Recent content by PhDnotForMe

My answer to this would be because it is not infinite or closed. What do you think is the answer?

My question is going to be rather specific. I am trying to understand how Gauss's law applies to this scenario. I know if a cylindrical shell is infinitely long, and there is an external electric field, the inside of the shell will have an electric field of zero everywhere. I am wondering...

If it is a man made vacuum on Earth in my living room, will the charged object inside ever discharge?

I see. What if the ball was floating in a vacuum? Would it ever discharge? Can electrons jump within a vacuum or would that require an absurdly high amount of charge

So charged metal ball touching a wooden table will never discharge? Even after a long time like a year?

If I have a metal electric conducting ball the size of an average snowball (Happy Holidays) and give it a charge of say 0.1 Coulombs and set it on a wooden table, will it ever discharge if not touched by anything else? If so, if it is wrapped in an electrical insulator, will it ever discharge...

Okay. So if I see a stationary proton and that proton begins to accelerate faster and faster in some direction, the B-field created will increase as it moves faster. Because the B-field changes, the E-field must change too. Will the transverse E-field of the proton increase or decrease?

Oops. I was looking at the link I referenced following the statement. I will put it below this message as well. https://en.m.wikipedia.org/wiki/Current_density Can you give me an example of a case where J is not related to v?

It does depend of J. That is correct. From what I'm looking at J depends on v. The equation being J = pv. https://en.m.wikipedia.org/wiki/Current_density When considering just two particles, I still see no way for the v in context of "vB" to be a different v than the one found in "J=pv"

I see that v is the velocity of the frame that you are transforming to relative to the frame that you are transforming from. My issue is with B. B is dependent on v as well. And I can't seem to see how these two v's would be anything but equal.

Okay, so I'm looking at the line that reads E⊥′ = γ (E⊥ + vB) In "vB" what is v? B field created from moving point charge is proportionate to the v velocity of said point charge. Are these both the same v? Does that mean vB proportionate to v² ? Where v is the relative velocity of the...

The previous ones states that electric field and magnetic field change with respect to the frame. In this example I do not see how the electric field can be any different regardless of the chosen frame.

It does. It states "an atom or group of atoms that carries a positive or negative electric charge as a result of having lost or gained one or more electrons"

Yes, I agree with what you said. It is not an atom. Thanks for reassuring me. Webster says it is an atom, why is that?

Doesn't matter at all actually! I am merely wondering what the accepted definitions are within the physics community.