What is Stored in a Capacitor and an Inductor?

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Homework Help Overview

The discussion revolves around the concepts of energy storage in capacitors and inductors, focusing on the nature of what is stored in these components and the implications of charge and potential difference.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore the idea that a capacitor, despite having a net charge of zero, stores something, with suggestions that it may be electric potential or energy in the electric field. The role of the electric field and the comparison to inductors is also discussed.

Discussion Status

The conversation is ongoing, with participants questioning the definitions and assumptions regarding charge and energy storage in capacitors and inductors. Some guidance has been offered regarding the nature of energy storage in the electric and magnetic fields.

Contextual Notes

There is a noted confusion regarding the net charge on capacitors and the implications for what they store, which may be affecting the clarity of the discussion.

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Since the net charge on a capacitor is zero, what does the capacitor store then? Is it electric potential?
 
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The net charge on a capacitor is zero?

[tex]Q_{Charge} = C_{Capacitance}*V_{Voltage}[/tex]

The confusion probably spouts from the fact that the capacitor stores equal and opposite charge on either plate, but the potential difference is what causes a movement of charge from one plate to another.

[tex]E_{Stored}=\frac{1}{2}CV^{2}[/tex]
 
yes, since the capacitor stores equal and opposite charge, its net charge is zero... which is why I'm wondering what the capacitor stores? I'm guessing it's storing potential
 
There is an electric field between the plates. The capacitor stores energy in the electric field.
In the same way, a current through an inductor produces a magnetic field. The inductor stores energy in this field.
 

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