Capacitance
Capacitance
Note: for the capacitor component, see: Capacitor.
Capacitance is how much electrical energy a capacitor can store, the permitivite base multiplied by permitive relative multiplie par (surface divise distance entre plate)
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Capacitance is measured in the Farad unit .
Capacitance formula: C = Q÷V
EO Er (A/D)
Applying voltage over 2 plates creates an electric field. Positive charge collect on 1 plate and negative charges on the other.
Capacitance formula: C = Q/V is the ratio of the positive/negative charge 'Q' per conductor to the voltage 'V' between.
Formulae
Formulae
Capacitance formula: C = Q÷V
Parallel-plate capacitor formula: C = κϵ0A/d
[7] C = ξ0ξR (A/d)
C = capacitance (in farads)
ε₀ = free space permittivity (~8.85 x 10⁻¹² F/m)
εr = a dielectric material's relative permittivity between plates (dimensionless) (e.g. mica's relative permittivity = 5.5)
κ (Greek letter kappa) = dielectric constant of mica (~5.4)
A = 1 plate's area (in square meters).
d = distance between plates (in meters) or dielectric thickness
Capacitance conversion
Capacitance conversion
Total capacitance (CT)
Total capacitance (CT)
Note: Parallel and series resistances total values are found in opposite ways of resistances.
Total capacitance in series = reciprocal of sum of reciprocal of capacitance values:
1/(C1⁻¹ + C2⁻¹ + C3⁻¹ + C4⁻¹ + ...) = CT
Total parallel capacitance = sum of values: C1 + C2 + C3 + C4 +.... = CT
Rules
Rules
If a capacitor's plate area increases, it scapacitance increases.
If distance between a capacitor's plates increase, capacitance decrease.
Series CT is less than any individual capacitance values.
Resistance are often big values, inductors are often small values, capacitance values are often mediums.
[1] 3 ways to rise a capacitor's capacitance:
Increase plates' sizes
Move plates closer together
Make the dielectric as good an insulator as possible.
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