All Questions
11 questions
2
votes
2
answers
104
views
Complex Power Conservation or "Boucherot's Theorem" - a proof without Nodal Analysis
Brief Question
I'm trying to figure out a proof for the Complex Power Conservation Theorem, which does not use Nodal Analysis.
Theory I know
In my university this theorem has ben taught with the name &...
- 21
3
votes
1
answer
588
views
Diode Power Dissipation
I am having trouble solving this PD question. I feel like it’s straight forward but I can’t seem to get the correct answer. I was curious if I could get help from the community.
Question: A p-n diode ...
- 57
0
votes
1
answer
183
views
How to show that all power in an RC circuit is delivered to the resistor
I am new to electronics and I've been working my way through the Art of Electronics. I've have been able to complete all the exercises up to this point but I have been struggling on this one. Right ...
- 9
1
vote
0
answers
81
views
Can someone confirm my derivation of the generalized power law from Practical Electronics, 4th edition?
I dont know how to use LaTeX, so I used Mathcha and took a snip from there.
- 135
0
votes
1
answer
824
views
How/where does a generator + motor dissipate heat?
I've got a mystery that I can't wrap my head around.
A generator is generating 1 kW of electric power. The current goes through copper cables to a motor, which is consuming say 950 W of electric power....
- 1,087
0
votes
1
answer
777
views
Given the power spectral density, how do I calculate the bandwidth and total power of \$X(t)\$?
Given the PSD (power spectral density), \$S_x(f)\$, of a signal, how do you calculate the bandwidth and total power of \$X(t)\$?
I think I have the bandwidth but how can I get the total power of \$X(t)...
- 159
6
votes
7
answers
6k
views
Why is power of a signal equal to square of that signal?
Is there any logic as to why the power of a signal \$\mathrm{x(t)}\$ is taken as \$\mathrm{x^2(t)}\$?
I searched everywhere and there's no clue. My professor told: "It's a standard result so shut ...
- 103
0
votes
0
answers
255
views
Type 1 surge protection: parallel or series?
Type 1 surge protection devices (SPDs) are installed at the outside edge of electric service, usually between the power meter and the meter base/socket, and protect the entire house. But how do they ...
- 735
0
votes
1
answer
1k
views
Average Power for "Infinite period of time" of a periodic signal
Last night in class we talked about the average power for any periodic function.
I'm just confused of why the one halves are in the bounds for this equation.
Since we are letting tau approach ...
- 59
-4
votes
1
answer
116
views
How much energy could we harvest from a 0.1V source (gedankenexperiment) [closed]
For the sake of a thought experiment, suppose two 10-metre balls appear magically somewhere on land. In the middle of the Sahara desert for example.
The balls are the terminals of a perfect voltage ...
- 5,497
3
votes
1
answer
4k
views
why ohmic losses increase with resistance?
Electrical newbie here. I'm trying to get understanding how is resistance involved with power dissipation (ohmic losses, eg. heating). Primarily I'm looking at Electromagnet coil, it says the losses ...
- 350