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Course: Electromagnetism (Essentials) - Class 12th > Unit 3

Lesson 6: Applying Gauss's law - an easier way to find electric fields
Science
Electromagnetism (Essentials) - Class 12th
Maxwell's first equation - an alternative to Coulomb's law
Applying Gauss's law - an easier way to find electric fields
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Applications of Gauss's law (basic)

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Problem

The electric field at a distance of 1.5 m from an infinite charged sheet is of magnitude, |E|=105 NC−1, directed normally toward the sheet.
What is the surface charge density, σ, of the charged sheet?
σ=
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi
×10−6 Cm−2