Thursday, August 27, 2020
Friday, August 21, 2020
Dual Nature of Matter
The whole energy in this universe is in the
form of matter and electromagnetic energy. Radiation behave as both as wave and
particle. Radiation wave nature is describes by interference, diffraction, polarization
etc .Radiation particle character is described by photoelectric effect, Compton
effect etc. the nature loves symmetry. As the radiation got dual nature, matter
should also posses dual nature.
Thus a wave is associated with energy moving particle. These waves are called
de Broglie waves or matter waves. Electron has particle nature. But Davisson
and Germer experiment proved the wave nature of electron also.
Thursday, August 20, 2020
Monday, August 17, 2020
Some Tips , Tricks & Strategy for JEE Main & NEET 2020
Some
Tips , Tricks & Strategy for JEE Main & NEET 2020
It is important to follow the preparation
tips of JEE Main & NEET 2020 to be able to ace the entrance exam.
Books & Syllabus – One has to be aware of the
books and syllabus of JEE Main & NEET 2020 before the preparation starts. Please go through the syllabus and for all books give below.
Plan Everything – For Exam, “If you fail to plan, you
are planning to fail”. Nothing in the preparation procedure will start and
progress if not planned. So, before starting the preparation, candidates need
to plan how they will prepare. The plan has to be made keeping in mind all the
practical possibilities of completing it, making castles in the air will
certainly not help.
Make a proper time-table for yourself - this would
divide your study and activities time.
Understand the concepts thoroughly . -JEE & NEET questions are not direct
like that in school and need you to apply different concepts. Thus, having a
proper understanding of the concepts is necessary.
Note of important formulas and theorem - Making a note of important
formulas and theorem comes handy while solving numerical based questions in
Mathematics and Physics. This also helps to quickly revise all important
theorems and formulas.
Take Small Breaks – Whenever bored or tired of
studying, take breaks. Mind works better if involved in different activities at
different hours. Walk, play, dance, sing, meditate, go for a movie etc. Do
anything that helps rejuvenate. Make sure that involvement in different
activities is not tiresome and for a very long time because STUDYING is the
priority at the moment.
Revision – Whenever done with a topic,
revise it. This forms as an important part of preparation. As the syllabus is
vast, there is a possibility that learning new topics might erase off the
previous ones. Keep revising while learning.
Test yourself – Evaluation is equally
important as preparation. Take up previous years question papers in this app
and solve them at regular breaks. We recommend first trying the Unsolved Papers
first and then If you are struck somewhere see the video solutions .
Stay optimistic - Lastly, Always try to keep a positive
approach not only towards your studies, but also rest of the activities.
This will keep your mind stress free, ultimately boosting confidence. Include
fresh fruits and vegetables in your diet instead of munching on fizzy drinks
and junk foods. Do some mild exercises regularly like a morning walk, a little
bit of stretching, etc. to keep yourself healthy and active.
PHYSICS
Golden Tip for Physics Section -
Make short notes as you go
through each of the topics. This is a good reference tactic during the last
days of the exam as it allows you to check the topic without opening the text
book and going in detail.
Most Important Chapter for JEE
Mains Physics Topic Weight age
1. Mechanics, Electricity &
magnetism 40%
2. Basics of Vectors, Units &
Dimensions 5%
3. Newton’s law of motion &
Kinematics 5%
4. Electrostatics 5-7%
5. Nuclear Physics 7-8%
6. Modern Physics 15%
7. Semi-Conductors &
Electronics Devices 5%
8. Optics 15%
CHEMISTRY
Golden Tip for Chemistry Section -
JEE Mains Chemistry is more about
memorizing concepts. The syllabus of the Chemistry is not as vast as JEE Mains
Physics, but candidates must not undermine this section. The Basics of
Chemistry are chemical elements. If you want to make the most out of JEE Mains
Chemistry section, you need to memorize the Periodic table.
To memorize names, atomic
numbers, symbols, atomic weights of all elements in the Periodic table, you can
make some Mnemonic, short slogan or catch-phrases. To memorize the Name
equations & important formulas, make a flash card or cheat sheet. There is
no shortcut to learning chemical equations & formulas. So, it is better to
practice these again & again.
Most Important Chapters for Chemistry
With Weight age
1.
Physical Chemistry 35%
2.
Inorganic Chemistry 30
%
3.
Organic Chemistry 35
%
MATHEMATICS
Golden Tip for Mathematics Section-
Never start with a difficult problem. If
you can’t solve few initial problems, it will make you anxious & hence it
will affect your overall performance in JEE Mains paper. Start preparing for
mathematics from the scratch. Solve the easier mathematical problems first
& then progress towards the difficult ones.
