Last 15 Days

LAST 15 DAYS @JEE

INTRODUCTION

The Joint Entrance Examination (JEE) is conducted for admission to undergraduate engineering programs at NITs, IIITs, other

centrally funded technical institutions, institutions funded by several participating state governments and other institutions. The JEE

(Main) 2015 will be conducted from April 4 - 11, 2014.

The JEE (Main) will also be an eligibility test for the JEE (Advanced), which candidates have to take if they are aspiring for admission

to the UG courses offered by the IITs/ISM Dhanbad.

Type of Examination

JEE (Main) – 2015 shall have two papers, Paper- 1 (B.E/ BTech) and paper-2 (B. Arch./ BPlanning). Candidates may take paper-1 or Paper 2 or

both as per the courses.

Subjects & Questions Pattern

The paper one will comprise in three sections (A, B & C) consisting of mathematics, chemistry and physics having 30 questions from each subject

as equal weightage. The entire paper one will consist of 90 objective type questions with multiple choices.

The paper two will also comprise in three parts as part 1, part 2 and part 3. Part one (Aptitude Test) will consist of 50 objective type questions

with multiple choices. Part two (Mathematics) will consist of 30 objective type questions with multiple choices. Part three (Drawing test) will

consist of 2 questions which will have to be attempted on a drawing sheet given separately.

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JEE Main 2015 Marking Scheme

The maximum marks will be 360 for paper one and 460 for paper two. Each objective type question will carry 4 marks for correct response and

each drawing question will carry the 70 marks for the correct response. Each objective type question will follow by the four options, of which

only one will correct answer. The candidates will have to select the right one among the options. 25% of the allotted total marks to the question

will be deducted for every incorrect answer. Where, there will not any response against any question in answer sheet, the marks will not be

allotted or deducted. In case of two selections among the answers and if anyone will find as correct yet, it will be treated as the incorrect answer

and will be punished with negative marking.

OBJECTIVE Our main objective at present is to align all our preparation towards a good performance in the examination

Important Parameters A better performance during the examination and an efficient preparation with the less amount of time left; can be achieved by following these

four important parameters:

Time management during preparation

Time management during examination

Improving solving speed

Finding shortcuts

Observations Previous years JEE Main question papers with solutions were analyzed and a list of important concepts were prepared and the same were

related with the parameters mentioned below for achieving the main objective (“PREPARATION TO PERFORMANCE LAST 15 DAYS @ JEE”)

Please find below

Conclusion

TOPICS WITH MORE WEIGHTAGE BASED ON PREVIOUS YEARS JEE PAPERS

Time management with preparation

Time management with Performance

Calculation Speed Shortcuts

Accuracy and Precision of measuring instruments

Formulae to be remembered about error calculation, least count etc.,

if formula known takes very less time to solve and probability of a question from this concept is high

Basic algebra, try to use less rough work for practice

Knowing the formulae is the only shortcut

Dimensional Analysis and its applications

Get resolved with any confusion with this topic, solved examples would help in understanding

relatively easy and useful in many questions and consumes very less time

Give a check on the powers of dimensions, same caution must be given here when solving a numerical calculation

Making a note of units of frequently used terms in physics ( like : Force, KE, PE, g etc.,

Motion in a straight line : Position- Time graph, speed and velocity

Needs a bit reasoning try to solve different models of unsolved examples

speed can be improved if work done on conceptualizing the entire question into a diagram

make a note of calculations good idea of linear and quadratic equations would help

Idea of individual formulae would help as a shortcut ( like time of travel and height in vertical motion, and good idea of multiples of 9.8 would help

Projectile Motion

Inculcates vector equations, revise finding the derivations of individual formulae

Conceptualizing the question into a diagram takes time can work on it for these days

values of cos and sin values must be at fingertips, trigonometric formulae can be made accurate

Individual formulae like time of trajectory, range and height and again knowing the multiples of 9.8 would help

Equilibrium of concurrent forces

Appears tough but if time given on understanding the nature and characteristics of forces efficiency increases

work can be done on increasing the speed of getting a free body diagram with all the force components with accuracy

