Consider a parallel-plate capacitor whose (circular) plates are separated by a 3.0-mm-thick slab of glass with dielectric constant 5.0. The diameter of each plate is 4.0 cm, and the slab fills the entire volume between the plates. The electric field between the plates with the dielectric in place has magnitude 8.0 x 103 V/m. (a) Find the magnitude of the charge on either plate of the capacitor. (b) Now suppose the slab of glass is removed, leaving an air gap between the plates. Calculate the total energy stored in this capacitor and the energy density (energy per unit volume).
Consider a parallel-plate capacitor whose (circular) plates are separated by a 3.0-mm-thick slab of glass with dielectric constant 5.0. The diameter of each plate is 4.0 cm, and the slab fills the entire volume between the plates. The electric field between the plates with the dielectric in place has magnitude 8.0 x 103 V/m. (a) Find the magnitude of the charge on either plate of the capacitor. (b) Now suppose the slab of glass is removed, leaving an air gap between the plates. Calculate the total energy stored in this capacitor and the energy density (energy per unit volume).
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Transcribed Image Text:Consider a parallel-plate capacitor whose (circular) plates are separated by a 3.0-mm-thick slab
of glass with dielectric constant 5.0. The diameter of each plate is 4.0 cm, and the slab fills the
entire volume between the plates. The electric field between the plates with the dielectric in
place has magnitude 8.0 x 103 V/m.
(a) Find the magnitude of the charge on either plate of the capacitor.
(b)
Now suppose the slab of glass is removed, leaving an air gap between the plates.
Calculate the total energy stored in this capacitor and the energy density (energy per unit
volume).
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