Darth Vader

@ArhamJain I already have read the NCERT but not really gone through the questions. I will, though, if that's what you recommend. Either way I have the board fast approaching,I had PE today. I did find the PDF on the internet. So I guess all that's left is me actually studying ::sigh::

@ArhamJain Thanks for the advice, at this point I'm willing to try anything short of a sacrifice to the Gods

I filled the form for April attempt but I'm not preparing for Mains anymore, only Advanced now

@Anindo Try Mohit Tyagi lecs on YouTube

@Sahaj Yeah, been underground for a while...Mains? it was worse than I thought...Organic Chemistry evades me like the 3x+1 problem does mathematicians. Still, not too bad, I suppose. Half the people around me are congratulating me and the other half are telling me not to let it get me down lol

@Sahaj yeah that's actually happening here for the regular batches too... i don't know about how much content you're covering in classes etc. but from what you told me, not fast enough...the best you can do is cover level-2 and final step Cs for all chapters, and if you have a lot of time on your hands, try level 3 too... at most there will be 2-3 small topics per chapter that they're leaving for later, so you can skip those too

@DS yeah that's actually better than ours

See ya

@Sahaj Not in 11th, but pretty much we covered them in 10th

But I think whatever their pace is, you'll do math fine

I don't know what they teach in sets and relations, so I have no idea

Well we were directly taught quadratic equations and Trigonometry

Look at the pinned messages

t.me/vmclectures

If you want, I can send you recorded lectures to do at your own pace. They're by teachers who teach me offline, so pretty good

Yes, yes it is

Well no offense but you're going too slow, we did it in like a week and still barely completed 11th by January.

Since when have you been having classes?

@Sahaj Though the Allen Handbooks (in the folder I sent you) do a fine job if you really don't want to make them

Are you done with kinematics/ 2D yet?

I'm wondering how you'll remember them for two years now

I'm literally making them for electrostats right now

Yeah, well you'll have forgotten all of atomic structure in 12th so keep up no matter how boring it seems

Do you make short notes for revision?

@JohnRennie That's very kind of you

@JohnRennie Sorry to interrupt your conversation but thanks a lot, I got it. I wish you were my instructor :)

I got to the part where the centre of mass is at 2L/3 from the left end but then the solution goes something like "put x-2L/3 in place of x in linear mass density" but are we not changing the mass density with our coordinate system by this?

Find the moment of inertia of a rod about an axis through its centre of mass and perpendicular to the length whose linear density varies as λ=ax where a is a constant and x is the position of an element of the rod relative to it's left end. The length of the rod is l.

Hello sir @JohnRennie, can you please look at this problem whenever you're free

I see, thanks a lot!

That is, incoming field lines= outgoing field lines?

Yeah, it was rather confusing when I first saw it

Thanks a lot for your time

I think I got it

Yes

Yes

Yes

So we take incoming flux as positive and outgoing as negative?

Yes

Yes

Yes

Not crossing them

No, a cuboid in between the plates instead

Yes sir

Yeah, thanks

For eg, we have two parallel charged plates having surface charge densities + $\sigma$ and -$\sigma$ and I want to find out electric field in the region between them. If I apply Gauss's law then $q_{net}=0$ for any chosen Gaussian surface then electric field should be zero.

Oh you're here, nice

When you're free, I'm wondering wherever Gauss's law can be applied

Hello sir @JohnRennie

A less elegant approach would be finding the sum of $2sin2 ^{\circ} +4sin4 ^{\circ}.. 178 sin 178 ^{\circ} + 180sin180 ^{\circ} $. The last term takes the value 0, then club the terms whose sum of coefficients is 180 since$ sin \theta= sin (180 ^{\circ} -\theta)$. See where that takes you.