Alignment of angles of force components in free body diagrams can be worked upon to increase calculation

having the direct idea of force components according to angles like ( to align in x

speeds direction cos value is taken and in vertical sin value is generally taken)

Static and Kinetic Friction

Little time consuming but a regular practice on numerical would make life easy

Again free body diagram and speed in terms of finding the angles of line of action of force would help in managing time during performance

Understanding line of action of friction and normal reaction would increase the speed

multiples of 'g' and knowing the already determined individual formulae

Work done by a Constant Force and a Variable Force

During preparation time can be spent on knowing the solving technique. Solved examples can be tried considering different models

Good idea on conceptualizing usage of integration and differentiation in numericals and work on characteristics of forces would help in managing time

Formulae of integration along with trigonometric functions and with upper and lower limit can be revised

Numerical calculations are many in these questions so developing a rappo with magnitudes of quantities ( like mass m = 10 kg) while solving numerical would help since these values often repeat

Conservative and Non Conservative Forces

Revise the formulae along with derivations

Idea of the applications of the formulae would increase speed; observing the applications while writing tests would help

Integration and understanding with graphs would help

Substitutions and checking the options, dimension analysis would help

Elastic and Inelastic collisions in one and two dimensions

A single revision through the entire theory would get rid of most of the confusion

Revise the direct formulae for finding velocities and characteristics of different type of collisions

Involves numericals but pattern in which the question is solved must be well understood to increase the calculation speed Dimensional analysis

Conservation of Angular Momentum and its application

Very important, concentrating on the theory would help in solving the numerical

Clear cut idea on axis of rotation and speed in conceptualizing into a diagram would help

relation between angular velocity and linear velocity and analogy between torque and force would help

Acceleration Due to Gravity and its variation with altitude and depth

A thorough revision of formulae would be helpful

mostly theoretical questions were asked and direct formula usage questions were asked so solving numericals would help

Having a small idea about calculation with constants used in the formulae would improve calculation speed

Knowing the formulae

Orbital Velocity Of Satellite A thorough revision of formulae would be helpful

Solved examples covering different models would help



Stree- Strain Relationship

Revising the theory along with questions would help, any confusion in the concept if cleared would make life easy

clear cut understanding of the graph and load calculation and its conversion to stress and strain for different matter would reduce time taken to find a solution



Young's Modulus


clear cut understanding of the graph, load calculation and its conversion to stress and strain for different matter would reduce time taken to find a solution



Pressure due to Fluid Column

Easy questions are asked in this topic solving unsloved numericals would help

can be increased by understanding the concepts of atmosheric pressure and relationships between pressure height, pressure force, density mass and clear cut idea about relative specific densities would be helpful

Diagrammatic approach helps in calculating the solution

Pressure and energy relationship is a direct shortcut which covers all the concepts

Application Of Surface Tension- Drops, bubbles and Capillary Rise

Basic revision of all the formulae and solving numericals with keeping the derivations of the formulae in hand would help

learning’s from pressure calculations would help

Numerical calculations can be worked upon


Heat, temperature, Thermal Expansion

Can try to improve upon understanding 'terms' in a formulae

precise understanding with each and every term helps and

Having a small idea about calculation with


solved examples have to be given more attention to understand the terms

constants used in the formulae would improve calculation speed

Specific Heat Capacity, Calorimetry

Can try to improve upon understanding 'terms' in a formulae

precise understanding with each and every term helps and solved examples have to be given more attention to understand the terms



Heat Transfer- Conduction, Convection and Radiation

Mostly theoretical questions are asked and numericals in terms of material properties are being asked so solving numericals along with theory would help

Attention can be given on solving technique as the process of solving is necessary


Theory can be lined as a single bulletin point to remember

Concept Of temperature

Generally very easy questions and less time consuming questions are being asked from this topic a basic revision would help a lot

Mostly questions are theoretical. Having all the required synopsis at fingertips would help

Change in temperature calculation can be made more easy and speed can be increased


Second Law Of Thermodynamics

Solved examples would help in improving the understanding

These questions are mostly asked mixed with other concepts so usage of other concepts while solving questions of this topic can be observed



