the way hypermetropia is dealt with.
(i) The magnitude of the force of limiting friction (F) between any two bodies in contact is directly proportional to the normal reaction (R) between them i.e. F R.
(ii) The direction of the force of limiting friction is always opposite to the direction in which one body is at the verge of moving over the other.
(iii) The force of limiting friction is independent of the apparent area of contact, as long as the normal reaction between the two bodies in contact remains same.
(iv) The force of limiting friction between any two bodies in contact depends on the nature of material of the surfaces in contact and their roughness or smoothness.
Question:
What are conservative and non-conservative forces? Give examples?
Solution:
Conservative forces: A force is said to be conservative if work done by or against the force in moving a body depends on the initial and final positions of the body and not on the nature of the path followed between the initial and final positions. This means, work done by or against a conservative force in moving body over any path between fixed initial and final position will be the same.
Non-conservative force: A force is said to be non-conservative, if work done by or against the force in moving a body from one position to another, depends on the path followed between these two positions.
Example: Frictional force
Download the complete sample paper in PDF format through the link given below:
Chapter 1 – Physical World
Tips:
The chapter is an interesting outlook about all that is happening in the field of science, especially physics. It is good to go through the chapter once for self-awareness. Else at the time of exam of physics class 11, there is not much to be asked from the topic.
Chapter 2 – Units and Measurement
Important Topics:
1. SI Units
2. Absolute Errors
3. Significant Figures
4. Dimensional Analysis
Tips:
a) The chapter includes units of physical quantities and methods of evaluating them. The next portion of the chapter is about the evaluation of errors while measuring other quantities. Both the topics are important for short answers and numerical.
b) Measurement of any data can give us long figures. Significant digits method is a good way to evaluate a standard figure. The topic is also important from a numerical point of view.
c) Dimensions of different quantities are frequently asked for short answers in exams. Numerical from the same are also asked as short numerical.
d) None of the above topics requires intensive practice and preparation for the exam of physics class 11.
Chapter 3 – Motion in a Straight Line
Important Topics:
1. Average Velocity and Average Speed
2. Instantaneous Velocity and Speed
3. Relative Velocity
4. Kinematic Equations for Uniformly Accelerated Motion
Tips:
a) Graphical representation and interpretation of accelerated motion are very important as questions are frequently asked graphically.
b) Numerical from all the important topics mentioned are very important. They are often asked in different forms, so be prepared with each topic and practice few extra numerical for the exam of physics class 11.
Chapter 4 – Motion In a Plane
Important Topics:
1. Vector Operations
2. Resolutions of Vectors
3. Motion of Object in Plane
4. Projectile Motion
Tips:
a) Direct questions are not frequently asked from the vector but vector addition, multiplication, etc. are used in almost every third problem in physics. So overall good grip on vectors is very important to excel while solving numerical in other topics of physics.
b) Resolving vector into components is an important tool used while solving numerically. Do not skip the topic at all.
c) Projectile motion is a very important topic, both derivation and numerical should be practiced.
d) Numerical from the motion of objects in a plane is very important.
e) Use differentiation and integration as a basic tool wherever required.
f) Overall, the chapter is very important and is equally contributing to almost all the remaining chapters of physics class 11.
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Chapter 5 – Laws of Motion
Important Topics:
1. Newton’s First Law of Motion
2. Newton’s Second law of Motion
3. Newton’s Third Law of Motion
4. Conservation of Momentum
5. Circular Motion
6. Problem Solving in Mechanics
Tips:
a) It is the most important chapter in mechanics. All the three laws of Newton should be well understood and you should be able to relate these laws to general day to day life activities.
b) Numerical is frequently asked based on the conservation of momentum. These problems do include the conceptual steps taken from three laws of Newton’s while solving the problem.
c) Quality questions are asked from mechanics involving friction and resolving forces into various components and equalizing them.
d) A brief knowledge
this article we will provide you ten important Physics questions, which will help you in your class 11 Physics exams and other entrance exams. Class 11 Important Physics Questions
Class 11 Important Physics Questions is very important resource for students preparing for Class XI board Examination. Question from very important topics are covered here for NCERT Class 11. You will also get idea about the type of questions, you can expect in your Class 11th examination.
Here you can get Class 11 Important Physics Questions based on NCERT Text book for Class XII. Here we have covered Important Questions on all topics for Class 11 Physics subject.
Class 11 Important Physics Questions
Write the condition for conservation of mechanical energy of a system.
2. . Resultant of two vectors of equal amplitude is equal in magnitude with one of the vectors, calculate the angle between them
Or
A woman throws an object of mass 500 g with a speed of 25 m/s. (i) What is the impulse imparted to the object? (ii) If the object hits a wall and rebounds with half the original speed, what is the change in momentum of the object?
3. Two particles each of mass m go round a circle of radius a under the action of their mutual gravitational attraction. Find the speed of each particle. Also analyse in terms of kinetic energy and gravitational potential energy.
4. Find the angle made by a cyclist with the vertical while taking a circular turn of radius a. Also state the forces which are providing centripetal acceleration and maintain vertical equilibrium.
5. What is the moment of inertia of a solid sphere of radius R about one of its diameter. If moment of inertia about the parallel tangent is . Also, state the theorem of perpendicular axes.
6. Find the expression for potential energy of a strained body.
7. Ten one-rupee coins are put on top of each other on a table. Each coin has mass m. Give the magnitude and direction of (i) the force on the 7th coin (counted from the bottom) due to all the coins on its top, (ii) the force on the 7th coin by the eighth coin, (iii) the reaction of the 6th coin on the 7th coin
8. John found his mother suffering from viral fever and took her to the doctor for treatment. While examining her, the doctor used a thermometer to know the temperature of the body. He kept the thermometer in the mouth of the patient and recorded the reading as 102°F. Doctor gave the necessary medicines. After coming home, John asked his mother, why thermometer is used to know the temperature of body? Why mercury is used in a thermometer when there are so many liquids? Then, his mother explained him in detail.
(i) Comment upon the values displayed by John’s mother. (ii) A newly designed thermometer has its lower fixed point marked at 5° and 95° , respectively. Compute the temperature on this scale corresponding to 50° C.
9. Two identical springs each of force constant k are connected in (i) series and (ii) parallel, so that they support a mass m. Find the ratio of the time periods of the mass in the two systems.
Or
Draw the first three harmonics in an open organ pipe. Two piano strings A and B are playing slightly out of tune and produce beats of frequency 5 Hz. The tension in string B is slightly increased and the beat frequency is found to decrease to 3 Hz. What is the original frequency of B if the frequency of A is 500 Hz?
10. What is a projectile? Derive the expressions for the time of flight and maximum height for the projectile thrown upwards at an angle0with the horizontal direction.
Or
The ceiling of a long hall is 25 m high. What is the maximum horizontal distance that a ball thrown with a speed of 40 m/s can go without hitting the ceiling of the hall?
Class 11 secret notes for 2020-2021
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