All Questions
Tagged with capacitance frequency
12
questions
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Why does this RLC behavior differ from what equations predict?
In order to better understand RLC behavior under current sources, I constructed the simple circuit below and attempted to analyze it. However, my equations do not agree with simulation results.
The ...
- 309
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votes
2
answers
239
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What is the angular frequency $\omega$ in which the maximum current occur?
for a circuit which consist of an AC supply, an inductor, a resistor and a capacitor, the differential equation would be $IR+V_C-V_0 cos(\omega t)=-l\frac{dI}{dt}$.
Taking another derivative with ...
- 83
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1
answer
65
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How to derive the equation for capacitive reactance? [closed]
How to derive the equation for capacitive reactance $X_C$?
$$X_{C}=1/(2\pi fC)$$
with $f=$ frequency, and $C=$ capacitance.
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Question about the impedance of a RLC circuit
I made an experiment with a RLC circuit, and I found the resistance, the capacitance, and the inductance with measures. So I decided to calculate the impedance of the circuit, depending on the ...
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10
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Why does a capacitor act as a frequency filter?
What is it about a capacitor which allows it to filter frequencies?
I understand the construction of a high-pass RC filter, and the mathematics behind it, but I'm struggling to find an explanation of ...
- 267
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votes
1
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How to calculate capacitance when inductance in known? [closed]
Below is the diagram (sorry for bad accuracy) that shows how current changes with time in LC circuit. On X-axis we have time measured in milliseconds (ms) and on Y-axis current measured in ...
- 113
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votes
2
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303
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Resonance frequency with metal
I've made an experiment with resonance frequency of a LC circuit. One part was to place a metal (I think iron) in the middle of the induktivity of LC circuit.
I measured a higher resonance frequncy as ...
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-1
votes
1
answer
93
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How do I derive the frequency of oscillation of the capacitor voltage? [closed]
The formula is $$\omega= \frac{1}{\sqrt{L \times C}}.$$ How do I derive this?
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4
answers
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Why is neper frequency called a frequency?
In the context of complex frequency of RLC circuits, the real part is called neper frequency, according to units it's understandable that it has 1/s as the unit which is same as frequency but what is ...
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2
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Gain as a function of frequency (RC high pass filters)
I configured a simple series RC circuit. Across the circuit I have placed the terminals of a sinusoidal AC voltage source (I'm using my phone as a function generator). My goal has been to measure the ...
- 504
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votes
1
answer
110
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Capacitor and inductive coil in AC circuit
Does increase in $L$ of inductive coil with variable no. of turns or $C$ of capacitor with changeable capacitance increase frequency of the circuit?
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1
answer
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Calculating half power frequency (frequency response)
I am having a doubt in calculating half power frequency for a given RLC AC circuit. I have attached images of two questions with their solutions. In the first question, the equation for $\cfrac{|V_2|}{...
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