Reversible and Irreversible Processes

Solved examples would help in improving the understanding

These questions are mostly asked mixed with other concepts so usage of other concepts while solving questions of this topic can be observed



Concept Of pressure

Generally very easy questions and less time consuming questions are being asked from this topic a basic revision would help a lot

Mostly questions are theoretical. Having all the required synopsis at fingertips would help

Change in pressure calculation can be made more easy and speed can be

Having a small idea about calculation with constants used in the formulae

increased would improve calculation speed

Periodic Motion - Period, Frequency, displacement as a function of time

Numericals are generally time taking so an understanding of the process on solving numericals and observing the relations between angular velocity to frequency and time would help

Practicing different models of unsolved examples would help


Clear cut idea on derivation of the formulae is the original shortcut

S.H.M and its equation.





Oscillations Of a Spring- Restoring Force and Force Constant





Fundamental mode and harmonics





Forces Between multiple Charges

Formulae revision must be done and questions are not that conceptual solving unsolved examples would help

Vector addition plays an important part and processes like integration would be helpful



Electric Field Lines Questions are generally easy a revision of all formulae would help

Vector addition plays an important part and processes like integration would be helpful



Gauss's law and Its Applications to find Field due to infinitely long uniformly charged straight wire



Processes like integration and solving techniques plays an important role in calculations


Combination Of Capacitors in Series and parallel

Questions are very easy and consumes less time a little patience in seeing the formulae

If formulae is known it takes very less time to solve minimum questions using different formulae

Numerical calculation can be done with more accuracy and speed


Capacitance of a parallel plate capacitor with and without dielectric medium between the plates

Get rid of any confusion in the concept and solved examples would help

Good idea on terms of formulae would help

Mathematical operations with characteristic constants must be taken careof


Electrical Resistance Concentrate on different models

Mostly numericals are repeated so have an idea of the end result with many resistance combinations


idea on current and voltage distribution across the circuit would serve as a shortcut at times

Combination Of Cells in Series and parallel Concentrate on different models




Potentiometer- Principle and its applications Concentrate on different models




Ampere's Law and its applications to infinitely long current carrying straight wire and solenoid

Generally straight questions are asked solving unsolved numericals with keeping formulae in hand would help

Formulae remembrance would take time if individual formulae is at your fingertip it would help managing the time

Vector addition, sin and cos values, integration and differentiation can be used


Force on a current carrying conductor in a uniform magnetic field

Generally straight questions are asked solving unsolved numericals with keeping formulae in hand would help

Formulae remembrance would take time if individual formulae is at your fingertip it would help managing the time

Vector addition, sin and cos values, integration and differentiation can be


used

Current Loop as a magnetic dipole and its magnetic dipole moment

Get rid of any confusion in the concept and solved examples would help


Mathematical operations with characteristic constants must be taken care of


Earth’s magnetic Field and Magnetic elements



Solving technique plays important role in calculation


Faraday's Law, induced EMF and Current



Solving technique plays important role in calculation


LCR series circuit, resonance

Liittle confusing but mostly direct questions are asked try solving some easy questions and improve confidence


Involves numericals but pattern in which the question is solved must be well understood to increase the calculation speed


Electromagnetic waves and their characteristics

Theoretical questions are asked, daily a revision all the characteristics would make us gain easy marks

Less time consuming basically theoretical questions NA Knowing the theory

Electromagnetic spectrum

Theoretical questions are asked, daily a revision all the characteristics would make us gain easy marks


Reflection and refraction of light at plane and spherical surfaces, mirror formula

Practice maximum number of questions on this topic as topics are not that confusing and numericals take less time

Knowing individual formulae rather than deriving on the examination day would help in reducing the time

Conceptualizing question into diagram is the place to work on

Knowing the formulae and mostly calculations involving repeated numericals would be given emphasis

Deviation and Dispersion of Light by a prism

Don’t concentrate on theory, practicing the numericals would help

Knowing individual formulae rather than deriving on the examination day would help in


Knowing the formulae and mostly calculations involving

reducing the time repeated numericals would be given emphasis

Lens Formula

Dont concentrate on theory practicing the numerical would help



Knowing the formulae and mostly calculations involving repeated numericals would be given emphasis

