New answers tagged physics
4
votes
Is it possible to ignore Nyquist-Shannon theorem?
I was thinking about accumulating data and then doing some maths on
this.
How would you figure-out which frequency produced the samples (black dots): -
Blue is over-sampled and red is under-sampled.
...
- 389k
1
vote
Accepted
Thermionic emission
Are you searching something as this?
From this paper ...
EE&O ... Here is a Maple sheet for evaluation. Hope this help.
NB: kappa and S (area of the emissive device) are "evaluated" ...
- 5,896
0
votes
Reactive power and eletro-mechanical analogy
One of the subjects that constantly helps me form a good analogy in electricity is water or fluid dynamics, a very easy topic to learn and super useful in analogies.
I'm writing this without an answer,...
- 143
-1
votes
Can't find error in nodal analysis
Using nodal analysis we have:
$$
n_1:\frac{v_1−V}{R_1}+ \frac{v_1}{R_2}+ \frac{v_1-v_2}{R} = 0
\\
n_2:\frac{v_2−V}{R_4}+ \frac{v_2}{R_3}+ \frac{v_2-v_1}{R} = 0
$$
$$
\begin{bmatrix}
G_1+G_2+G & -...
- 24
4
votes
Can't find error in nodal analysis
Your equations ignore the current through R. You can't do that.
If you don't believe this, think about what happens when R is 0.
For example, your node1 is missing the term
\$ \frac{+v_2 - v_1}{R}\$ ...
- 28.1k
7
votes
Can't find error in nodal analysis
I found out the drop voltage at \$R\$ which is -34. But the solutions say
it is -28V. I can't find what did wrong.
$$\color{red}{\text{Neither answer is correct }}$$
Think about it: How can the ...
- 389k
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