Most Important Chapter for JEE Mains
Mathematics with Topic Weight age
1. Integration 8%
2. Probability and Statistics 7%
3. Derivatives, Limits, and Continuity 7%
4. Parabola & trigonometric
ratios 6%
5. 3-D Geometry 5-6%
6. Theory of Equations
5%
7. Vector Algebra 5%
8. Complex Numbers 5%
9. Sequence and Series 5%
10.
Matrices and Determinants 4%
Best Books For JEE Mains 2020
NCERT Books - The
NCERT Books of Physics, Chemistry and Math's of 10+1th and 10+2th are a
preferred choice for JEE Mains. They Contain right amount of information in an
easily understand able way. The students must go through these books.
Old Question Papers - Students must
go through the previous year's JEE Mains Question Papers.
Must have books for JEE MAINS Preparation
PHYISCS
1.
HC Verma Concept of Physics Part 1.
2.
HC Verma Concept of Physics Part 2.
3.
IIT JEE Physics by D.C. Pandey.
4.
Problems in General Physics By I.E. Irodov.
5.
Physics for IIT JEE by Resnick. Halliday, Walker.
6.
Problems in Physic by S.S. Krotov.
7.
Errorless Physics Vol. I and II.
CHEMISTRY
1. Organic Chemistry by Morrison Boyd.
2. Organic Chemistry by O.P. Tandon.
3. Inorganic Chemistry by O.P. Tandon.
4.Modern approach to chemical Calculations by
R.C. Mukherjee.
5. Numerical Chemistry by P. Bahadur.
6. Concise Inorganic Chemistry by J.D. LEE.
7. Errorless Chemistry Vol. I And II.
8. Advance problems in Physical Chemistry for
competitive Examination by Kumar
Neeraj.
9. MTG Objective Chemistry.
MATHEMATICS
1. IIT Mathematics by M.L. Khanna.
2. Differential Calculus by A Das Gupta.
3. Class XI and XII Mathematics by R.D.
Sharma.
4. Trigonometry, Geometry Books by S.L.
Loney.
5. Problems in Calculus of one Variable by
I.A. Maron.
6. Higher Algebra by Hall and Knight.
7. Errorless Mathematics Vol. I and II.
8. Objective Mathematics Arihant Vol. I and
II.
General science questions with answer
Q which is not a green house
gas?
a.oxygen
b.carbon dioxide
cwater wapours
d.methane
Ans -a
The primary greenhouse
gases in the Earth's atmosphere are water vapor,
carbon
dioxide, methane,
nitrous
oxide, and ozone.
the major atmospheric constituents, nitrogen (N2), oxygen (O2), and argon (Ar), are not
greenhouse gases
Q What exist inside the
nucleus????????????
Ans – Protons and
neutrons. Electrons does not exist
Q which planet have no
atmosphere?
a.jupiter
b.mercury
c.venus
d. Saturn
Ans . Mercury
Q ;The gases used in normal
welding process
a.oxygen and hydrogen
b. oxygen , hydrogen
and acetylene
c. acetylene and
nitrogen
d. Oxygen and acetylene
ans - d
Q.Which of the
following is most commonly used for cloud seeding (artificial raining)?
a.magnesium hydroxide
b.potassium chloride
c silver iodide
d.zinc sulphate
ans - c
The first metal to be
used by man was
(A) Alluminium
(B) Copper
(C) Silver
(D) Iron
Ans - b
Q what is meant by
sulphur shower?
a.sulphuric acid rain
due to air pollution
b.shower of yellow
pollen from conifers in spring
c.an industrial process
to treat porcelain with sulphuric acid
d.realease of hydrogen
sulphide from industries
Ans - b
Q.A theodite is used
for measuring
a.ocean temperature
variation
b.celestial distances
c.river water flow
d.angles in horizontal
and vertical planes.
Ans - d
Q At which point of
earth there is no gravity?
a.at north pole and
south pole
b. at equator
c.on the ocean surfaces
d.at the centre of
earth
Ans- at the centre of
earth
Q what is the main
chemical component of vinegar?
a.Acetic acid
b.citric acid
c.tartaric acid
d.nitric acid
Ans – a
Q which is not a
jovian(gaseous planet) in the solar system?
a.jupiter
b.saturn
c.venus
d.naptune
c
There are four gas
giants in the Solar System: Jupiter, Saturn, Uranus and Neptune.
which of the following
is basic structural and functional unit
of kidney?
a.lymphocite
b.nephron
c.lobule
d.neuron
b
Q.which is the only
internal organ of human body capable of regenerating its lost tissues?
a.lungs
b.kidney
c.liver
d.brain
c
Qwhich of these is not
a micronutrient essential for plant growth and health?
