How Do You Convert Charge to Energy in Capacitors?

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Homework Help Overview

The discussion revolves around the conversion of charge (in Coulombs) to energy (in Joules) in the context of capacitors, particularly in relation to an experiment involving static electricity and the discharge from a charged material.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants explore the conditions under which charge can be converted to energy, emphasizing the need for additional context regarding the process involved. Questions arise about the specific parameters of the experiment, such as the capacitance and voltage.

Discussion Status

Some participants have provided guidance on the relationship between capacitance, voltage, and stored energy, while others seek clarification on the relevant equations and their application to the specific experiment being discussed. Multiple interpretations of the problem are being explored.

Contextual Notes

Participants note the lack of information regarding the time for the discharge and charging of the capacitor, which is critical for understanding the energy conversion in this scenario.

Marte82
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Hi!

Can anybody tell me if there is a way to convert charge (in Coloumb) into energy (Joule). I know It's not just a quick and easy formula, but I would be most glad if anybody is able to help me..

:shy:
 
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Marte82 said:
Hi!

Can anybody tell me if there is a way to convert charge (in Coloumb) into energy (Joule). I know It's not just a quick and easy formula, but I would be most glad if anybody is able to help me..

:shy:

This conversion isn't possible without knowing that PROCESS this is relevant to. For example, one can do such a conversion for the amount of charge emitted per second from a photocathode that is detected by an anode via the measured photocurrent.

But without more description from you, this is impossible to do.

Zz.
 
ZapperZ said:
This conversion isn't possible without knowing that PROCESS this is relevant to. For example, one can do such a conversion for the amount of charge emitted per second from a photocathode that is detected by an anode via the measured photocurrent.

But without more description from you, this is impossible to do.

Zz.

I'm doing an experiment with static electricity; measuring the discharge (in nC) from a charged material by an electrode conected to a capacitor and a oscilloscope. And I want to know how big the energy is(so I can know weather the spark has enough energy to be an ignition source). Unfortunately I don't know the time for the discharge or the charging of the capacitor...
 
If you know the capacitance, there is an equation relating the energy stored (in Joules) to the capacitance and the voltage. Do you know this equation?
 
berkeman said:
If you know the capacitance, there is an equation relating the energy stored (in Joules) to the capacitance and the voltage. Do you know this equation?

The capasitor is 100 microFarat. What equation?
 
Marte82 said:
The capasitor is 100 microFarat. What equation?

This page discusses capacitors in general, and will help you figure out the equation for the stored energy:

http://en.wikipedia.org/wiki/Capacitor
 

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