IOQs Discussion

This discussion is mainly for the NSEs, including NSEP, NSEC, NSEJS, NSEB, NSEA held in India. However, anyone who wants to practice good Science questions, you are welcome! Edit : IOQ instead of NSE. The rules are:

Post problems related to Science
Don't post repeated problems(I mean if someone has posted it already, don't post again).
Past year problems are also welcome.
Don't post comments not related to any problem.
Don't write the answers in the comments.
If you are not posting a problem yourself, and find a good problem in the Community(old or new), please post it here.
If you learnt any new concept, do share it with us!
I request everyone to please share the links of the previous deleted discussion.
Let's together learn Science!

Easy Math Editor

This discussion board is a place to discuss our Daily Challenges and the math and science related to those challenges. Explanations are more than just a solution — they should explain the steps and thinking strategies that you used to obtain the solution. Comments should further the discussion of math and science.

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Use the emojis to react to an explanation, whether you're congratulating a job well done , or just really confused .
Ask specific questions about the challenge or the steps in somebody's explanation. Well-posed questions can add a lot to the discussion, but posting "I don't understand!" doesn't help anyone.
Try to contribute something new to the discussion, whether it is an extension, generalization or other idea related to the challenge.
Stay on topic — we're all here to learn more about math and science, not to hear about your favorite get-rich-quick scheme or current world events.

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Remember to wrap math in `$` ... `$` or `\[` ... `\]` to ensure proper formatting.
`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
`\sqrt{2}`	$\sqrt{2}$
`\sum_{i=1}^3`	$\sum_{i=1}^3$
`\sin \theta`	$\sin \theta$
`\boxed{123}`	$\boxed{123}$

Comments

(Posting my comment again)

@Vinayak Srivastava here is a special folder link for you, and anybody who wants it. I have added some books which are interesting and explain the concepts very well along with some problem-solving tricks. It contains Physics, Maths and Chemistry books. I have a lot more books, let me know if you want. Others can find it useful too, I have added some of my university books also

Siddharth Chakravarty - 10 months ago

What? 1.9 GB in zip? How do I convert it? lol

Vinayak Srivastava - 10 months ago

Download the zip, and then you will see the folders in the zip. You can use apps like WinRAR to extract it.

Siddharth Chakravarty - 10 months ago

@Siddharth Chakravarty – Ok, then I'll download tomorrow, I don't have that much net today.

Vinayak Srivastava - 10 months ago

@Vinayak Srivastava – In google drive, you might see some third-party app to just see what's inside the zip, for now.

Siddharth Chakravarty - 10 months ago

@Siddharth Chakravarty – I tried, its not working, I'll see tomorrow, thanks!

Vinayak Srivastava - 10 months ago

@Vinayak Srivastava – No worries either :)

Siddharth Chakravarty - 10 months ago

@Siddharth Chakravarty, while opening the link, my name appears in the folder name, even though the folder is yours. Have you only named it like that, or it happens with everyone? I am using Drive for first time, so I am asking, as I want to know more about Drive. Also, can you tell which software I can use to extract as a zip and download? And If you have named it mine, please remove it, I am not the author of the books, and I haven't worked as hard as you to collect the books, as I don't like seeing my name in something I haven't done, you should write your name instead, as you have done the $F \cdot S$ . $\begin{aligned} &~~~\LARGE{\cdot \cdot} \\ &\Huge{\smile} \\ \end{aligned}$

Vinayak Srivastava - 9 months, 2 weeks ago

Lol.The name appears on my side also .extract with zip

SRIJAN Singh - 9 months, 2 weeks ago

No, I named the drive after your name because I have many folders like that, so I put the name of the person for whom I had curated the folder for, just to remember while searching up. I had to also put up your middle name because there are already 2 Vinayak Srivastava's in my previous folders. You can download just by pressing the download button there in Google drive itself, and to extract files you can search Winrar on the web, download it and use it to extract the zip file.

Siddharth Chakravarty - 9 months, 2 weeks ago

@Siddharth Chakravarty – I don't like seeing my name in things I haven't done, please name it "Brilliant books" or something like that, I request you. Also, how do you know my middle name?

Vinayak Srivastava - 9 months, 2 weeks ago

@Vinayak Srivastava – Ok I will change the name, once I get access to my laptop.

Siddharth Chakravarty - 9 months, 2 weeks ago

@Siddharth Chakravarty – I got to know your last name, because when you had joined the Hangout group it had shown your middle name .

Siddharth Chakravarty - 9 months, 2 weeks ago

@Siddharth Chakravarty – The extracting works, thanks for that! It downloads directly also, I see now, but it takes more data.

