An engineer must design a parallel-plate capacitor that will store of charge on each…
PHYSICS · Multi-part · CBSE · Physics · Electrostatic Potential and Capacitance · Electrostatic Potential and Capacitance
Problem
An engineer must design a parallel-plate capacitor that will store 2.5×10−8C of charge on each plate when it is connected to a 9.0V battery.
• The gap between the plates will be filled completely by a sheet of polyethylene (dielectric constant 2.3).
• The plate separation is fixed at 0.60mm.
Assume fringing effects are negligible.
(a) Calculate the capacitance that the engineer must achieve for the capacitor to store the specified charge at 9.0V.
(b) Determine the plate area required to obtain that capacitance. Express your answer first in m2 and then convert it to cm2.
(c) Briefly state one practical consideration the engineer should evaluate when deciding whether the calculated plate area is feasible for a compact electronic device.