Problem Solving Strategies

the solution matches!

@NOTEBook But the good thing about having made that mistake is now you'll remember it!

@PinkAura The best reason for doing something is that you will enjoy it. If you think it will be fun then I'd say go for it..

We know the total resistance between A and B is ¹⁄₂R. Yes?

If all I have to do is listen to you solving it yourself that's still a perfectly good use of my time :-)

@SamyakMarathe No-one enjoys the JEE preparation. Every student I've chatted to here finds it depressing. This probably doesn't make you feel better, but maybe it's some comfort that you are not alone.

It's simpler than you think.

You're welcome :-)

physicsbrawl.org

Yes, I think the advanced is less about just memorising facts and more about reasoning.

@PrateekMourya I have no immediate plans to stop :-)

"Intuition" is a funny thing. Really it just means "what we're used to".

So m = -³⁄₂

Physics is maths

Zones II and III are isolated so no charge can flow in or out.

Oh so 5q/ ## epsilon_0## would be flux in the whole 4π angle

You can imagine a cone with the apex at the +5q charge and the axis along the line between the two charges, and the solid angle subtended by the cone is ⁴⁄₅𝜋, then all the field lines inside the cone go to the -q charge.

@JohnRennie Thank you so much and all others for helping me out...I got into IIT Hyderabad finally...

It's traditional in the UK to say "Break a leg!".

It will follow a circle only if mv²/r ≥ mg cosθ everywhere around the circle, where θ is the angle to the vertical.

@satan29 When the hardest part of a question is figuring out what the examiner had been smoking when they set it, that's usually an indication it is not a good question :-)

Now we think quantum mechanics is true because so far it has never been disproved, but quantum mechanics is less than a hundred years old. Give it another two hundred years and who knows?

The JEE preparation is such a traumatic process that I think once it's past students tend to want to forget about it.

When a chemist writes dU = dq + dw the "dw" means: the work done on the system

In the UK it's traditional to say "Break a leg!"

Undelete McAfee. Then burn the installation media. Then throw the ashes down the toilet.

No. When physicist writes dU = dq - dw the "dw" means: the work done by the system

I did see Steven Hawking when I was a student, but I only saw him at a distance. I didn't speak to him.

@PrateekMourya maybe in 40 years when you're retired as well :-)

I'll be 60 in February.

Most of us don't worry too much about what entropy really is. We just use the equations for the change in entropy and carry on with our lives. I recommend this approach :-)

@satan29 congratulations, you are the millionth student to ask this :-)

Ah. I still have the copy of Hecht's book that I used in 1980 :-)

@robertpatrick hi, yes you can ask JEE questions here.

We don't like homework questions on the main site, but in the chat rooms they are fine.

wonderwall equation :-) That's one hell of a phone autocorrect error :-)

Happy New Year IST

"Why" questions are always tricky in physics. Quantum field theory gives us a way to calculate how charges interact, but once you start asking yes, but what really happens? we're moving away from physics and towards philosophy.

And even though it's a terrible thing to say, the way you get a good rank in the JEE isn't by being great at physics, it's by being great at answering JEE questions.

@RonaldBecker OK :-)

(I didn't have a GIF of a woman so I drew a confused JEE student :-)

Verma must have copied from me :-)

its so poorly written....I just can't stop raging whenever I hear NCERT

And I quite enjoy solving some of the problems as they are surprisingly hard.

@PrateekMourya I'm retired and I have a lot of free time to fill.

But I guess the basic form is fine i.e. we get a sinusoidal oscillation. It's just the correct solution should have a constant term added to it.

calc during JEE is a pain..

@Ishwaran You're always welcome to ask questions here :-)