What is Stored in a Capacitor and an Inductor?

  • Thread starter indigojoker
  • Start date
  • Tags
    Capacitor
In summary, a capacitor stores energy in the electric field between its plates, despite having a net charge of zero. This is similar to how an inductor stores energy in a magnetic field created by a current passing through it.
  • #1
indigojoker
246
0
Since the net charge on a capacitor is zero, what does the capacitor store then? Is it electric potential?
 
Physics news on Phys.org
  • #2
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]
 
  • #3
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
 
  • #4
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.
 

1. What is a capacitor?

A capacitor is an electronic component that stores energy in the form of an electrical charge. It is made up of two conductive plates separated by an insulating material, known as a dielectric.

2. How does a capacitor store energy?

A capacitor stores energy by accumulating opposite charges on its two plates. When connected to a power source, one plate becomes positively charged and the other becomes negatively charged, creating an electric field between them. This electric field stores the energy until it is released.

3. What kind of energy does a capacitor store?

A capacitor stores electrical energy in the form of an electric charge. This energy can be converted into other forms of energy, such as heat or light, when the capacitor discharges.

4. How much energy can a capacitor store?

The amount of energy a capacitor can store depends on its capacitance, which is measured in farads (F). The higher the capacitance, the more energy the capacitor can store. Capacitors can range in capacitance from picofarads (pF) to farads (F).

5. What are some common uses for capacitors?

Capacitors have a variety of uses in electronic circuits, including filtering out unwanted signals, smoothing power supplies, and storing energy for short bursts of power. They are also used in timing circuits, motor starters, and audio equipment.

Similar threads

  • Introductory Physics Homework Help
Replies
11
Views
1K
  • Introductory Physics Homework Help
Replies
6
Views
1K
  • Introductory Physics Homework Help
Replies
7
Views
721
Replies
4
Views
929
Replies
4
Views
353
  • Introductory Physics Homework Help
Replies
5
Views
216
  • Introductory Physics Homework Help
Replies
9
Views
314
  • Introductory Physics Homework Help
Replies
18
Views
1K
  • Introductory Physics Homework Help
Replies
20
Views
397
  • Introductory Physics Homework Help
Replies
6
Views
312
Back
Top