Capacitor in AC Circuit: Why there is such relation of current and voltage?

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Discussion Overview

The discussion revolves around the relationship between current and voltage in an AC circuit, specifically addressing why current is at its maximum when voltage is zero and vice versa. Participants seek explanations and clarifications on this phenomenon, exploring theoretical aspects and mathematical representations.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant notes that in an AC circuit, current is maximum when voltage is zero and reaches zero when voltage is maximum, prompting a request for explanation.
  • Another participant states that current is proportional to the rate of change (derivative) of voltage.
  • A request for further clarification on the concept of "rate of change" is made.
  • A mathematical expression relating current and voltage is provided: i = c \frac{dv}{dt}.
  • One participant shares a link to an external resource that purportedly explains the relationship well.
  • A request for applying specific values to the mentioned formula is made, indicating a desire for practical understanding.
  • There are corrections regarding the use of language and communication standards in the forum, with references to previous discussions on the topic.

Areas of Agreement / Disagreement

The discussion includes multiple viewpoints regarding the explanation of current and voltage relationships in AC circuits. Some participants seek clarification and further examples, while others focus on the mathematical representation. There is no consensus on the explanations provided, and the discussion remains unresolved.

Contextual Notes

Participants express varying levels of understanding and clarity about the concepts discussed, with some seeking more detailed explanations and practical applications of the mathematical formula. There are also references to communication standards that may affect the clarity of the discussion.

akmafia001
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http://imageschip.com/image-2CC0_4D720BE9.jpg

In AC circuit when the voltage is zero the current is maximum...
When it reaches to 90 then the current is zero...
And same as for the other cycles till 360...

Why the current is maximum when the voltage is zero and when the voltage is maximum the current is zero...?

Please explain...
 
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The current is proportional to the rate of change (derivative) of voltage.
 
can u explain it a bit more?
 
[tex]i = c \frac{dv}{dt}[/tex]Do you know what "rate of change" is?
 
thnx... it helped...

uart can u apply some values on the above formula that u have mentioned?
 
did i written something wrong?
 
akmafia001 said:
did i written something wrong?
Yes. From the https://www.physicsforums.com/showthread.php?t=414380" "In the interest of conveying ideas as clearly as possible, posts are required to show reasonable attention to written English communication standards. This includes the use of proper grammatical structure, punctuation, capitalization, and spelling. SMS messaging shorthand, such as using "u" for "you", is not acceptable."
akmafia001 said:
thnx... it helped...

uart can u apply some values on the above formula that u have mentioned?
 
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