Search Results
| Search type | Search syntax |
|---|---|
| Tags | [tag] |
| Exact | "words here" |
| Author |
user:1234 user:me (yours) |
| Score |
score:3 (3+) score:0 (none) |
| Answers |
answers:3 (3+) answers:0 (none) isaccepted:yes hasaccepted:no inquestion:1234 |
| Views | views:250 |
| Code | code:"if (foo != bar)" |
| Sections |
title:apples body:"apples oranges" |
| URL | url:"*.example.com" |
| Saves | in:saves |
| Status |
closed:yes duplicate:no migrated:no wiki:no |
| Types |
is:question is:answer |
| Exclude |
-[tag] -apples |
| For more details on advanced search visit our help page | |
Results tagged with electronics
Search options answers only
not deleted
user 9887
Electronics is the study of electric circuits and electrical components, and the design of useful devices. Some questions in this tag may be more appropriate for the [Electrical Engineering(https://electronics.stackexchange.com/) SE site.
1
vote
Accepted
Resonant frequency in RLC circuit
Place another resistor of resistance $R'$ in parallel with the inductor and capacitor. The open-circuit input impedance of the two-port is then
$$Z_{11}(\omega) = R + \frac{j\omega L}{(1 - \omega^2LC …
- 60.3k
2
votes
why do we need a diode in a circuit?
Even in a 'DC' circuit, diodes can be useful for, e.g., current steering.
Consider a rudimentary battery backup system:
When the primary 14V supply is present, the LED is on while D2 and R2 preven …
- 60.3k
3
votes
Accepted
What is the difference of the two stable states of a Flip-flop?
A flip-flop (bistable multivibrator) is, in simple terms, two transistors wired together in such a way that there are two stable conditions: (1) one transistor is full "on", while the other if full "o …
- 60.3k
0
votes
When does Thevenin's theorem not apply (modelling a power source with a ohmic internal resis...
When does this model not apply/break down and for what reasons?
Thevenin's theorem assumes linearity. So, if your circuit is non-linear, the theorem doesn't apply. However, one can linearize th …
- 60.3k
3
votes
Could a variable capacitor divider replace a Variac?
I don't think you've considered the output impedance of such a divider.
Variable capacitors typically have relatively small capacitance which means that, at AC mains frequency, the output impedance w …
- 60.3k
1
vote
Analyzing the voltage output of clampers
First, for simplicity, assume the diode is ideal. For an ideal diode, the voltage across cannot be positive (the voltage at the anode is either equal to or less than the voltage at the cathode).
Sin …
- 60.3k
2
votes
Accepted
Full wave rectification
if there was no central tapping, what would be the change?
Consider this circuit diagram, from the answer you're not satisfied with:
There is no "central tapping" so the two diodes are connect …
- 60.3k
1
vote
Accepted
Non-ohmic conductors
My question is that,given this, how can we say that a conductor
doesn't obey Ohm's law.
For an example of how, consider a conductor with a voltage dependent resistance, e.g., a varistor
Sim …
- 60.3k
1
vote
Do resistor-based fan regulators save no power at all?
Looking at this analytically, let's model the fan, for simplicity's sake, as a resistance, $R_F$. We'll model the source as an ideal source and place a series resistance, $R_S$ between the source and …
- 60.3k
2
votes
Accepted
Determining energy stored in capacitor and inductor in RLC circuit
A couple of suggestions:
(1) the EE stackexchange site a better home for this question
(2) simply solve for the voltage across the capacitor and the current through the inductor. Once you have thos …
- 60.3k
0
votes
Current when resistance is 0
An ideal short circuit is that circuit element for which the voltage across is zero for any current through. One can think of the ideal short circuit in two ways:
(1) as an ideal resistor in the lim …
- 60.3k
3
votes
Can we "use" a capacitor while simultaneously charging it?
But I wanted to know whether we can charge a capacitor while it is in
use
If, by "while it is in use", you mean while the capacitor is discharging, i.e., energy is flowing out of the capacitor …
- 60.3k
0
votes
Ideal voltage source
Why is the internal resistance of the source zero in an ideal voltage
source?
For a voltage source with finite internal resistance $r$, the voltage $v_s$ across the terminals of the source is, …
- 60.3k
1
vote
Accepted
Question about full wave bridge rectifier
what I know is when a diode is forward biased, it conducts current,
when it is reverse biased, it acts as an open branch
There's a simpler, clearer way to think about it - a diode (ideally) all …
- 60.3k
1
vote
Does a diode show an "effective resistance" in a circuit, and how does that affect current d...
I'm posting this despite my conviction that:
(1) this would be better homed on EESE and
(2) it is almost certainly a duplicate there (and possible here too)
(Because I = V/R and I = 2.96/102, approxi …
- 60.3k