Calculating Surface Charge Density

AI Thread Summary
To calculate the surface charge density on a copper penny given an electric field strength of 2310 N/C, the formula Surface Charge Density = Q/A is relevant. The discussion highlights the initial confusion about applying this formula to the problem. It is clarified that one can assume a constant surface charge density for the penny's surface. Additionally, the electric field of an infinite plane with constant surface charge density can be used to derive the necessary values. The problem can be solved effectively by applying these concepts.
angryshoe
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Homework Statement


The electric field strength just above one face of a copper penny is 2310 N/C.

What is the surface charge density on this face of the penny?

Homework Equations



Surface Charge Density = Q/A

The Attempt at a Solution



The only thing that I can understand is that surface charge density is equal to Q/A but that does not seem to help me with this question. What can I do for this problem?

Edit: I figured out how to do this problem.
 
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I think [/color]you are meant to assume that the surface charge density is constant. you do know how to calculate the field of an infinite plane of constant surface charge density, right?
 
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