# FIITJEE (chat room )

Guy's This is the continuation of our chat room that we started on slack!

Note by Aniket Sanghi
3 years, 4 months ago

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.

When posting on Brilliant:

• 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.

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Note: you must add a full line of space before and after lists for them to show up correctly
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MathAppears 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} $\boxed{123}$

Sort by:

Why do we not talk on slack now?

- 3 years, 4 months ago

My slack app doesn't work. I deleted it .

- 3 years, 4 months ago

Is fitjee aits are best in physics rather than any other test seriez

- 1 year, 8 months ago

- 3 years, 4 months ago

Guys scores in today's Aiits?

- 3 years, 4 months ago

My 183 from this key n I think some ans are wrong. N share your scores

- 3 years, 4 months ago

N @Archit Agrawal How much r u getting in olympiads?

- 3 years, 4 months ago

Answers which i feel are wrong are

Chemistry (graph ones ) should be ABCD

H2O2 One should be bonus density cant be 26.5

OCH3 One about incorrect statements i got ABC To that

Physics

Wedge one where mgcotx is given but mg/tanx is not

integer physics one in which velocity was asked it was turning out to be 16 but i ticked 4

- 3 years, 4 months ago

Phy multiple choice Q6 ans must be only A Maths int Q4 it must be 1

- 3 years, 4 months ago

Yup A Only i didn't do Q4 Of math

- 3 years, 4 months ago

Yeah what's yr score in olympiad ( nsep , nsec, nsea )

- 3 years, 4 months ago

Yep that density one also , I felt that error!!

- 3 years, 4 months ago

If all these keys are corrected then your score @Archit Agrawal?

- 3 years, 4 months ago

201

- 3 years, 4 months ago

My 174 from this key

- 3 years, 4 months ago

My score 175 with this answer key

Answer keys I feel are wrong - [ My SET A]

1. Chem that graph one (ABCD) (+3)
2. That SCl2 (OCH3)2 one (ABC) (+3)
3. That density one density is not acceptable (bonus +3)
4. That electfonegativity one (ABC) (+3)

Maths

1. Maths that cos[pi/x]cos () one 1 (ABC)(as x tends to zero the cos tends to 0 (second cos) ) (+3)
2. Match f (x) = that sin [] that long one . I got discontinuous at 5 points . (+2)
3. Int 1.that f(x) = X sin (quadratic ) one . I got at 5 points (as it was cont. At -1,0,1,2. (+6)
4. Int 8(that f (x) = xln^2x one. Ans 1 (+6)

Physics

1. That mgcotx and mgtanx one (+3)
2. That ring one (BC) (+3)
3. That particle velocity and acc (Only A) (+3)
4. That int of pulleys ans 16 (bonus +4)
5. Ans omega finding one answer 20. (Bonus +4) .

If I consider these all then my score (at max) can be 221.

Your arguments ? Where am I wrong?

- 3 years, 4 months ago

I Agree with all of your chemistry problems i got exactly the same answers as you got Hifi!!!

Math 1st one yeah i too got ABC

Q2 Dont know

Q3 No i think its correct. i got 6 in the exam

Q4 I Too got 1

Physics

I Agree with first 4

But in last i think omega is correct

- 3 years, 4 months ago

And bro math integer 1 function is discontinuous at x = 1 check again!

- 3 years, 4 months ago

Agreed . Did a mistake took that outer x as [x] .Finally cold and cough showed it's effect.

- 3 years, 4 months ago

Bro my cold and cough is also continued. PPM Level in delhi still above the danger mark

- 3 years, 4 months ago

Oh! Sad ! Future of world getting smoggy!

- 3 years, 4 months ago

Check out my set all problems posted by me

- 3 years, 4 months ago

I got value of w as $\sqrt{\dfrac{20\sqrt{3}}{4-\sqrt{3}}}$

Is this exact value correct?

- 3 years, 3 months ago

check this <a href="https://rpfconstableresult2018.in/rpf-constable-application-status-reasons-for-rejections/">rpf constable application status 2018</a>

- 1 year, 6 months ago

How was AITS? @Aniket Sanghi @Archit Agrawal

- 3 years, 3 months ago

Hii guys I am from fiitjee lko

- 3 years, 3 months ago

Hello!.

- 3 years, 3 months ago

Hi Iko?

- 3 years, 3 months ago

How much score u all are getting in aits??

- 3 years, 3 months ago

i did not gave this AITS Due to KVPY Camp at IISER Kolkata

what was your score in AITS-1 Or the recent AIITS-5?

