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An infinite thin plane sheet has uniform surface charge density σ. What is the field magnitude?
Aσ/2ε0
Bσ/ε0
Cσ/4πε0
D2σ/ε0
Answer & Solution
Correct answer: A. σ/2ε0
A Gaussian pillbox gives E = σ/(2ε0) near a sheet, directed outward from a positive sheet.
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