Manganese
iodine
Boron
Zinc
c
The microminerals or trace
elements include at least iron, cobalt, chromium, copper,[2] iodine, manganese, selenium, zinc and molybdenum.
Q which is not a
jovian(gaseous planet) in the solar system?
a.jupiter
b.saturn
c.venus
d.naptune
c
There are four gas
giants in the Solar System: Jupiter, Saturn, Uranus and Neptune.
Resistance, Reactance and Impedance
What is the difference between resistance,reactance and impedance for an ac circuit?
Ans..
1. Resistance -Ohmic resistance offered by a conductor connected in the ac circuit.It is due to the nature of material of the conductor.
Resistance is independent of the frequency of the source of current.
2. Reactance- Resistance offered by inductor or capacitor connected in the circuit.
It arises due to the fact that the alternating emf and current differ in phase by 90 degree, when ac passes through inductor or a capacitor.
Reactance is dependent on the frequency of the source of current.
3. Impedance- Resistance offered by the LR circuit or CR circuit or LCR circuit.
Impedance is dependent on the frequency of the source of current.
Sunday, August 16, 2020
Expansion of universe
Astronomy
is one of the oldest and most profound of the sciences. Edwin Hubble, an
American astronomer found that stars are not uniformly distributed throughout
space, but are gathered together in vast collections called galaxies. By
measuring the light from galaxies, Hubble could determine their velocities. Hubble
was the first to realize that all galaxies are moving away from us. Moreover, according to Hubble the
further galaxies were from us, the faster they were moving away. The more
distant the galaxy, the faster it was receding, with a speed proportional to
its distance away (Hubble's law).The ratio of speed to distance is always the
same number and is called the Hubble's constant. The universe was not unchanging with time as
everyone had thought previously. It was expanding. The distance between distant
galaxies was increasing with time.
The expansion of the universe was one of the most important intellectual
discoveries of the 20th century. It indicates toward an important point whether
the universe had a beginning. If galaxies are moving apart now, they must have
been closer together in the past. Hubble’s law sets a limit on the age of the
universe. Because universe is continuously expanding, if we trace the expansion
back to the beginning point, we can work out how long ago that was. It turns out to be
approximate 15 billion years. Was this the beginning of the universe? The age of our
Milky Way galaxy has also been calculated in two ways. First method is by studying
the observed stages of evolution of different sized ancient stars in globular
clusters.
A second method for estimating the age of our galaxy is based on the present
abundances of several long-lived radioactive elements in the solar system.
According to these calculations, the age of our galaxy is again comes out to be
approximate 15 billion years.
Positive Thoughts for life
1.
You
cannot change your future, but you can change your habits, and surely your
habits will change your future.” — Dr. A.P.J. Abdul Kalam
2. Look at the sky. we are not alone. The whole universe is friendly to us
and conspires only to give the best to those who dream and work.” ― Dr. A.P.J. Abdul Kalam
3. “To succeed in
your mission, You must have single-minded devotion to your goal.” ― A.P.J. Abdul
Kalam
4. “Dream, Dream, Dream, Dream transform
into thoughts and thoughts result in action.” ― Dr. A.P.J.
Abdul Kalam
5. “You have to
dream before the dream comes true.” —A.P.J. Abdul
Kalam
6. “Everything comes to us that belongs to
us if we create the capacity to receive it.” Rabindranath Tagore
7. A man is but a product of his thoughts. What he thinks he becomes. Mahatma Gandhi
8. If I have the belief that I can do it, I shall surely acquire the
capacity to do it even if I may not have it at the beginning. Mahatma Gandhi
9. “The power of
concentration is the only key to the treasure-house of knowledge.” ― Swami
Vivekananda
10. “Arise, awake
and stop not till the goal is reached.” ― Swami
Vivekananda
11. “Believe in
yourself and the world will be at your feet.” ― Swami
Vivekananda
12. A winner is a dreamer who never gives up. Nelson Mandela
13. Education is the most powerful weapon which you can use to change the
world.
Nelson Mandela
14. Yesterday is gone. Tomorrow has not yet come. We have only today. Let
us begin.
Mother Teresa
15. Kind words can be short and easy to speak, but their echoes are truly
endless.
Mother Teresa
16.
If you can't fly then run, if you can't run then
walk, if you can't walk then crawl, but whatever you do you have to keep moving
forward. Martin Luther King, Jr.
17.
We are Indians, firstly and lastly. B. R. Ambedkar
18.
To be successful in life what you need is education. Jawaharlal Nehru
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