Summary NARAYANA PHYSICS MODULE

JEE MAIN-JR-VOL
JEE-ADV -I
PHYSICS-VOL -I PHYSICAL WORLD


PHYSICAL WORLD
SYNOPSIS
PHYSICS
 Physics deals with the study of the basic laws of nature and their manifestation in different phenomena. The
basic laws of physics are universal and are applied in widely different contexts and conditions.
Physics, Technology and Society
 Science,Technology and Society have strong relationships among one on other. Science is the mother of
technology and both of them are the reasons for the creation and development of the society.
 Science and technology issues are actually discussed worldwide today. Progress in this has led to produce
the ability to integrate different types of physical products.
 Physics is a basic discipline in the category of natural sciences which also includes other disciplines like
Chemistry and Biology. The word physics comes from a Greek word meaning nature.

(1) Some physicists from different countries of the world and their major contributions



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Name Major contribution /Discovery Country of
Origin
Archimedes Principle of buoyancy; Principle of the lever Greece
Galileo Galilei Law of inertia Italy
Christiaan Huygens Wave theory of light Holland
Isaac Newton Universal law of gravitation ; Laws of motion ;
Reflecting telescope U.K.
Michael Faraday Laws of electromagnetic induction U.K.
James Clerk Maxwell Electromagnetic theory; Light - an electromagnetic wave U.K.
Heinrich Rudolf Hertz Generation of electromagnetic waves Germany
J.C. Bose Short radio waves India
W.K.Roentgen X-rays Germany
J.J. Thomson Electron U.K.
Marie sklodowska Curie Discovery of radium and polonium;
Studies on natural radio activity poland
Albert Einstein Explanation of photoelectric effect;Theory of relativity Germany
Victor Francis Hess Cosmic radiation Austria
R.A. Millikan Measurement of electronic charge U.S.A.
Ernest Rutherford Nuclear model of atom New Zealand
Niels Bohr Quantum model of hydrogen atom Denmark
C.V. Raman Inelastic scattering of light by molecules India
Louis Victor de Broglie Wave nature of matter France
M.N. Saha Thermal ionisation India
S.N. Bose Quantum statistics India

NARAYANA GROUP 1

, PHYSICAL WORLD JEE-ADV PHYSICS-VOL - I

Name Major contribution /Discovery Country of
Origin
Wolfgang Pauli Exclusion principle Austria
Enrico Fermi Controlled nuclear fission Italy
Werner Heisenberg Quantum mechanics; Uncertainity principle Germany
Paul Dirac Relativistic theory of electron; Quantum statistics U.K.
Edwin Hubble Expanding universe U.S.A.
Ernest Orlando Lawrence Cyclotron U.S.A.
James Chadwick Neutron U.K.
Hideki Yukawa Theory of nuclear forces Japan
Homi Jehangir Bhabha Cascade process of cosmic radiation India
Lev Davidovich Landau Theory of condensed matter; Liquid helium Russia
S.Chandrasekhar Chandrasekhar limit, structure and evolution of stars India
John Bardeen Transistors ; Theory of super conductivity U.S.A.
C.H. Townes Maser; Laser U.S.A.
Abdus Salam Unification of weak and electromagnetic interactions Pakistan



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2) Link between technology and physics

Technology Scientific prionicple(s)
Steam engine Laws of thermodynamics
Nuclear reactor Controlled nuclear fission
Radio and Television Generation,propagation and detection of electromagnetic
waves
Computers Digital logic
Lasers Light amplification by stimulated emission of radiation
Production of ultra high Superconductivity
magnetic fields
Rocket propulsion Newton’s laws of motion
Electric generator Faraday’s laws of electromagnetic induction
Hydroelectric power Conversion of gravitational potential energy into electrical
energy
Aeroplane Bernoulli’s principle in fluid dynamics
Particle accelerators Motion of charged particles in electromagnetic fields
Sonar Reflection of ultrasonic waves
Optical fibres Total internal reflection of light
Non-reflecting coatings Thin film optical interference
Electron microscope Wave nature of electrons
Photocell Photoelectric effect
Fusion test reactor (Tokamak) Magnetic confinement of plasma
Giant Metrewave Radio Detection of cosmic radio waves
Telescope ( GMRT)
Bose-Einstein condensate Trapping and cooling of atoms by laser beams and
magnetic fields

2 NARAYANA GROUP

, JEE MAIN-JR-VOL
JEE-ADV -I
PHYSICS-VOL -I PHYSICAL WORLD

Fundamental forces in nature : 7) What is the principle involved in the working
 There are four fundamental forces in nature. They of Rocket?
are the ‘gravitational force’, the ‘electromagnetic 1) Newton’s laws of motion
force’, the ‘strong nuclear force’, and the ‘weak 2)Bernoulli’s principle
nuclear force’. Unification of different forces/ 3) Photoelectric effect
domains in nature is a basic quest in physics. 4) Faraday’s laws of EMI
Nature of physical laws : 8) Name the branch of science which deals with
the study of stars?
 (i) The physical quantities that remain unchanged
1) Astronomy 2) Biology
in a process are called conserved quantities. Some
3) Geology 4) Chemistry
of the general conservation laws in nature include
9) Who Discovered the principle of inertia?
the laws of conservation of mass, energy, linear
1) Newton 2) Galileo
momentum, angular momentum, charge, etc. 3) Tycho Brahe 4) Kepler
Some conservation laws are true for one 10) Who invented wireless telegraphy?
fundamental force but not for the other. 1) Maxwell 2) Marconi
(ii) Conservation laws have a deep connection 3) Hertz 4) Faraday
with symmetries of nature. Symmetries of space 11) Match the following
and time, and other types of symmetries play a A-Force B-relative strength
central role in modern theories of fundamental 1) Gravitational force a) 1
forces in nature. 2) Weak force b) 1025


