Dielectrics within Capacitance
Storyboard
Both to keep the capacitor plates separate and to increase their capacity, dielectrics are placed between the two plates. When the capacitor is charged, an electric field is generated between the plates that polarizes the dielectric molecules. This acts as a system of multiple capacitors connected in series which is equivalent to increasing the section and with it the capacity.
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Capacity
Equation
Si se define una superficie que pasa entre las placas y rodea la carga
$E_dS=\displaystyle\frac{Q}{\epsilon\epsilon_0}$
\\n\\ncon
$\Delta\varphi = \displaystyle\frac{\sigma}{\epsilon\epsilon_0}d=E_dd=\displaystyle\frac{Q}{\epsilon\epsilon_0}\displaystyle\frac{d}{S}$
\\n\\nse obtiene con la definición\\n\\n
$\Delta\varphi=\displaystyle\frac{Q}{C}$
que la capacidad de dos placas se puede calcular con
$ C = \epsilon_0 \epsilon \displaystyle\frac{ S }{ d }$ |
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Video
Video: Dielectrics within capacitances