Science · 6 pages · 12 min
How a capacitor stores charge
Two conductors, separated by an insulator, hold equal and opposite charge with energy in the field.
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From the opening
A capacitor stores charge by holding equal and opposite amounts on two conductors separated by an insulator. The energy sits in the electric field between them, and it stays after the charging source is disconnected, until a path lets the charges recombine. The opening covers opposite charges on two plates, energy stored in the field, and why direct current eventually stops.
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Inside
- Opposite charges on two plates
- Energy stored in the field
- Why direct current eventually stops
- The Leyden jar's glass and foil
- Where the idea stops applying
- A distinction worth keeping
Sources
- Capacitance of conductors separated by an insulator
- The Leyden jar as an early capacitor