Vinayak Srivastava - 9 months, 2 weeks ago

@Vinayak Srivastava – @Vinayak Srivastava,@Siddharth Chakravarty..As i open the folder and if I click on book section it isn't opening ..if vinayak has the same problem ...so make a solution for this.

SRIJAN Singh - 9 months, 2 weeks ago

@Srijan Singh – But @Vinayak Srivastava said he downloaded the books, and plus I also don't face any problems. Maybe you are having some problem, explain what is going wrong while opening so I can understand and suggest what to do.

Siddharth Chakravarty - 9 months, 2 weeks ago

@Siddharth Chakravarty – No worries it's opening now .There was some of the servers down from google

SRIJAN Singh - 9 months, 2 weeks ago

These lecture may be helpful in physics :

Classical mechanics

Electricity and magnetism

Sahar Bano - 10 months ago

@Siddharth Chakravarty. how much megabytes does (special folder link) is?

SRIJAN Singh - 10 months ago

A little less than 2000 mb

Siddharth Chakravarty - 10 months ago

Hey, I wasted full 1.2 GB, and it stopped downloading in between. Please make smaller folders, I request you. :(

Vinayak Srivastava - 10 months ago

@Vinayak Srivastava – yeah ! at 1.76 GB my internet interepted @Siddharth Chakravarty

SRIJAN Singh - 10 months ago

@Srijan Singh – Ok @Vinayak Srivastava and @SRIJAN Singh I will make different folders and upload

Siddharth Chakravarty - 10 months ago

@Siddharth Chakravarty – When

SRIJAN Singh - 10 months ago

@Srijan Singh – I am working on it, I will let you all know.

Siddharth Chakravarty - 10 months ago

@Siddharth Chakravarty – Can i download thr fist one

SRIJAN Singh - 10 months ago

@Siddharth Chakravarty.hey what have you inserted in (special folder link) ? and give some more books of maths and science

SRIJAN Singh - 10 months ago

do this @Vinayak Srivastava,@Kumudesh Ghosh,@Siddharth Chakravarty

SRIJAN Singh - 10 months ago

@Vinayak Srivastava @SRIJAN Singh Check the link now, I have uploaded separate files in the folder 'Books'.

Siddharth Chakravarty - 10 months ago

Thank you! I will download a few today, I see there is a very big collection of books!

Vinayak Srivastava - 10 months ago

nice @Siddharth Chakravarty.Thanks for your support towards young one's

SRIJAN Singh - 10 months ago

@Vinayak Srivastava.hey have you understood the high level science or mathematics

SRIJAN Singh - 10 months ago

?? Means?

Vinayak Srivastava - 10 months ago

means have you read something in science and mathematics (special folder link) and understood

SRIJAN Singh - 10 months ago

@Srijan Singh – No, I haven't read anything, I'll see to in in a few days when my school exams are done.

Vinayak Srivastava - 10 months ago

@Vinayak Srivastava – It is effective bro I am reading that only (now)

SRIJAN Singh - 10 months ago

@Srijan Singh – hey Tell me something about Neeraj(Oi doug)

SRIJAN Singh - 10 months ago

Try this problem Graphical Mechanics

Aryan Sanghi - 10 months ago

@Vinayak Srivastava,@Siddharth Chakravarty,@Aryan Sanghi,@Pi Han Goh.try this

SRIJAN Singh - 10 months ago

I have a 30GB folder on stuff like this for science, math and more. How do I send it to you though @Vinayak Srivastava???

A Former Brilliant Member - 10 months ago

can you share to me

SRIJAN Singh - 10 months ago

How? Where should I upload?

A Former Brilliant Member - 10 months ago

@A Former Brilliant Member – Bro you have drive ?

SRIJAN Singh - 10 months ago

@Srijan Singh – No I don't have a car LOL yes I have drive, but I can't send to some person I don't know from Google Drive :)

A Former Brilliant Member - 10 months ago

@A Former Brilliant Member – have you store all the books in drive?

SRIJAN Singh - 10 months ago

Are you looking for this? Maybe this? This might help you. How about this?

Click this mention, because it is a secret link that will help you -> @Vinayak Srivastava

A Former Brilliant Member - 10 months ago

@Vinayak Srivastava - NSE stuff links :)

A Former Brilliant Member - 10 months ago

@Percy Jackson.do you have some books that are effective for nse's

SRIJAN Singh - 10 months ago

@Srijan Singh – I'm not much of a book guy. And NSE's are Indian competitions bro.

