MH's ideal coil and voltage question

[MileHigh]

When people start going into stuff like charge carriers and whatnot, it's usually a sign that the discussion is going nowhere and people are just spinning their wheels and going through the same old motions.

Nobody was able to answer the first question, and that includes all you experimenters.

How about trying to tackle Partzman's question now that the first question has been answered for you?

It went something like this:  You have an ideal five henry inductor.  There is an ideal voltage source that is put across the inductor at t=0 and for two seconds the voltage applied across the inductor is a linear ramp that starts at zero volts and ends at two volts.  After that the voltage is zero volts.  What happens?

Now, is anybody going to say something about this?

[tinman]

   Capacitor = potential .
 
   Sounds good to me.

Inductor = kinetic.

With the exception of MHs question,between T=3s and T=5s,where the magnetic field is stable,and so the stored energy is potential energy.


Brad

[tinman]

When people start going into stuff like charge carriers and whatnot, it's usually a sign that the discussion is going nowhere and people are just spinning their wheels and going through the same old motions.

Nobody was able to answer the first question, and that includes all you experimenters.

How about trying to tackle Partzman's question now that the first question has been answered for you?



Now, is anybody going to say something about this?

It went something like this:  You have an ideal five henry inductor.  There is an ideal voltage source that is put across the inductor at t=0 and for two seconds the voltage applied across the inductor is a linear ramp that starts at zero volts and ends at two volts.  After that the voltage is zero volts.  What happens?

The current ramps up on a linear ramp,but 90* behind that of the voltage ramp,and ends with a value of 800mA,and maintains that value until interrupted.?


Brad

[MileHigh]

That's not right but more importantly how did you arrive at that answer?  That's the whole point for the brainstorming, to bounce ideas back and forth.

The other question is why are you talking about phase here and how do you define it?

[Magluvin]

Question Mags,,

Are these electrons stacked up in a straight line or across in a straight line?

It takes more "energy" to put the last electron into place than it does the first one,, just like stacking bricks,, the low ones are easy,, the high ones are harder.

Hmm. How much simpler can I put it?  Poynt is stumped also.


Ok. Here is another set of questions. We will start from the very beginning. These should be very basic knowledge questions.  All refer to a 1000uf cap charged from 0v to 10v....


Does anyone here believe that when we charge a cap, that we are depleting the pos plate of electrons, and adding extra electrons to the neg plate?

If we have say a 1000uf cap and we charge it from 0v to 10v, are there electrons pulled from the positive plate and electrons pumped into the negative plate during the charge period?

Is the reason the positive plate becomes positively charged because it is stripped of electrons, and that the negative plate is becomes negatively charged is because it has taken on extra electrons?


If you do not agree that the answer to those 2 questions should be 'Yes', then I need an explanation as to why.


Mags