- #1
tomizzo
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Homework Statement
Two circular disks spaced 0.50 mm apart form a parallel-plate capacitor. Transferring 1.70 ×109 electrons from one disk to the other causes the electric field strength to be 3.50 ×105N/C.
What are the diameters of the disks?
Homework Equations
Refer to attachment
The Attempt at a Solution
So I substitute everything into the formula and end up getting R = .5 mm. I then double this to find the diameter and still get the wrong answer. Any ideas?