PS - Today is August 18th, a very special day. Google if you want. @SRIJAN Singh

A Former Brilliant Member - 10 months ago

@A Former Brilliant Member – why,which day is today

SRIJAN Singh - 10 months ago

@Srijan Singh – Google the relation between today and Percy Jackson :)

A Former Brilliant Member - 10 months ago

@A Former Brilliant Member – yes, books bore me also, I like questions.

Vinayak Srivastava - 10 months ago

@Vinayak Srivastava – Same (some text)

A Former Brilliant Member - 10 months ago

no,@Vinayak Srivastava wants book

SRIJAN Singh - 10 months ago

He never specified that, but lmgtfy :)

Actually, @Vinayak Srivastava can find atleast a million things like this on Google, so he can Google it himself, so lmgtfy doesn't work here :)

A Former Brilliant Member - 10 months ago

No, I need questions. Others may need books, some may need these websites.

Vinayak Srivastava - 10 months ago

@Vinayak Srivastava – Uhh.....don't the papers have questions @Vinayak Srivastava ?

thinking to myself : do they?

A Former Brilliant Member - 10 months ago

@A Former Brilliant Member – Yes, but they are Previous Year Questions, I want original ones. I will solve PYQs in the end.

Vinayak Srivastava - 10 months ago

@Vinayak Srivastava – bro ,if you will not have books then how will you do questions

SRIJAN Singh - 10 months ago

@Srijan Singh – I admire that book take a long time to read

SRIJAN Singh - 10 months ago

@Srijan Singh – I have books already, I don't want more. @Siddharth Chakravarty has also given a lot of books, it will take me many years to read them lol

Vinayak Srivastava - 10 months ago

@Vinayak Srivastava – Ok (some text)

A Former Brilliant Member - 10 months ago

Try this problem Graphical Mechanics!! (Part 2)

Aryan Sanghi - 10 months ago

Try this problem Graphical Mechanics (part 3)

Aryan Sanghi - 9 months, 4 weeks ago

No, we thought we would think about it together :( Maybe Pt.4

Siddharth Chakravarty - 9 months, 4 weeks ago

Ohk. We'll think of part 4 together. :)

Aryan Sanghi - 9 months, 4 weeks ago

@Aryan Sanghi – Btw, check I posted the problem I gave to you Link

Siddharth Chakravarty - 9 months, 4 weeks ago

@Siddharth Chakravarty – I solved it......

Aryan Sanghi - 9 months, 4 weeks ago

@Aryan Sanghi – Please post a solution then :)

Siddharth Chakravarty - 9 months, 4 weeks ago

@Siddharth Chakravarty – Ohk...... I'll post it tomorrow....... Going to sleep. :)

Aryan Sanghi - 9 months, 4 weeks ago

Try this problem instead Graphical Mechanics (part 4)

Aryan Sanghi - 9 months, 2 weeks ago

Try this Vectors Basics problem

Vinayak Srivastava - 9 months, 2 weeks ago

New problem: A constrained pulley!

Vinayak Srivastava - 9 months, 2 weeks ago

Try this problem Moving Wedge

Aryan Sanghi - 9 months, 2 weeks ago

Please see this problem and please post a solution : May the Potential Energy be with you!

Vinayak Srivastava - 9 months, 1 week ago

This might help

Zakir Husain - 9 months, 1 week ago

Great thank to @Zakir Husain for giving his support towards the young wonders including me

SRIJAN Singh - 9 months, 1 week ago

@Vinayak Srivastava,you might like this

A Former Brilliant Member - 9 months, 1 week ago

Nice, but easy. Pure logic is enough to solve it. Though I must point out @Kriti Kamal, that leaves are not exactly green, rather they appear green due to the green pigment chlorophyll present in the chloroplasts. This is because leaves can be other colors as well. These kind of leaves just have chlorophyll in minority compared to the other colored pigments. Though this doesn't change the answer.

A Former Brilliant Member - 9 months, 1 week ago

if it does not changes the answer,then i will not argue with you。

A Former Brilliant Member - 9 months, 1 week ago

@A Former Brilliant Member – It doesn't change the answer, but it deems your solution to be partially wrong. This is not an argument. Stating facts that are only partially right is a flaw in the solution, so your solution is imperfect, but you can change it, if you wish to, which in my opinion you should, but then again, that's my opinion. @Kriti Kamal

A Former Brilliant Member - 9 months, 1 week ago

@A Former Brilliant Member – Thanks for your advice.

A Former Brilliant Member - 9 months, 1 week ago

@A Former Brilliant Member – No problem :)

A Former Brilliant Member - 9 months, 1 week ago

commisconception

A Former Brilliant Member - 9 months, 1 week ago

@Percy Jackson,@Vinayak Srivastava

Try this

A Former Brilliant Member - 9 months, 1 week ago

Important Announcements

Zakir Husain - 9 months ago

Thanks you sir for awaring this to all.