Coherent Sources and Sustained interference

Mostly theoretical questions are asked a thorough revision with the theory is to be planned


Brewster’s Law, uses of plane polarized light and polaroid’s

Mostly theoretical questions are asked a thorough revision with the theory is to be planned


Energy Levels



Mathematical operations with characteristic constants must be taken careof


Semiconductor Diode


Mostly theoretical questions are asked a good memory of all the bulletin points would help NA Knowing the theory

I-V Characteristics in forward and reverse Bias





I-V Characteristics of LED





Solar Cell and Zener Diode Revising the theory along with precise understanding with Mathematical Clear cut idea on

questions would help, any confusion in the concept if cleared would make life easy

each and every term helps and solved examples have to be given more attention to understand the terms

operations with characteristic constants must be taken careof

derivation of the formulae is the original shortcut

Transistor as an amplifier and oscillator

Dont concentrate on theory, practicing the numericals would help




MATHS:

TOPICS WITH MORE

WEIGHTAGE BASED ON

PREVIOUS YEARS JEE

PAPERS

Time management with

preparation

Time management with

Performance Calculation Speed Shortcuts

Quadratic Equations

Nature of roots Revise the topics related to

delta

Solve using Graphs of Discriminant

and Coeff.

Properties of

Discriminant

Condition for

common roots relation between roots and

co-eff

Eg. Graph: upward facing, will not touch the axis when

D<0, a>0

Properties of roots

of equation

Complex Numbers

Modulus and argument

De moivre's Theorem, Cube

roots of unity, Sum of the roots

of unity, Euler form of complex

number

Try to figure out modulus and

argument without doing any rough

work

Scoring topic,

solve problems of

each kind

Matrices

Adjoint and Inverse

Matrix

Solve Inverse of a matrix using

minores, cofactors and adjugate

Remember A is invertible if and only

if det(A) is not equal to 0

Mainly derivation

based, try to solve

in less time

While all

invertible matrices

are square, not all

square matrices

are invertible

Permutations and

Combinations

Meaning of P (n,r) and C

(n,r) and simple

applications

Questions based on

applications, Solve a problem

for each subpart

Concept based

questions,

Revise all the

formulae,

remember circular

permutatn and

handshake prblm

Sequences and Series

Ap and Gp Solve combination of AP and

GP probs

Formulae based chapter, practice

series questions

Remember, nth

terms of AP, GP,

relation between

AM, GM and HM

like

AM*HM=GM2

limits,Contiunity and

Differentiation

Rolle's and Lagrange's

mean value theorems

Sandwich Theorem, Direct

Substituion method,

factorization method, limits at

infinity

Should know that lmvt is generalised

version of rolle's theo, solve

inequalities using lmvt

L'hospital rule, can

be used in lots of

questions, quick to

solve

Differentiation of

sum,product of 2

functions

Learn quotient rule, product

rule, chain rule, implicit

differentiation, higher order

derivatives etc

Practice enough

questions

Graphs of simple

functions, Algebra of

functions

Focus on maxima-minima, inc

and dec functions, inflexion

points etc

Try finding domain and range just by

looking at the graph, number of

intersection points of two functions

Try to be accurate

and quick in

drawing graphs

Integral Calculus Most Questions are asked from

this topic

Integral as anti derivative Main Focus: Fundamental

theorem of calculus

Remember all

Properties and Evaluation

of definite integrals

Focus on topics like area under

the curve,

Most important topic, used in physics

as well, interlinked topics like

fundamental theorem of calculus and

its properties

Spend a lot of time

in solving these

questions, will be

helpful in physics

like in finding

cylindrical and

spherical

coordinates etc.

