Wednesday, 26 February 2014

Thermal Physics... Hot topic in JEE

The topic mentioned in the heading is just too damn heavy for JEE - Yes, heavy in terms of it's weightage in JEE.
To get a feel of how important it is, pick up the past year JEE papers. Each JEE paper contains at least 5-10 problems from thermal physics. So better prepare it well.

Basics : This include the topics of thermal expansion, thermal stress etc. They are simple topics and must be done if you have solved a few standard problems. The problems of expansion involving liquids inside a container are important and easy. You may be asked to measure the new length measured by the scale when scale and the object(whose length is to be measured), both expand. Such problems are easy and interesting and must be done in a single shot.

Heat Transfer : Slightly important topic. I remember there was a question regarding calculation of equivalent thermal conductivity in JEE 2013. Although JEE mentions heat conduction in one dimension, you still may try heat conduction through a cylinder (2 dimensions) and heat conduction through a sphere (3 dimensions) for Olympiads. Laws of radiation and Newton's laws of cooling are important. You should learn the definitions of emissivity/emmisive power/absorptivity/etc by heart. I remember I used to mix these definitions. Pick up HC Verma and learn the definitions in that book. Kirchoff's law, Wein's displacement law, Stefan's law etc are important and easy to grasp topics.

Thermodynamics : Here comes the big gun. This topic is extremely important because having a grip on this will help you not only in physics but also in chemistry. Learn the specific heat capacities of various gases at constant pressure and constant volume. They won't be given in exam. Learn the definitions of various processes, most important one being isotropic process. Solve a large number of problems from thermodynamics of ideal gas. A word of caution here. Make sure that you don't mix up the physics and chemistry conventions of First law of thermodynamics. They take work done as negative in chemistry but not in physics.

Books : HC Verma, Arihant. These two books are more than enough.


Revision : Revision packages like FIITJEE GMP, resonance Rank booster or the one provided by your coaching.

Final word Practice a number of problems from the First law of thermodynamics. It's really really important from the point of JEE. Also, it is important from the point of Indian National Physics Olympiad. I remember having a 13 mark question in INPhO 2013 from a combination of SHM and Adiabatic process. So better learn the formulas of Work done, Heat and change in internal energy in all the processes.
Cheers

48 comments:

  1. Please write about error analysis/general physics and electromagnetics.

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    Replies
    1. Please mention your suggestions in the "Blog feedback/suggestions post"

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  2. Uum....i have the 2012-13 version of FIITJEE ARCHIVE....i will write JEE in 2015....so will that version+2013,2014 JEE papers suffice?

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  3. Hi bhaiya! I've sent a mail timed 21:42, 25th Feb regarding a few queries, if you could clear them away. Thanks..!

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    1. well I don't like email. Better post it here unless its absolutely necessary.

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    2. Well...I think it's absolutely necessary. Still, OK. The eBook for Maths material from Bansal Classes wasn't opening ; I've tried many times.
      2. Theory-wise, is Class 11 and Class 12 NCERT are sufficient w.r.t. Physics & Chemistry for JEE (Main) and What wud be the ideal source for revision thru solving problems to really have good speed and better prep 4 Main ? Cause I've only 2 Weeks for it after Boards. I am really concerned regarding the required speed as I feel Attempting even 75 - 80 QUES. out of 90 is Tough !!
      3. Can u please tell me from where can I get IIT-B's PLANCESS Notebook+ (their latest feature), as even AIR - 1 Prudhvi Teja bhaiya had acclaimed it in a video?? I really like its feature of "A Formula at Footer of Its Every Page" & want it 'desperately' !

      Thanks for your help and time....!!!!

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    3. For the ebook, please try to re-download it. I didn't receive any other complaints.
      For practice, there are a number of revision packages available in the market. You can buy any of them.
      Make sure that you have covered NCERT completely. It's extremely important from the point of JEE main.
      Keep calm and prepare well.
      For that plancess material : I really don't know

      Delete
  4. Hey,
    How would rate the Thermodynamics part from I E Irodov wrt JEE adv ?

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    1. It's awesome. It contains some brilliant questions on thermodynamics of an ideal gas.
      PS : Irodov is the best book for "ALL" Jee chapters. The point is that you will have to stick to syllabus otherwise you will end up wasting time. However, if you want to go beyond the limits of syllabus (olympiads), then go ahead - most toppers do it (after ensuring that things mentioned in syllabus have been completed perfectly)

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  5. Hi Aman, you have mentioned in almost all comments regarding Irodov that stick to syllabus, but since I don't have a good teacher to guide me through, how will I come to know which problems are in syllabus since I don't think I will myself be able to identify them as I will be doing it for the first time.

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    Replies
    1. Refer JEE advanced syllabus as given in JEE website

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  6. This comment has been removed by the author.

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  7. Hi Aman,
    I am class 12 student and am writing my board exams now. Even though I joined coaching class, I didn't study properly. So I am very weak in problem solving. But I understand theory very well.how can I improve on problem solving. Should I keep looking at solutions and writing it down, Coz I dont have any idea.Can you plz help me?