SRIJAN Singh - 9 months ago

You mean - "Thanks sir, for bringing this to our notice" or "Thank you sir, for sharing this with us". Bad grammar is the reason most fail their English exams @SRIJAN Singh, but not me, I have a Business English degree :)

A Former Brilliant Member - 9 months ago

@A Former Brilliant Member – Thanks for teached of English grammer, I hope that these will turned out to be very usedful to ours, because I has pretty weak on the English subject. LOL, I realised now how long does it take to write something incorrect.

Siddharth Chakravarty - 9 months ago

@Siddharth Chakravarty – LOL its super-hard to get something incorrect if you know how it is correct. Used to typing the correct words I guess lol

A Former Brilliant Member - 9 months ago

@A Former Brilliant Member – I was in hurry,little bit weak in english btw the notice is non of @Percy Jackson business because it is for Indian exams

SRIJAN Singh - 9 months ago

@Srijan Singh – Ya I know bud, but as a person with a Business English degree I'm supposed to correct others English to annoy them :)

A Former Brilliant Member - 9 months ago

@A Former Brilliant Member – Yup! Percy Jackson

SRIJAN Singh - 9 months ago

Important Announcements

Zakir Husain - 9 months ago

you may try this

Lakshya Khilwani - 8 months, 3 weeks ago

New problem

A Former Brilliant Member - 8 months ago

@Vinayak Srivastava,Have you tried the problem?

A Former Brilliant Member - 7 months, 4 weeks ago

Try this problem by me Bouncy Bouncing Balls!!

Aryan Sanghi - 7 months, 3 weeks ago

Try this problem by me Edge Case Of Rolling!!

Aryan Sanghi - 7 months, 1 week ago

All the best to everyone giving IOQM and/or IOQJS tomorrow!

Vinayak Srivastava - 5 months ago

Ya thanks!!!!!!

SRIJAN Singh - 5 months ago

I also have 1 doubt in Vertical Circular Motion. Any help will be highly appreciated.

If in a vertical circle, the velocity at lowest point is $\sqrt{2gR}$ [ $R$ is radius of circle] then after reaching the horizontal point, what will happen to the particle? Will it continue in the semi-circular arc, will it fall freely in straight line, or fall like a projectile?

Vinayak Srivastava - 5 months ago

Look the velocity at any height h from the lowest point is $\sqrt{u^{2}-2gh}$ where u is the velocity at the lowest point. So at the horizontal point, it is at a height h=R from the lowest point and the initial velocity is $\sqrt{2gR}$ as per you, so the velocity at the horizontal point should come out to be 0, which means the particle is at rest there but still gravity would act on it, and it will again fall down, and then go on the opposite side, come back down, and so on, and thus the system becomes a pendulum.

Siddharth Chakravarty - 5 months ago

Oh, I didn't see your reply. Sorry. Thanks for the answer!

Vinayak Srivastava - 4 months, 1 week ago

All the best to everyone giving the Senior IOQs!

Vinayak Srivastava - 4 months, 1 week ago

Hey @Vinayak Srivastava, I did not give IOQM this time because of my jee prep., is it better to give it in class 12, or should I leave it??

Dibyojyoti Bhattacharjee - 4 months, 1 week ago

Hey! I don't think I am the best person to answer this, I think you should ask others more experienced and then decide. Sorry. I am mentioning few people whose opinion may help you: @Zakir Husain, @Aryan Sanghi, @Siddharth Chakravarty, @Mahdi Raza

Vinayak Srivastava - 4 months, 1 week ago

@Vinayak Srivastava – I am myself busy with the JEE and SAT prep 😅

Siddharth Chakravarty - 4 months, 1 week ago

@Siddharth Chakravarty – What is your SAT date? 13 March?

Mahdi Raza - 4 months, 1 week ago

In my opinion, it's always a good idea to give any exam. No matter what the result is, or how much you were prepared for, it will give you a unique experience and teach you something. Now if someone is not at all interested in Biology or Physics, then it is obviously a futile thought to give or even prepare for its respective exam. But if you are really interested in mathematics, then sure, go ahead. I would! For preparation, decide your priorities first. Is JEE prep more important or PRMO? it's most probably JEE that's important. Then preparing for PRMO rigorously is not a good idea. You can still search for problems occasionally or solve some problems every night. Anyways, I would suggest you give the exam! Hope this helps.

