Class 11 Physical world Introduction of physics: NCERT Book Solutions
Class 11 chapter Physical world Important key points for quick revision for board exams, ssc and upsc exams preparaion.
NCERT Solutions
All chapters of ncert books Physics Physical world Introduction of physics is solved by exercise and chapterwise for class 11 with questions answers also with chapter review sections which helps the students who preparing for UPSC and other competitive exams and entrance exams.
Class 11 chapter Physical world Important key points for quick revision for board exams, ssc and upsc exams preparaion. - Physical world - Introduction of physics: NCERT Book Solutions for class 11th. All solutions and extra or additional solved questions for Physical world : Introduction of physics Physics class 11th:English Medium NCERT Book Solutions. Class 11 chapter Physical world Important key points for quick revision for board exams, ssc and upsc exams preparaion.
Physical world : Introduction of physics Physics class 11th:English Medium NCERT Book Solutions
Class 11 chapter Physical world Important key points for quick revision for board exams, ssc and upsc exams preparaion. - Physical world - Introduction of physics: NCERT Book Solutions for class 11th. All solutions and extra or additional solved questions for Physical world : Introduction of physics Physics class 11th:English Medium NCERT Book Solutions.
Class 11 Physical world Introduction of physics: NCERT Book Solutions
NCERT Books Subjects for class 11th Hindi Medium
Physical world
Class 11 chapter Physical world Important key points for quick revision for board exams, ssc and upsc exams preparaion.
Introduction of physics
- What is science?
Science : Organised knowledge of nature is known as science.
"Science is a systematic attempt to understand natural phenomena in as much detail and depth as possible, and use the knowledge so gained to predict, modify and control phenomena. Science is exploring, experimenting and predicting from what we see around us."
Physics is study of nature and its phenomenoms.
Thrust area of study of physics:
(i) Unification: Measuring unit in special manner and unified.
Unification is to explain different phenominom in nature on basis of one or minimum law.
(ii) Reductionism: A related effort is to derive the properties of a bigger, more complex, system from the properties and interactions of its constituent simpler parts. This approach is called reductionism and is at the heart of physics.
Science is not based on assumptions while it is based on experiments.
- All theories/principles in science is not final it can be changed on scienctific study.
Scientific Method to study nature / Scienctific study.
(i) Obsorvation:
(ii) Controll experiment
(iii) Qualitative & quantitive reasoning: Quantitative measurement is central to the growth of science, especially physics, because the laws of nature happen to be expressible in precise mathematical equations. The second most important insight was that the basic laws of physics are universal — the same laws apply
in widely different contexts. Lastly, the strategy of approximation turned out to be very successful.
(iv) Mathematical Modelling (Making Formula/testing on formula) :
(v) Prediction : Pridiction will be true or false
(i)
(v) Verification or
There are two domains of interest:
(i) Macroscopic: The macroscopic domain includes phenomena at the laboratory, terrestrial and astronomical scales.
(ii) Microscopic: The microscopic domain includes atomic, molecular and nuclear phenomena.
Classical Physics deals mainly with macroscopic phenomena and includes subjects like Mechanics, Electrodynamics, Optics and Thermodynamics.
Electrodynamics deals with electric and magnetic phenomena
associated with charged and magnetic bodies.
Important facts for science.
- Modified Hypothethis or principle
- Microscopic observations of events.
- Making hypothesis or principle on the basis of observations.
- Testing and analysing these hypothesis or principles which really happens.
Discussion facts:
- Prediction on the study and its proving.
It covers a tremendous range of magnitude of physical quantities like length, mass, time, energy, etc. At one end, it studies phenomena at the very small scale of length (10-14 m or even less) involving electrons, protons, etc.; at the other end, it deals with astronomical
phenomena at the scale of galaxies or even the entire universe whose extent is of the order of 1026 m.
Class 11 chapter Physical world Important key points for quick revision for board exams, ssc and upsc exams preparaion.
See other sub-topics of this chapter:
2. Scope and excitement of physics
3. Physics technology and society
4. Fundamental forces in nature
Class 11 chapter Physical world Important key points for quick revision for board exams, ssc and upsc exams preparaion. - Physical world - Introduction of physics: NCERT Book Solutions for class 11th. All solutions and extra or additional solved questions for Physical world : Introduction of physics Physics class 11th:English Medium NCERT Book Solutions. Class 11 chapter Physical world Important key points for quick revision for board exams, ssc and upsc exams preparaion.
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Physics Chapter List
Physical world
Units and Measurement
Motion In A Straight Line
Motion In A Plane
Law of Motion
Work Energy and Power
Systems of Particles and Rotational Motion