- 3 years, 3 months ago

- 3 years, 3 months ago

Hey guys how much are u all getting in today's aits? @Prakhar Bindal @Aniket Sanghi

- 3 years, 3 months ago

0

- 3 years, 3 months ago

U didnt gave the test?!

- 3 years, 3 months ago

Yup

- 3 years, 3 months ago

Ohk..i m getting 195 :/

- 3 years, 3 months ago

ohh cool

- 3 years, 3 months ago

WBU?

- 3 years, 3 months ago

Guys how was AITS? @Samarth Agarwal @Aniket Sanghi @Rohit Kumar @Anubhav Tyagi

- 3 years, 3 months ago

U appeared for the test?

- 3 years, 3 months ago

Nope :P

- 3 years, 3 months ago

Hey...can u give me ur contact no...pls

- 3 years, 3 months ago

- 3 years, 3 months ago

But i know one person's score . he is a good friend of mine

he is getting 220 in mains and 189 in advance

- 3 years, 3 months ago

anubhav didn't come for advanced. I am getting little less than 140 in advanced. Prashant is getting more than 180 in advanced. Better watch out for him next time.

- 3 years, 3 months ago

Yup cool!

- 3 years, 3 months ago

- 3 years, 3 months ago

Yup Just missed it due to illness

- 3 years, 3 months ago

k so coming today?

- 3 years, 3 months ago

Are you? I am coming

- 3 years, 3 months ago

Aaj to ana he padega party deni hai

- 3 years, 3 months ago

Are bhai ka b'day hai. Happy B'Day bhai

- 3 years, 3 months ago

Abe saale 13th ko tha party aaj dunga

- 3 years, 3 months ago

Are happy belated b'day

- 3 years, 3 months ago

Thank you! :)

- 3 years, 3 months ago

you guys started a new chatroom ?

- 3 years, 3 months ago

Sup?

- 3 years, 3 months ago

Nothing seeing Masterchef india sydney special :P

- 3 years, 3 months ago

So i am not alone who watches masterchef :p

- 3 years, 3 months ago

yup even i thought the same! :P lol

- 3 years, 3 months ago

Good.But I will watch TKSS after 9:30 pm :)

- 3 years, 3 months ago

- 3 years, 3 months ago

- 3 years, 3 months ago

My is very very bad . i messed up my paper with loads of silly errors . whats yours?

- 3 years, 3 months ago

- 3 years, 3 months ago

and do you feel someanswers are wrong?

- 3 years, 3 months ago

Mine score is 158

- 3 years, 3 months ago

ohh cool i have shitted myself with 170

- 3 years, 3 months ago

Anyone else you know?

- 3 years, 3 months ago

nope

- 3 years, 3 months ago

Which answers do you feel are wrong ?

- 3 years, 3 months ago

Many in chem i wasnt able to do chem

- 3 years, 3 months ago

Subject wise score?

- 3 years, 3 months ago

C-47 M-59 P-65

- 3 years, 3 months ago

47 in chem and you were not able to do it?

- 3 years, 3 months ago

Yours?

- 3 years, 3 months ago

C-12 M-70 P-76

- 3 years, 3 months ago

Ohh nice in p and m +1

- 3 years, 3 months ago

You also commited silly errors bro?

- 3 years, 3 months ago

Actually yes + some concepts I need to learn like H2S ones

- 3 years, 3 months ago

yup me too

- 3 years, 3 months ago

and do you feel some answers wrong?

- 3 years, 3 months ago

I do

- 3 years, 3 months ago

What did you did for that q whose answer is not given in phy?

- 3 years, 3 months ago

7 BC Int 4 - 5

- 3 years, 3 months ago

????????

- 3 years, 3 months ago

Sorry bro @Aniket Sanghi Mom called me (you know if i would have not gone then.....)

- 3 years, 3 months ago

i got 1 to integer 4 and 7 i agree BC

In Math matrix 4 last 2 parts seem to be wrong

In chem many seem to be wrong

- 3 years, 3 months ago

I agree i chem as well

- 3 years, 3 months ago

which ones and what is yours and rohit's score?

- 3 years, 3 months ago

I agree with you

- 3 years, 3 months ago

A uniform rod of mass m and length l is hinged about a point and is initially horizontal.Now the rod is released and it can rotate freely about an horizontal axis passing through A.

Find the tension in the midpoint of the rod when it becomes vertical.

My answer is not matching , I am getting 17/8 (mg) .I used integration.

Thanks.

- 3 years, 3 months ago

i am getting $\dfrac{13mg}{8}$.

