(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A science-fair radio uses a homemade capacitor made of two 45 45 sheets of aluminum foil separated by a 0.30-mm-thick sheet of paper. Assume dielectric constant of paper is 3.0.

What is its capacitance?

2. Relevant equations

C=k e0 A / d

3. The attempt at a solution

I'm not sure if this is the wrong formula or if I am supposed to double .45m since there are two plates. Anyways, I came up with this...

(3.0) * (8.85*e-12) * (.45) / .0003

But the answer I came up with is wrong. Can anyone steer me in the right direction?

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# Homework Help: Finding the capacitance

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