Strategy to solve I.E. Irodov

You can refer this answer for a discussion on Irodov, my pattern to solve it, and how you should solve it.

You can find the solutions to Irodov in these books. These are in the latest edition, so you can order them from here-



These are the solutions I consulted, and they are really clear and crsip. Note that the second book might get out of stock soon, so you can use the kindle edition. It's economical, and environment friendly. Also, you must try a question on your own until you really need the solution.

Here is a list of problems from Irodov which are in JEE syllabus(sorry for the sideways orientation) :p.

Also see: Best books for JEE preparation, Organic Chemistry, Mechanics, Algebra, Motivation

Coordinate Geometry, 3D, and Vectors

This is usually counted among the tough topics. Because it involves a lot of formulae and calculations(at times) and hence costs a lot of time during exam. You might wanna be very fast in calculations before moving here. So prepare your algebra well!

So, the topics will be 

1. Straight Line and Basics- This is the most important chapter because this forms the basis of other chapters. There would be various forms of lines, and you must be familiar with each and everyone of them. There would be lots of definitions in this chapter(orthocentre,incentre,etc.)Lots of formulae, learn them all by heart.  Shift of origin and family of lines are two important topics which will help you solve questions fast. Practice a lot, and different types of question, don't solve 10 questions of the same type. Solve 10 questions of 10 types(i.e.1-2 questions of each type).

2. Circles and Conic sections- You must be well prepared with formulae of equations in standard form, parametric form, positions of foci, vertices, length of latus rectum,etc. tangent, normal, etc. Joint equation of curves and lines is very helpful at times. There are a few special results(e.g. reflection properties of parabola and ellipse). It's tough to remember them all in one go. Take your time and try to apply them in questions to learn them. Do a lot of locus problems. Again, lots of types, and solving many problems of different types will help you.

3. Vectors and 3D- 3D is just a continuation of 2D Geometry. Have a good thinking of the problem in 3D. It will help you. Again, formulae-remember them. You won't face much problem in 3D. Vectors would give you problems :p. Well, try to think of vectors in terms of 3D when in trouble. There are a few standard techniques(taking dot product, cross product with something, etc.) try to implement them and see if they help. Keep on solving a variety of problems. Various lines forms get confusing. Tricky questions can be easily formed in vectors. Try to think of all the formulae available to you. It will surely help. Again, this is mostly based on revising and practicing. 

So, Coordinate Geometry, Vectors and 3D are mostly calculation based, with a handful of central concepts which apply to all the problems and situations. If you study it deeply you would find beautiful connections between various formulae and situations. I'll leave them for you to discover(NCERT style :p).

BOOKS

As usual, if you go to a coaching, follow that book. If you don't you can take this book from Resonance. I can't find the link for other books, so you'll have to take the ones mentioned below(I was from Resonance and found their study material pretty good).

If you want more practice, go for Arihant coordinate geometry and Vectors and 3D.

S.L. Loney is another beautiful book, with some very good questions. It is surely worth solving, if you have time. Apart from this, A. Das Gupta has some really nice questions in 2D coordinate geometry. Do solve them if you want a very good grasp and rank.

So, do well in coordinate and Vectors and 3D. They carry a huge weightage. They need some revision and practice. Give your best, and let me know if you have any doubts by commenting below.

All the best!!!

Also see : Calculus, Algebra, Trigonometry, Best books for JEE

Revision in class 12

Hi guys!!!

Many of you had been asking me for a post on revision. Especially students of class 12. At this moment class 11 students don't have much to revise, so this post is mainly for students of class 12. But I recommend everyone to read it(so that class 11 students can avoid common mistakes people usually commit).

So there would be two kinds of students-

1. Who studied well in class 11(i.e. all their concepts are clear, they didn't leave many topics, practiced a lot, remember all formulae, equations, reactions, etc.)
2. Those who didn't study very well(i.e. have many backlogs, have forgotten many concepts, or don't remember them very well, or just didn't prepare for the exam).

