Recent content by Marcin H

Did I post this in the wrong place btw?

I am trying to understand how to derive equations for the inductance of an x-conductor line. Any number really. But I want to understand the proof for a two-conductor line first. So to start any of these proofs you first need the equation for the per unit length inductance: I know R is...

Sorry. Once I get one question my brain just floods with 1000 other ones. I'll hold off for a bit and see if things clear up in class. Thanks for the help thus far.

Thank you for the lengthy response. This actually cleared up a lot. I think after a few more classes and examples I will have a much better understanding of this. Could you explain what geometric mean distance (GMD) is exactly and how it's used? Is it only used if the distance between our...

Oh, ok. We just go to the part where we can model transmission lines as RLC circuits connected together. As for the capacitative reactance between the wires and the ground, is the difference really that big? In a horizontal arrangement of the transmission lines you wouldn't have this...

I understand that we want our 3 phase network to be balanced in load and impedance, meaning we want the same current flowing through each line and the same impedance on each line. Just to clarify one point there the impedance from the wire is coming from the resistance of the wire and the...

This is more of a conceptual question and not a homework question. I am having a hard time understanding why we have to transpose transmission lines and how physically moving them changes anything. Do we only transpose in 3 phase transmission lines when we have 3 wires? Does the orientation...

Thank you for the response. I still don't understand how accumulation, depletion, and inversion work. How can we tell if a device is in one of those regions? In the problem we are not given a gate voltage, which is how I thought we find out which region the device is in. How do we find the...

Homework Statement Homework Equations Energy band diagram equations. The Attempt at a Solution This is more of a conceptual question, but this is the problem I am working on for reference. What is the difference between a flat band diagram and an equilibrium diagram? I know what they will...

I can find the generation rate by [(1E14 cm^-3) - (5E13 cm^-3)]/13.9us but this isn't the equilibrium generation rate right? Or is it?

Homework Statement A sample of Si at room temperature is doped with acceptors at a concentration of 3E16 cm^-3. An excess electron hole pair density of 1E14 cm^-3 is generated at some time t = 0. At t = 13.9 μs the excess EHP density is measured and found to be 5E13 cm^-3.(A). Does the initial...

Thanks!

Can you explain this a bit further. What do you mean by quantum number? What is a quantum number? Also, if I am understanding this correctly you are saying that if we have 1 silicon atom with an orbital or energy level at 7ev then another silicon atom that bonds with this one can't have an...

Homework Statement This isn't really a problem, but I wanted some clarification on this topic. In an energy band like the one I drew below, what determines the size of the conduction band and valence band? Etop - Ec and or Ev - Ebot? Is that just a property of the material? Also, how do...

What values should I use for the effective mass of electrons/holes in equation 3-26? Also, is the h in that equation h(bar)? Or something else?