Remember

properties of

definite integral

Integration by parts,partail

fractions and by

substitution

Has very good usage in various

topics solving different model

questions would help

Making a note of changes with some

particular substitutions would help

Clear cut idea of

the process would

help in increasing

calculation speed

Try to use less

rough work while

practice

Differential Equations

ODE Soving technique can be

empasized while preparation

Knowing individual formulae rather

than deriving would help

Need good amount

of practice and

memorizing skills

Co-Ordinate Geometry

distance formula Questions asked from it are

generally easy

Improving to get all the observations

like ( X- intercept, Y intercept, slope

etc.,) just from the equation would

help

It includes both

variables and

numericals so fast

numerical

operations would

help

Try to use less

rough work while

practice

Slope of a line Questions asked from it are

generally easy

Usage of differentiation and angle

calculations can be worked upon

It includes both

variables and

numericals so fast

numerical

operations would

help

Try to use less

rough work while

practice

Intercepts Questions asked from it are

generally easy

increasing speed in Conceptualising

the question into diagram can be

worked upon

It includes both

variables and

numericals so fast

numerical

operations would

help

Improving to get

all the

observations like (

X- intercept, Y

intercept, slope

etc.,) just from the

equation would

help

Straight lines

Various Forms of

equation of line

Slope intercept from,

parametric form

Remember condition for two lines to

be parallel and perpendicular

Improving to get

all the observations

like ( X- intercept,

Y intercept, slope


equation would

help

knowing the

formulae

Interesection of lines

increasing speed in

Conceptualising the question

into diagram can be worked

upon

Read everything in pair of straight

lines

Improving to get



Y intercept, slope


equation would

help

knowing the

formulae

Angle Between two lines remember the formula of theta

at the point of intersection

A bsic idea on concepts like

conjugate, alternate, corresponding

angles etc., would help

Improving to get



knowing the

formulae

Y intercept, slope


equation would

help

Circle and conic sections

circle equation

Keeping concept of locus in

back of mind while solving

numericals would help

Try figuring out radius, centre, length

of intercept & equation of tangent of a

circle just by looking at the equation

of the circle

When you come

across a question

first draw the

figure and now see

if there are

perpendicular

bisectors then

circumcentre may

be present, if

angular bisectors

then the incentre, if

altitudes are

present then either

orthocentre is there

Important

formulae of circle

equation of a tangent question based on points of

tangency, interlinked topics

remember equation of tangent for each

conic section NA NA

(parabola,hyperbola and

ellipse) in standard forms

solve interlinked conic sections

problems NA

Focus on finding

focus,eccentricity

and directrix by

looking at the

equation

NA

points of tangency

Interlinked questions of point

of tangency and calculus are

frequently asked, focus on such

questions

NA NA NA

3-D geometry

co ordinates of a point in

space Image of a line in the plane

Can work on improving skills getting

the most from the 'given' of a question

application of

formuale with

relevant properties

can be worked

upon

Knowing the

formulae

Angle Between two lines Vector algebra application can

be empasized while practice

Direct idea of getting the angles

through dot and cross product can be

worked upon

application of

formuale with

relevant properties

can be worked

upon

Knowing the

formulae

Vector Algebra

Scalars and Vectors Finding lambda value, direct

questions asked

Increasing the speed in numerical


Clear cut idea on

usage of specific

process for specific

question can be

concentrated while

practice

Knowing the

concepts and a

good imagination

would be a good

shortcut

Statistics

calculation of

mean,median and mode Formula based questions



application of

formuale with

relevant properties

can be worked

upon

Knowing the

formulae

variance and mean

deviation Formula based questions



application of

formuale with

relevant properties

can be worked

upon

Knowing the

formulae

Probability

probability of an event Solving more examples with Increasing the speed of understanding Numerical Knowing the

solution would help the question can be worked upon calculations can be

worked upon

formulae

Trigonometry

Trigonometrical functions

Read all trigonometric

identities, product to sum

formula, half angle formula

Its all about practice, revise questions

which you have done earlier

Formulae usage is

generally lengthy

having complete

confidence on the

formulae used

actually increases

the speed

Knowing the

formulae

Heights and Distances Solving more examples with

solution would help

Increasing the speed of understanding

the question can be worked upon

Numerical

calculations can be

worked upon

Knowing the

formulae

Mathematical Reasoning

Understanding of tautology, contradiction, converse and

contrapositive

CHEMISTRY:

TOPICS WITH MORE WEIGHTAGE

Time management with preparation Time management with

Performance Calculation Speed

Organic Chemistry

Alcohols, phenols, carboxylic acid, ethers, ketones , aldehydes

Be through with named reactions ,Physical and chemical Properties

Solve more amount of reactions with proper time management

Amines, diazonium salts Be through with all the chemical properties

Polymers Just be through with all the examples of each kind of polymer

Biomolecules Every year a theory question has been asked from this topic so dont neglect this topic at all

Inorgainc

S Block,P Block and D Block elements

Dont Except any direct questions from this topic all questions from this topic would be interlinked to some or other topic so try to gain the max knowledge about the electronic config ,Ip values and the IE values this is most scoring topic

have the outer most config of elements on in mind

Co-ordination compounds

Try to understand the basic concepts of how to obtain the primary and secondary valency once u r done with this part all problems popping out of this concept would be easy adn try to apply different kinds of isomerisms on co-ord compounds

Environmental chemistry

Physical

Basic concepts Be through with all the basic formula's of all concepts related to mole concept

Have a idea of molecular weights of at least first 40 elements of molecular weights

States of matter

kinetic theory of gases

solid state Questions are generally asked from packing fraction of bcc and fcc structures

Have a list of formulas in mind related to bcc, fcc packing fractions

Bohr's model of hydrogen atom

Be through with all the formulas don't neglect the conclusion of Bohr's postulates

Quantum Numbers

Fundamentals , first law and second law

should have idea about each and every conditions dependent or independent on pressure , volume etc. properties,good concepts on spontaneous and non spontaneous reactions

remember all conditions with some live examples e.g. boling of water in an open vessel is open system

good hold in multiplication of decimal numbers will increase your calculation speed.

surface chemistry

Adsorption , catalysis

meaning of adsorption, conditions for adsorption process, role of catalyst in a reaction , different types of catalysis understanding

solve questions related to adsorption and thermodynamics concepts ,

strong concept will increase approach to the question.

reactions in which catalyst proceed the reactions are important from surface chemistry

Chemical kinetics

rate of chemical reaction

good knowledge of orders of the reaction and its calculation, half life and activation energy concepts and formulas ideas

solve questions using arhenius equation, and order of the reaction

practice will increase speed for solving questions of chemical kinetics

Redox reaction

know the difference between oxidation and oxidising agent , know the elements which shows oxidising and reducing property, every year there is a question from redox reaction so concentrate on this topic more while prepration

increasing and decreasing order of different elements from periodic table will make your concept strong of redox reaction

solving previous years questions of redox will increase your accuracy of solving.

Electrochemistry

Be through with Nernest Equation , this equation holds complete of electrochemistry, have a good idea about the constraints of this equation

It has vast amount of applications its almost interlinked with every concept so solve more amount of interlinked dont just solve direct questions related to nernest eqn

Solve previous years questions of Nernest eqn which will give you idea how this can linked to other concepts

Molar conductivites and variation with concentration

Be through with applications of Kohlrausch’s Law and Debye Huckel equation in Jee examination these are the 2 laws where the questions would be coming from so have a very good idea of all the applications related to this topic and note down the equations related to strong and weak electrolytes which reduces your confusion and increasese your strength in this region

Solve as many questions as many possible because it has as a vast amount of applications related to these topics and you can decrease the your confusion related to this topic on the regard of how to solve a problem with different approachs

law of chemical equilibrium, equilibrium concepts(kp and kc),Le chatlier's principles

Mostly questions are asked in logical way . Make sure that you are strong not only in numericals but also on theory based problems of this chapter.

Perception & Motivation:

try to improve our rank.

Tension, stress and other factors actually our winning points as they make us focussed and move away from deviations.

1 hour of preparation in this time is almost equivalent to 3 hrs of preparation in normal time.

No need to panic just realize your strengths (even before crossing seven oceans Hanuman was made to realise his strengths )

FOR YOU Important to maintain health. Eat good food and stay fresh and it’s really not the time to think before you start. Start and think, imagine when

you are answering an examination ideas come with the natural flow, if you follow all these things ideas and answers come in the natural flow.

All the best.

REGARDS

GURUGUIDANCE @PLANCESS JEE

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