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C.U.Q 3) Electromagnetic c) 1036
force
1) What is the discovery of CV. Raman? 4) Nuclear force d) 1038
1) Inelastic scattering of light by molecules 1) 1-a, 2-b, 3-c, 4-d 2) 1-b, 2-c, 3-a, 4-d
2) Steam engine 3) 1-d, 2-c, 3-b, 4-a 4) 1-a, 2-c, 3-b, 4-d
3) Propagation of EM Waves 12) Match the technology in column A to its
4) Reflection of Ultrasonic waves related scientific principle in column B
2) What is the contribution of S.Chandra Sekhar A- Technology B-Scientific Principle
to physics? 1) Steam engine a) Faraday’s laws
1) cosmic radiation 2) Nuclear model & atom 2) Nuclear Reactor b)Thermodynamic laws
3) LASER 3) Computer c) Nuclear Fission
4) structure and evolution of stars 4) Electric generation d) Digital logic
3) Who discovered electron? 1) 1-b;2-d;3-c;4-a 2) 1-b;2-c;3-d;4-a
1) Albert Einstein 2) J.C. Bose 3) 1-a;2-c;3-d;4-b 4) 1-d;2-a;3-c;4-b
3) J.J.Thomson 4) Bohr 13) Match the scientist’s name against discovery
4) Who discovered Neutron? A-Scientist B-Discovery
1) James chadwick 2) Fermi 1) Faraday a) Expansion of Universe
3) S.N.Bose 4) Millikan 2) Newton b) Law of EMI
5) What is the working principle of Steam 3) Einstein c) Law of gravitation
engine? 4) Hubble d) Theory of relativity
1) Digital logic 2) Super conductivity 1) 1-b;2-c;3-d;4-a 2) 1-b;2-d;3-c;4-a
3) Laws of thermodynamics 3)1-b;2-c;3-a;4-d 4) 1-b;2-a;3-c;4-d
4) Nuclear fission
6) Photocell works on the principle of C.U.Q- KEY
1) Raman effect 2) Compton effect 1)1 2) 4 3) 3 4) 1 5) 3
3) Seebeck effect 4) photoelectric effect 6) 4 7) 1 8)1 9) 2 10) 2
11) 1 12)2 13)1

NARAYANA GROUP 3

, UNITS AND MEASUREMENTS JEE MAINS
JEE-ADV - C.W - VOL -- III
PHYSICS-VOL


UNITS AND MEASUREMENTS
Fundamental Quantities and their SI Units
SYNOPSIS  There are seven fundamental quantities and two
Physical Quantity: supplementary quantities in S. I. system. These
 Any quantity which can be measured directly (or) quantities along with their unit and symbols are given
indirectly (or) interms of which the laws of physics below:
can be expressed is called physical quantity. S.No Physical Quantity SI unit Symbol
 There are two types of physical quantities
1) Fundamental quantities2) Derived quantities 1. Length metre m
Fundamental Quantities: Physical quantities 2. Mass kilogram kg
which cannot be expressed interms of any other 3. Time second s
physical quantities are called fundamental physical 4. Thermo dynamic
quantities. temperature kelvin K (or) 
Ex. length, mass, time, temperature etc.. 5. Luminous
Derived Quantities: Physical Quantities which intensity candela Cd
are derived from fundamental quantities are called 6. Electric current ampere A
derived quantities. 7. Amount of
Ex. Area, density, force etc... substance
Unit of physical quantity: (or) quantity of
 A unit of measurement of a physical quantity is the matter mole mol
Supplementary quantities

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standard reference of the same physical quantity
which is used for comparison of the given physical 1. Plane angle radian rad
quantity. 2. Solid angle steradian sr
Fundamental unit :The unit used to measure the
fundamental quantity is called fundamental unit. Measurement of length
Ex: metre for length, kilogram for mass etc..  The length of an object can be measured by using
Derived unit : The unit used to measure the different units. Some practical units of length are
derived quantity is called derived unit.
Ex: m2 for area, gm cm-3 for density etc... angstrom( Ao )=10 10 m=108 cm
 The numerical value obtained on measuring a nanometre(nm)  109 m  10 A0
physical quantity is inversely proportional to the fermi  1015 m
magnitude of the unit chosen.
micron  106 m
1
U n
n   U = constant X-ray unit  1013 m
1 A.U. = distance between sun & earth
 n1U  n2U
1 2
= 1.496×1011 m
Where n1 and n2 are the numerical values and  One light year is the distance travelled by light in
U1 and U 2 are the units of same physical quantity one year in vacuum . This unit is used in astronomy.
in different systems. Light year  9.46  1015 m
System of units parsec  3.26 light years  30.84  1015 m
 There are four systems of units Bohr radius  0.5  1010 m
1) F.P.S 2) C.G.S Mile=1.6 km
3) M.K.S 4) SI
 Based on SI system there are three categories of
Measurement of mass:
The mass of an object can be measured by using
physical quantities. different units.Some practical units of mass are
1)fundamental quantities Quintal = 100 kg
2)supplementary quantities and Metric ton = 1000 kg
3)derived quantities
Atomic mass unit (a.m.u) =  1.67  10 27 kg

4 NARAYANA GROUP