The circuit-theory tag has no usage guidance.
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2answers
85 views
What does this circuit show?
I am just starting out looking at more complex circuit diagrams, and I really do not understand what is being shown here
My initial guess was that this was a series circuit with the probe (consisting ...
1
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2answers
61 views
Basic circuit with diodes analysis
I have the following circuit:
How to determine the waveform of Vout, maximum values for positive and negative half-period segments, and the average value of Vout?
Input voltage Vin has a sinusoidal ...
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1answer
43 views
Adding a delay to a door alarm?
Hi guys I saw these window/door alarms https://m.dollartree.com/h5/r/product/Battery-Powered-Window-Alerts/p328789/index.pro at the dollar tree that work off a reed switch. When the magnet bar is ...
3
votes
2answers
237 views
Is voltage and current sources linear or nonlinear?
From the circuit theory it is known that an element whose response is linear is called linear element such as resistor, capacitor. For example, in case of resistor the slope between V and I is a ...
1
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1answer
42 views
capacitive proximity sensor - how does it work
I know 3d printers such as the i3 use a Capacitive proximity sensor to try compensate for the uneven surface of the print bed. for example this one seems to be popular
https://www.amazon.co.uk/gp/...
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2answers
53 views
CMRR for an ideal op amp
In the question, he told me from the begging that it is an ideal op amp .. so A(cm) =0 !!
How can I find the CMRR then !!
I tried to analyze the circuit to be sure!! And i got the same !
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3answers
85 views
Why is the current in this circuit 100mA?
I am just learning electronics and trying to reason some figures I measure in simple circuits.
I need a bit of a hand with this one.
I have a 3.2V power source, and 2, 1 ohm resistors wired in ...
0
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1answer
34 views
RL circuit Step-Response Equation explaination
Im having difficulty understanding the integral calculation in number 4. How does (Response) section of "V/L" convert into "V/R"? Where does exponents go?
The last equation is from the textbook.
*I ...
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2answers
76 views
Simple KVL Problem Not So Simple
We're only a week in to the first EE class here at Uni and I'm already stumped. I can build a power supply in my sleep but anything theory-related turns me upside down. Now, I've done KVL on the ...
2
votes
2answers
182 views
First order circuit with t=0+ , t=0-?
Yesterday I tried to solve a question in a second order circuit , but I couldn't ! because I have problem understanding the concept of 0+ , 0- !
So let me try it in a first order circuit , it ...
2
votes
1answer
73 views
Finding some variables in a second-order circuit?
Can any one please help me solving these questions .. I always get a wrong answers :/
The first order circuit is much easier than this one !!
This is my answer :
for the first time i thought it ...
-1
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1answer
55 views
Mismatched transmission line at DC
The characteristic impedance equation in transmission line theory is this:
$$Z_0 = \sqrt {\frac{R+j\omega L}{G+j\omega C}}$$
Take the case of a twisted pair transmission line, say the cat6 cable ...
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7answers
4k views
What's wrong with parallel conductors?
Regarding AC systems (like for homes and such), a circular path is called a parallel conductor. It's illegal (according to the NEC section 310) except under certain circumstances. But I have noticed ...
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1answer
82 views
Since, resistance is a passive element, so why its value comes out to be negative?
In thevenin's theorm,
In a circuit with current dependent current source (value=2i, pointing downwards), in parallel with 2 resistors in parallel i.e 2ohm and 4ohm. And current "i" in 2ohm resistor ...
-1
votes
2answers
52 views
What damage can 1500V cause to a circuit? [closed]
I'm working on a device that has a supply of 220 V. The output has an LED at the end of a fibre-optic cable coming from the device in question.
If, for some reason, a tremendous amount of voltage ...
0
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1answer
54 views
voltage in an electrical circuit consisting of a current source
In the following circuit is it correct to ignore the current and simply add all the voltages to measure voltage at open end?
simulate this circuit – Schematic created using CircuitLab
If it is ...
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1answer
25 views
Finding CutSet Matrix from a Circuit
I have the following question
My answers are
Please let me know if my approach and answer is correct to find the Cut Set Matrix.
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1answer
120 views
Current Division Rule
I have the following circuit.They are simplifying the circuit and applying
current division
To use current division the incoming current should not have a resistor in between,right?
But in this ...
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2answers
67 views
Equivalent Current in Circuit
I have the following circuit:
I'm trying to calculate the equivalent current. In my approach resistors 2 and 1 are in parallel so their equivalent resistance would be 2/3 then since resistors 1 and ...
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2answers
62 views
Equivalent resistances with the superposition theorem
I have the following definition and explanation of the superposition theorem. I don't understand how the resistance values are calculated. I understand that \$R=V/I\$, so \$I=V/R\$. But how is the ...
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1answer
22 views
Disambiguation of AC Analysis and Small Signal Analysis
I am trying to understand Small Signal Analysis (SSA) for Diodes and BJT transistors through different textbooks but I have some issues.
Is AC Analysis the same as SSA? I have seen hints that imply ...
