Supercapacitors, with capacitance of 1.00F or more, are made with plates that have a spongelike structure with a very large surface area. Determine the surface area of a supercapacitor that has capacitance of 1.0F and an effective separation between the plates of d=1.0 mm
So this is what I did,
A=dc/epsilon= [1.0E-3 m (1.00F)]/8.85e-12 F/m
= 1.13e8 m^2
The answer in the back of the book is 1.0e2 km^2
If I round my answer it will be 1.0e5 km^2, so I don't know why they got that... am I using the correct formula?
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