Mahdi Raza - 4 months, 1 week ago

@Dibyojyoti Bhattacharjee You are eligible for it until Your age $\leq 19years$

Zakir Husain - 4 months, 1 week ago

Hi. IOQM is suitable to give only till class 11th, as it's syllabus is quite different from JEE syllabus and so you have to divert your attention to IOQM which might be bad for JEE. Also, I feel it's never worthy to give exams without preparation as it becomes quite a demotivation if we don't do good, which is bad at a crucial time of JEE. So, in my opinion, I think you might leave it. :)

Aryan Sanghi - 4 months, 1 week ago

But, if you have never appeared in IOQM/PRMO, then I'll say it's a worthy experience to give and prepare for it. But if you want to give, don't do too much preparation as it will affect JEE and also don't do zero preparation as demotivation is quite bad. I have experienced demotivation in 9th. :)

Aryan Sanghi - 4 months, 1 week ago

$\Large{Result\space of\space IOQJS}$

Zakir Husain - 3 months, 4 weeks ago

NSEJS Qualified list

Vinayak Srivastava - 3 months, 3 weeks ago

LOL I qualified from UP with only 48 marks, but I will get 0 in INJSO anyway. :)

Vinayak Srivastava - 3 months, 3 weeks ago

NSEP, NSEC, NSEA, NSEB Scores

Vinayak Srivastava - 3 months, 1 week ago

$\textbf{Result links}$

Vinayak Srivastava - 2 months, 4 weeks ago

Did you qualified or not?

SRIJAN Singh - 2 months, 4 weeks ago

Yeah, I qualified IOQJS First Part, i.e. NSEJS, but it is because of my state cutoff, I got only 48 marks.

Vinayak Srivastava - 2 months, 4 weeks ago

Can anyone please share the syllabus of NSEJS?? Probably @Vinayak Srivastava @Siddharth Chakravarty

SRIJAN Singh - 1 month, 3 weeks ago

I think since you are in a coaching, you should follow what your coaching says. I don't think I am eligible to give any tips for the exam, as I qualified because of two reasons:

Being from UP, where the cutoff is MAS
Only 10k people gave the exam instead of the usual 40k-50k

Vinayak Srivastava - 1 month, 3 weeks ago

gotchaaa. Well, I am in coaching but I tried googling the syllabus and I found the syllabus from this resource and is that right syllabus? Could you even tell me what to prepare from where should I learn?

SRIJAN Singh - 1 month, 3 weeks ago

@Srijan Singh – It seems a bit less to me in Physics. I can't say for Chem and Bio as I studied only Maths and Physics(leaving Magnetism chapter) syllabus. I think the website has just seen the previous year questions and made a list of all topics from there. I can tell you what I had studied for Physics and Maths, I am not sure if it is whole syllabus:

Physics: Kinematics, NLM, Circular Motion, Work, Energy, Power, SHM, Waves, Sound, Gravitation, Electricity,(Magnetism), Light, Fluids, Heat. Maths: I think the syllabus given there is complete, just add co-ordinate geometry, sometimes they ask 1-2 questions from it. Other than that, you can use Brilliant for practice.

I am not saying this is complete in any sort, but it can give an idea.

I don't know what happens in coaching since I am not in one, but if they are not teaching you, you can watch videos from YouTube and then solve any coaching books for that chapter. I purchased Resonance books, but the Chem and Bio are still left to be opened lol.

Vinayak Srivastava - 1 month, 3 weeks ago

@Vinayak Srivastava – Huge thanks for writing it. Well, reading NCERT class 11th & 12th, basics from what Siddharth Chakravarty books and HCVERMA and some past papers is enough for Physics?

I will try learning biology from NCERT class 11th & 12th books has and from CAMPBELL 11th edition is that enough?

Could you tell me what to do with chemistry, well I am covering it with Ebbing Gammon Chemistry!

SRIJAN Singh - 1 month, 3 weeks ago

@Srijan Singh – I think you are doing more than enough for Physics, I don't know about Bio and Chem, because I did not even read 9th and 10th NCERTs, but it seems good enough. I would suggest you to do whatever you have decided, don't ask a lot of people whether it is enough or not, you should instead refer to the Previous Year Papers for knowing that. All the best!

Vinayak Srivastava - 1 month, 3 weeks ago

@Vinayak Srivastava – Mhm Seems Good

Thanks!

SRIJAN Singh - 1 month, 3 weeks ago

Math	Appears as
Remember to wrap math in `\(` ... `\)` or `\[` ... `\]` to ensure proper formatting.
`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
`\sqrt{2}`	$\sqrt{2}$
`\sum_{i=1}^3`	$\sum_{i=1}^3$
`\sin \theta`	$\sin \theta$
`\boxed{123}`	$\boxed{123}$