Used integration.

- 3 years, 3 months ago

Yes, it is 13mg/8.

- 3 years, 3 months ago

I am also getting 17mg/8.

- 3 years, 3 months ago

@Archit Agrawal how much are you getting in AIITS?

- 3 years, 3 months ago

227

- 3 years, 3 months ago

N u?

- 3 years, 3 months ago

i am getting 13mg/8

- 3 years, 3 months ago

those who are getting 17mg/8 would have ignored the weight of half rod while writing equilibrium equations

- 3 years, 3 months ago

Edit:

I made a mistake, now I am getting 9mg/8 ,it seems to be correct since it is given in the option while rest of the answers, 13mg/8 and 17mg/8 are not in option.

- 3 years, 3 months ago

$\dfrac{9mg}{8}$ is the value excluding the weight of the half rod

- 3 years, 3 months ago

Yup indeed!

- 3 years, 3 months ago

What is the meaning of "excluding the wt if half rod"?

- 3 years, 3 months ago

In writing equilibrium equation along the rod for the rod have you taken into account the weight of half rod??

- 3 years, 3 months ago

Tension in midpoint of rod = weight of the one half + centripetal force.

centripetal force comes out to be 9mg/8

- 3 years, 3 months ago

Centripetal force 9mg/8?? havent you taken into account the hinge reaction?

- 3 years, 3 months ago

hinge reaction!?

- 3 years, 3 months ago

Yup there will be some hinge reaction too from the hinge on the rod

- 3 years, 3 months ago

but what it has to do with tension in mid point ?

- 3 years, 3 months ago

seems like we have solved the problem using different approaches

- 3 years, 3 months ago

can you share yours?

- 3 years, 3 months ago

Actually i have to leave now

- 3 years, 3 months ago

Thus tension at topmost point,the point just below the hinge, comes out to be 3mg/2, but it not physically realisable,what say?

- 3 years, 3 months ago

Has the results for NSEP, NSEC, NSEA declared? -@Prakhar Bindal

- 3 years, 3 months ago

nope who told you? it will be out in first week of jan

- 3 years, 3 months ago

See inside question booklet- Its written list of students above having score above MAS will be displayed on 22 dec

- 3 years, 3 months ago

I Know that but scoring above MAS Does not imply you qualify for INO's

- 3 years, 3 months ago

But that information is sufficient bro at least to me as here scores are also displayed and practically 5 students used to get selected from here per exam !!

- 3 years, 3 months ago

Have anyone downloaded the Full test 1 and 2 papers from net on 20th December . I forgot that time and now I am not getting that URL opened .

Help me Guys

- 3 years, 3 months ago

Damn ..i also forgot

- 3 years, 3 months ago

- 3 years, 3 months ago

which full tests?

- 3 years, 3 months ago

Full test 1 and 2 that are to be downloaded from net .

- 3 years, 3 months ago

oohhh..

- 3 years, 3 months ago

http://aiits.fiitjee.com

Check out this link for the papers

- 3 years, 3 months ago

Thanks a lot bro for the links i needed them desperately! :)

- 3 years, 3 months ago

Hey guys how much did you got in AITS Part test 3 advanced?

today i attempted the paper at home at JEE Timings . i got 205/360 in it . what about you?

- 3 years, 3 months ago

227

- 3 years, 3 months ago

Cool so 227 was your score in AIITS?

How Much you got in AIITS Held on monday?

- 3 years, 3 months ago

I was also shaken Bro by hearing 227 in AIITS - 6 !!!!!!

Now , it's okay 227 in AITS is okay!

- 3 years, 3 months ago

same here how much did you socred in AITS 3?

- 3 years, 3 months ago

Bro ! Your score in AIITS 6 ?

- 3 years, 3 months ago

I didn't gave it.

- 3 years, 3 months ago

Oh ! Okay! Never Mind ! ☺

Any Special Reason?

- 3 years, 3 months ago

Yet to attempt bro

- 3 years, 3 months ago

Can non 12th graders get these papers?

- 3 years, 3 months ago

Hey Guys i have got a problem . In my CPP This problem doesnt have answer . can you guys solve and tell me the answer i am getting w = 2

A Particle is at the lowest point of a smooth wire frame in the shape of parabola lying in the vertical x-y plane having equation x^2 =5y (x,y are in meter) . after slight displacement particle is set free. find angular frequency of oscillation

take g = 10

- 3 years, 3 months ago

Will solve it and tell

- 3 years, 3 months ago

I am also getting w as 2.

