Formula of di electric constant
Formula of di electric constant
How effective a dielectric is at allowing a capacitor to store more charge depends on the material the dielectric is made from. Every material has a dielectric constant κ. This is the ratio of the field without the dielectric (Eo) to the net field (E) with the dielectric:
κ = Eo/E
E is always less than or equal to Eo, so the dielectric constant is greater than or equal to 1. The larger the dielectric constant, the more charge can be stored.
Completely filling the space between capacitor plates with a dielectric increases the capacitance by a factor of the dielectric constant:
C = κ Co, where Co is the capacitance with no dielectric between the plates.
For a parallel-plate capacitor containing a dielectric that completely fills the space between the plates, the capacitance is given by:
C = κ εo A / d
How effective a dielectric is at allowing a capacitor to store more charge depends on the material the dielectric is made from. Every material has a dielectric constant κ. This is the ratio of the field without the dielectric (Eo) to the net field (E) with the dielectric:
κ = Eo/E
E is always less than or equal to Eo, so the dielectric constant is greater than or equal to 1. The larger the dielectric constant, the more charge can be stored.
Completely filling the space between capacitor plates with a dielectric increases the capacitance by a factor of the dielectric constant:
C = κ Co, where Co is the capacitance with no dielectric between the plates.
For a parallel-plate capacitor containing a dielectric that completely fills the space between the plates, the capacitance is given by:
C = κ εo A / d
