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Unformatted text preview: alancing negative charge
will be present on the lower plate. There will be a potential energy difference (or voltage v ) between the plates
proportional to q .
d
v = A q where A is the area of the plates, d is their separation and is
the permittivity of the insulating layer ( 0 = 8.85 pF/m for a vacuum).
The quantity C = A is the capacitance and is measured in Farads (F),
d
hence q = Cv .
The current, i, is the rate of charge ﬂow, hence the
dq capacitor equation: i = qt = C dv .
dt E1.1 Analysis of Circuits (20133717) Capacitors and Inductors: 9 – 2 / 12 Types of Capacitor
9: Capacitors and Inductors • Capacitors
• Types of Capacitor
• Inductors
• Passive Components
• Series and Parallel Capacitor symbol represents the two separated
plates. Capacitor types are distinguished by
the material used as the insulator. Inductors
• Series and Parallel
Capacitors • Current/Voltage Continuity
• Average Current/Voltage
• Buck Converter
• Power and Energy
• Summary E1.1 Analysis of Circuits (20133717) Capacitors and Inductors: 9 – 3 / 12 Types of Capacitor
9: Capacitors and Inductors • Capacitors
• Types of Capacitor
• Inductors
• Passive Components
• Series an...
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 Fall '09
 Volt

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