- #1
itzernie
- 23
- 4
Homework Statement
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A thin, horizontal, 11-cm-diameter copper plate is charged to 4.3 nC . Assume that the electrons are uniformly distributed on the surface. What is the strength of the electric field 0.1 mm above the center of the top surface of the plate?
Homework Equations
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E= n/(e0)
n = Q/A
E = Q/(2Ae0)
Q = 4.3 E -9
e0 = 8.85 E-12
A = π(.055)^2 = 9.5 E -3
The Attempt at a Solution
I tried plugging in the info provided to solve for E. I placed a 2 in the denominator since the problem is only dealing with one plate instead of 2. by doing so I get 25572.41 or 2.6 E 4 since the problems calls for 2 sig figs. This number does not include the 1mm distance from the surface which is what i am confused on. I tried multiplying by 1 E-3 but that did not work