Recent content by PumpkinCougar95

How do we know that constants in nature like the Gravitational constant or plank's constants are actually "constant" and don't actually change over time? What sorts of experiments have been done which verify these things?

Not interested in the book, but here is a problem I find interesting. Consider 2 point charges Q1 and Q2, separated by a distance d. (Q1> 0, Q2<0)If an electric field line originates from Q1 and makes an angle with the line joining the two charges near Q1(say ##\alpha##), then what angle would...

Just like you use the superposition principle to find the net ##E## field for a system of charges. You can superimpose a small disk on a sphere. The Electric field due to a spherical shell at a distance ##\delta## away from the shell is $$ E=\frac {Q} {4 \pi \epsilon (R+\delta)^2} $$ And for a...

Thanks ,that makes sense.

I am not able to understand why compounds have colour. I have read that it is due to excitation of electrons from one atomic/Molecular orbital to another because of which certain wavelengths are absorbed, And we can see the "complementary colour" of those wavelengths. What I don't understand is...

Well for a certain pressure and volume of the tank you have a definite amount of gas which you can calculate from ##PV = nRT## Hence the volume of air in per sec should be equal to the volume of air out per sec. So you would have $$ \sqrt{ \frac 2 {\rho} P } \times A_{out} = V \times A_{in}$$...

The magnetic Field does not do work on moving charges as the Magnetic Force is always Perpendicular to the Velocity and hence Power is Zero (P = F.v) According to me the No uniform magnetic field magnetises the iron nail and induces a Dipole in it. Since the field is non-uniform there is a...

oh, Thanks a lot! Now, what about the first question? Is it possible to find this out without some sort of boundary condition?

A simple google search gave: http://hyperphysics.phy-astr.gsu.edu/hbase/phyopt/sinslit.html

But ## \oint E \cdot ds =0 ## is NOT true in this case, Even though flux is zero through the loop at all times: https://drive.google.com/open?id=18tjoiyAjjD1XAXgmZn_3UKgbtMrFZ6zz

So what do you think?

I meant inducing a current. Edit: Here it is https://drive.google.com/open?id=1tuqI1S7juh8iZhb8t2TaPrVm82CaL5mU

This post has made me wonder even more. Should there be an emf in this case too? https://drive.google.com/open?id=1tuqI1S7juh8iZhb8t2TaPrVm82CaL5mU I am saying this because the induced E field is stronger the closer you get to the region with changing magnetic field. And If it does, Doesn't...

If there is a very very big(infinitely big) region of space where ## \frac {dB} {dt} = constant ## what would be the E field at any point? Obviously ## \nabla x E = constant ## but what after that ?

Q1 will contribute no x component, Q2 will contribute no y component. But You have to Add them like $$ E_{net} ~=~\sqrt{ {E_x}^2+ {E_y}^2 } $$