I used the approximation that for small displacement, tanz=b/a=a/5 where b and a are position coordinates of the particle at some instant and also that for small z,tanz is almost equal to z.

- 3 years, 3 months ago

even i used the same approach

- 3 years, 3 months ago

I am also getting 2...same approach

- 3 years, 3 months ago

By Energy Method , Answer is coming 2 .

Let me also try by Force Method .

- 3 years, 3 months ago

By Force method also , answer is coming 2.

But by Torque method , I dont think the answer will come easily!!!

- 3 years, 3 months ago

Bro! Do you have some good questions which are more easily solved by Energy method than Force method ?

I u have , then share some bro!

And I have got one good q , you may like to solve

- 3 years, 3 months ago

Hey guys which test series will you join apart from fiitjee?

i am preferring allen over resonance what do your guys think?

- 3 years, 2 months ago

I Dont have plans as such now .why do you need other test series?

- 3 years, 2 months ago

- 3 years, 2 months ago

If online tests are okay for you, then: assuming you are in FIITJEE, you must be having access to myPAT - did you try them? Besides there is AIiTS, if you want to give tests comparable to JEE Advanced (unlike AITS!).

Besides, there's Embibe. [A note for Embibe: recently, they have started charging Embiums (virtual currency on Embibe that you can either purchase by real-world cash or earn by solving questions on Embibe) for various services on the site.]

- 3 years, 2 months ago

If you are looking for online tests, then I highly recommend you try out Hashlearn (www.hashlearn.com). They have a large base of quality tutors, all of whom are from premier institutions of India like IIT, and NIT. They also have exclusive tie-ups with top publishers in India so you can practice questions from all their books right on the app and get detailed solutions for all the question. Check them out.

- 2 years ago

Am preferring resonance over allen apart from the fiitjee ones

- 1 year, 2 months ago

http://chemistry.stackexchange.com/questions/27826/why-is-diborane-cleaved-symmetrically-by-trimethylamine-but-unsymmetrically-by-a

this is a jee question does anyone has any idea how this works?

- 3 years, 2 months ago

Haha lol

- 2 years, 1 month ago

i want to know about fees for class9

- 1 year, 10 months ago

200 for unlimited membership

- 1 year, 10 months ago

Lol you even don't know what fiitjee is . Do you?

- 1 year, 9 months ago

Can any body provide me best books for Inpho

- 1 year, 8 months ago

dc pandey,university physics(sears and zeemnasky),hc verma,Resnik halliday

- 1 year, 8 months ago

Nup.

- 1 year, 8 months ago

What is this nup

- 1 year, 8 months ago

You see how impolite she is😐😠😈😡😬

- 1 year, 8 months ago

Your text is irrelevant for me . I can't understand what you are saying

- 1 year, 8 months ago

You see how stupid that guy below is?

- 1 year, 8 months ago

If you are finding online test series for IIT JEE mains exam then you can get sample papers and test series for IIT JEE main preparation. Contact us- https://www.avanti.in/jee-main-online-test-series/

- 1 year, 3 months ago

After reading the above comment, Many students are suffering in chemistry and science subject. You have solution for that if you will think other than the branded coaching institute. There are many good courses available online with fully solved papers like https://www.careerorbits.com and many other.

- 12 months ago

You can check Edugorilla for IIT material. https://edugorilla.com

- 7 months, 3 weeks ago

How to improve chemistry??

I really suck at it and it always pulls my rank down a lot.

We have just started organic chemistry.

- 3 years, 3 months ago

Organic chemistry takes a lot of time and patience to master.

In beginning i also faced this problem but fortunately we were given sufficient time to revise it again and again. in beginning you will forget reagents named reactions will remind you of biology.

Just one advice do GOC Properly . It is the KEY For ORGANIC.

I Had to do it again in march this year coz i didn't studied it properly in 11th .

- 3 years, 3 months ago

- 3 years, 3 months ago

Inorganic i cant say. i am myself learning it.

For physical i dont feel there is much problem.

Physical is just like know some formulae and concept and apply them to problems thats all!.

which part of physical are you facing problem?

- 3 years, 3 months ago

Gaseous state .

- 3 years, 3 months ago

Gaseous state? . that seems odd.

Real gases (theoretical part) is a bit tough to understand. rest its a simple formula application chapter

- 3 years, 3 months ago

and if you keep away FIITJEE AITS Organic chemistry is the most scoring part of chemistry along with inorganic.

- 3 years, 3 months ago

How yo join this community?

- 2 years, 9 months ago