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    Replies
    1. I really don't know how to help you. JEE is on the head. This is something that is not expected from a true JEE aspirant.
      Sorry, I don't know how to help.
      One last suggestion. Post your problem on Quora. There are other experts there who will probably help you. The more opinions you get - the better

      Delete
  8. This comment has been removed by the author.

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  9. Can you tell me how to study? Like how to approach problems, etc . because I can easily learn a lot in short time.I will try my best. I just need a little help, thats all.
    How did you study.?
    Please help me

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    Replies
    1. "How to approach problems ? " : A JEE aspirant gets the answer to this question in his/her 2 years of JEE preparation.
      How did I study ? - read the blog.

      Delete
  10. Hey Aman....is this a good way:doing 1-1.5hr serious study.....take a break of 5-10min break n listen 1 or 2 songs....n again sit for another 1.5hr...n repeat this way....??or should i do 3-4 hours serious study in one go?

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    Replies
    1. depends on many factors which include : load/mood/etc

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  11. Hi aman...
    How much should I score in the AITS of a reputed institute like resonance to secure a rank of under 200 in jee?
    What I mean to ask is that generally how much difference is there between cumulative %age of aits and JEE?

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    Replies
    1. For under 200 rank, you percentile should be above 99% (at least)

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    2. Yeah but suppose I score 65% on average in AITS, how much will I score on "the day"? Will it be less than that? If so, by how much percent(meaning 63 or 60 instead of 65% types)?

      Delete
  12. Hi! Can you please answer this question: https://www.quora.com/How-do-I-remember-trivial-things-please-see-the-details? You may answer it here itself, if you wish.

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  13. sir is hc verma sufficient,or is it necessary to solve arihant

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    Replies
    1. Please do not call me sir.
      You can call me Aman (I am just 1 year older than you)
      HC Verma is not sufficient if you are aiming for a 2 digit rank

      Delete
  14. besides i have solved gmp and review packages and past year jee problems will it suffice bcoz i n giving jee 2014

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  15. Hey buddy.....let me explain a problem I'm facing....apart from standard textbooks....i have the dlp of BT....+study material of a local tutorial(where I'm undergoing JEE preparation)....let me consider the case of maths...i have Arihant(entire series)+BT+Bansal DPP+local tutorial's Sheets....so I'm pretty confused....my questions are(they apply for Physics & Chemistry as well)
    1)do i need to do all these materials?If yes .....please mention the sequence.....
    2)If no is the answer to question 1...please tell which is to be used as base...then for Level-2 problems....then L-3 and so on....?

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    Replies
    1. please take these minor decisions yourself.
      I have already told what "I" used. I can't tell you what "you" should use.

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  16. There is an advise that whenever you recommend a book to us please give a flipkart link or a cover pic of the book like u did this time.Also divide the book in two parts the first part where you did the theory and the second for practice
    Also if I do theory from resnick halliday and practice from HCV and DC Pandey then will it suffice

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    Replies
    1. sure.
      But this could have been mentioned in "blog feedback/suggestions" post.
      Yeah your plan for physics is good.
      But do keep a track of syllabus when you read halliday

      Delete
  17. Are latent heats and specific heats given in the question paper?

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  18. Hi aman, I love ur blog and also try to follow ur imp advice.

    BESIDE this u mention in intro of blog u r now involve in speeding a bit do u break WR OF feliks zemdegs ( 5.66s)

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  19. what is google internship?how can i join it?

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  20. i am iit jee aspirent. i have scored 60% in fittjee aits.so am i get rank 2000 in iit jee?for sure

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  21. Sir can you please give me the link of resnick halliday which you used as there are many in the market

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  22. sir realy need ur help.. actually in jee mains this year I ticked 30 maths questions blindly ..and 11 of them were correct whixh means. 44 marks and. 19 were deducted ..out of them ..
    but my friends were telling that if the had ticked more number of negative marks question..
    my rank would go down even if the score high in marks ..
    is it true ..
    my jeemains paper was of b.arch .. kindly help.. me.
    I am getting mad now..

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  23. Hi aman bhaiya.......
    For achieving a three digit rank...are HC Verma, NCERT and irodov exclusively for mechanics and thermal physics enough????
    I am a JEE 2017 aspirant........

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    Replies
    1. Yes they are enough if you solve them properly

      Delete
  24. Hello Aman bhaiya...i am Ritam a class 11 student..i want to prepare myself for NSEP...can u suggest something? Reply plzz

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  25. where can i get free and good quality lectures on physics and chemistry if i decide to prepare from home itself

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  26. Hii sir can tell me the correct name of
    Book (arihant) that you used while JEE?

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  27. This comment has been removed by the author.

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  28. How much rank is required to be secured in resonance AITS for getting around 1000 to 2000 rank in jee advanced

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  29. is Resnick Halliday good for jee advanced

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