Both kinds of people need to revise well now. But the strategies would be different. Don't feel bad if you didn't study well in class 11, you can still do wonders. Just follow the below guidelines sincerely, and I assure you good revision.
Coming to those who have studied well in class 11. You might be students aiming at IITs, and are really serious about it. You might be aiming for a top 100 or 50 finish. You have studied well in 11th. Half the job done. Now, make sure you don't get relaxed now and study even more. Attend all classes in 12th and clear every doubt. Make sure you understand class 12th well too. Now coming to the revision part, you should take out a fixed amount of time everyday(or make a few big slots every week). Make a diary and list all the topics in which you feel the slightest of doubt. Then pick up few of them everyday and design a schedule as to when are you going to cover them(you can adjust on the basis of your coaching test schedule maybe). Read theory quickly first (short notes help in this, and I recommend you to make them if not done yet) and then practice some good quality questions. Try to cover all major types of questions so that you revise everything(marking important questions while solving a book/coaching module helps in this process, so do it now if you haven't done it before). Try to give regular tests so that you have an idea of your progress. Also, try to mark yourself after every revision session. Use a timer to time yourself. Make sure you analyze,e your mistakes during those sessions. This will improve both speed and accuracy.

Now coming to students who didn't study well/didn't study at all in class 11, you have lots of time left. 1 year is enough to score any range of marks in JEE. I mean it. Just be patient and follow these points-

First of all, sit-down, take a copy and note down all the reason which due to which you couldn't study. Was it lack of awareness? Lack of commitment? Lack of hard work? Lack of Intelligence(well trust me on this, JEE doesn't need intelligence. All the intelligence factors fades away if you work hard enough).

Try to remove that as much as possible. You have already wasted a year. If you can't focus now, I am sorry, you can't make it. But if you are ready to focus, it's not that tough.

Coming to the point, first list the topics into three categories- topics you are comfortable with, topics which you are okayish with, and topics you don't know at all. Now sit with a teacher and sort the list on the basis of their importance in class 12 topics (e.g.- Ionic Equilibrium is required for Electrochemistry). Now sort it such that the most important topics come at the top. Starting from the top, try to cover the ones which you don't know at all. Pick up a Sunday/holiday, sit for 10-12 hours and complete it. First read theory(class notes/NCERT/any standard book, go to Books post if you don't know about it). Then start with some easy questions(exercise 1 of coaching sheet or any good question bank). Slowly advance to the more tough questions. Try to decide topics of class 11 which you'll improve on a weekly basis. Like I'll revise chemical and ionic equilibrium this week, etc. If you follow this and work hard enough, I guess 2 months are enough to clear most backlogs. And then follow the rules I mentioned for the students who studied well in class 11. And try to do more tough questions once backlogs are clear.

I hope this will clear confusions. Comment anything which you wish to ask. Follow the blog for regular posts.

All the best!!!

Also check : Best books for JEE , Motivation, A complete JEE preparation guide, Organic Chemistry, Mechanics, Algebra,

Mechanics

Many of you would have started with mechanics by now(class 11 people I mean). New nightmare right? (:p) But trust me, this is an area which is hated by many by the time it starts and is loved by the time your course is about to get over. However, JEE has got a reputation for asking some really mind-boggling questions from Mechanics. But don't worry, I am here to guide you through a step by step analysis of Mechanics.

It starts with Kinematics. Be clear with Vectors and Basic Math, and you are done. Practice a lot at this stage because you would have an early practice of solving equations fast.

So, the next chapter is NLM. It might be seeming very tough to you, but don't worry, by the end of your course you would be really comfortable with it. Practice a lot of questions. I can't emphasize it more. Be thorough with concepts like friction, strings, and pulleys, Normal force, Circular Motion, etc. Practice till you are perfect.

