# Recent content by jaus tail

1. ### Magnitude and direction of k vector

Thanks for the guidance.
2. ### Magnitude and direction of k vector

Shouldn't direction be unit vector like The vector you mentioned divided by |k|?
3. ### Magnitude and direction of k vector

To be honest this is all so maths. Thanks for this. What does 78540 signify. I mean so much radians / cm.
4. ### Magnitude and direction of k vector

I didnt understand the question. The magnitude is 2(pie)/wavelength. I get 78500 rad/cm which is pretty wrong as guess. Where would angle come into picture? Ref: https://www.millersville.edu/physics/experiments/062/index.php Shouldn't direction be like i + j + k ? So will it be like: |k|cos30...
5. ### How is this graph Hamiltonian and Eulerian?

Thanks. Guess the website has it wrong then.
6. ### How is this graph Hamiltonian and Eulerian?

Is the graph Hamilton and Eulerian? The website says the graph is Hamilton and Eulerian but I think it's wrong. Ref: https://scanftree.com/Graph-Theory/Eulerian-and-Hamiltonian-Graphs There is no path that covers all paths only once. Any help? I think the graph is drawn wrongly.
7. ### (resolved) Seebeck effect: why can't electron+hole combine at cold end?

Sorry for question. I found a more appropriate diagram: Ref:
8. ### (resolved) Seebeck effect: why can't electron+hole combine at cold end?

Hi, In seebeck effect: Ref: Once the red region is hot, the electrons and holes move toward cooler region i.e. bottom. So there is a positive potential toward right side of cold side and negative region toward left side of cold side. So why can't the electrons and holes combine here only...
9. ### Wireless Power Transfer (is this correct)

How Could you explain the working of this circuit? I found a slightly difference circuit: It says: In transmitter section, the Transistor is generating high-frequency AC current across the coil and the coil is generating a magnetic field around it. As the coil is center tapped, the two sides...
10. ### Wireless Power Transfer (is this correct)

But I drew the original circuit that I have posted in matlab simulink and was able to get oscillations. I had kept source voltage around 0.4V
11. ### Wireless Power Transfer (is this correct)

Ref: https://www.semanticscholar.org/paper/Design-and-Simulation-of-Different-Wireless-Power-Baroi-Isla m/dc19ecfde904964704777ab5adef96d5d6846f1f I couldn't find the working of this circuit so I guess it would be like: Initially transistor is OFF, so the current flows through Base, and...
12. ### How does a PLL work?

Oh boy! Electronics is super difficult. Electrical engineering is easier, to be frank, cause there at least we can visualize stuff. With electronics, it's more maths and equations :(
13. ### How does a PLL work?

Thanks for all the replies. It's very helpful. Sorry for the late reply. I had gone home for holiday. This is where I have doubt. If the difference between input and output phase is zero then the output of LPF will be zero and thus the VCO will get 0 signal in that case? Or maybe the final...
14. ### How does a PLL work?

I'm just having a hard time to understand why convert phase difference to frequency output. I mean in feedback the goal is to reduce output error. Like you run a system, and the feedback will give part of output to the input. This will be error and the final goal is to reduce error by using...
15. ### How does a PLL work?

So if the output frequency is same as input frequency why would the PLL be used? To get stable frequency as output? I read about Frequency Multiplier now though. Thanks for the answers.