A capacitor has parallel plates of area 10 cm 2 separated by 1.8 mm. The space b
ID: 2287350 • Letter: A
Question
A capacitor has parallel plates of area 10 cm2 separated by 1.8 mm. The space between the plates is filled with polycarbonate (see the table below).
(a) Find the permittivity of polycarbonate.
________ C2/(N ? m2)
(b) Find the maximum permissible voltage across the capacitor to avoid dielectric breakdown.
______ V
(c) When the voltage equals the value found in part (b), find the surface-charge density on each plate and the induced surface-charge density on the surface of the dielectric.
on each plate ________ C/m^2
on dielectric ________ C/m^2
on each plate ________ C/m^2
on dielectric ________ C/m^2
Explanation / Answer
on each plate ___65_____ C/m^2
on dielectric _____35___ C/m^2
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