Then comes Work, Power Energy, and Gravitation. Practice conservation of Energy a lot. It is very important in Physics. Gravitation is linked to this. Again, look out for Energy conservation and Kepler's law when solving Gravitation questions. Work-Energy Theorem is another important concept. Make yourself comfortable with the topic.

Coming to Centre of Mass, and Momentum. One of the toughest chapters after Rotation. Tough nut to crack. Step one could be trying to remember all concepts and equations. It helps a lot. Be thorough with vectors. Momentum conservation relies a lot on it. Collisions has some interesting problems. Be thorough with the main formulae. Conservation of Momentum and Energy are central here. Remember positions of COM of various objects. It will be very helpful in future. Remember some basic cases in collisions(small object, heavy object, same masses, etc.) Spring questions are common. Be aware of springs in parallel/series, and basic equations.

Rotation is a real tough nut, and JEE asks some really awesome questions from this section. This is tough and has got a good weightage. You must give a good amount of time to it. It begins with Moment of Inertia. Learn the MI of various standards objects, and be thorough with the derivations. It will help you in case some questions based on calculating MI comes in JEE. Then there is a discussion of angular velocity, rotational Kinematics, etc. Pretty easy if thorough with basic trigonometry and Kinematics. Then comes torque, angular momentum, etc. This seems tough, but it will come naturally to you with time if you are clear with NLM. Remember there are only few equation, T=I(alpha), and L=Iw. Try to remember these using a correlation with NLM. Conservation of Angular momentum is very important. Lots of questions are asked from this topic. Be clear with the axis of rotation and the point about which you are trying to conserve it. Massive problem solving will help.

Then comes SHM. Another basic and important topic. Remember the derivation and equations of SHM. Remember the Time Period formulae. It will save a lot of time on the final day. Questions involving finding the Time Period of any mechanical system are common. Be thorough with them.

Fluid Dynamics and Elasticity- Not very important but few easy questions come for sure. You don't wanna miss them. Continuity equation, variation of pressure with depth, and Bernoulli equation are important. Try to do some questions of Surface Tension too(JEE has asked some really tough questions from this topics). Elasticity has a graph of Stress vs Strain. Remember it well. These chapters have a bunch of long equations. Try to remember them. There might be a few questions at least in JEE(Main) where you would need to evaluate the expression.

So, this was the chapter Synopsis. Coming to the preparation strategy, first of all listen to your coaching lecture/online lecture and do homework, and discuss in class if you are in a coaching. This will help you clear Mechanics.

Coming to books(and hence the self-study guys too) HCV is the god-book for Mechanics. Read every line(irrespective of whether you are in a coaching or not), understand everything and solve each question. Solutions are available somewhere on the Internet I guess(don't know if they are copyrighted or something, so beware). Discuss with teachers. If you sincerely solve all questions of Mechanics then no one can stop you from being a Master of Mechanics. I also recommend reading NCERT. It gives a wonderful insight into the subject and will prepare you for JEE(Main) and Boards too. If you need more objective practice, go for DC Pandey Problems book. Deb Mukherjee's book is really good for conceptual questions. And then comes the GOD- I.E. Irodov. This will prepare you for Olympiads, and for facing any question in JEE(Advanced). Solve this only if you have time and are done with the above stuff. Better do it during Holidays. But trust me, Irodov will give you an upper edge if you are aiming for a top 100 rank or so.

You can buy the books at a cheap rate from these links -

1. HC Verma                                             
2. DC Pandey Problems book
3. DCP Mechanics Part 1
4. DCP Mechanics Part 2
5. Irodov
               
    


This was Mechanics. I'll cover more things with time. Feel free to comment any doubt/suggestions.

All the best!!!

P.S.- Guys, do follow the blog(using the option of the left) for regular updates. I'll be adding a lot of information in my summer vacations.

Also see: Best books for JEE , Electromagnetism,Motivation, A complete JEE preparation guide, Organic Chemistry, Algebra,