Electric Charges & Fields
Class 12 · Electric Charges & Fields

Infinite Plane Sheet

Uniform E = σ/2ε₀ — independent of distance from sheet.

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Key Notes

01

Field of an infinite charged sheet is uniform, perpendicular to the sheet, and independent of distance.

02

On both sides of an isolated sheet, E = σ/(2ε₀) outward.

03

Between two oppositely charged parallel sheets, fields add: E_inside = σ/ε₀.

Formulas

Single sheet

Both sides; field uniform and outward.

Between two opposite sheets

Outside both: E = 0.

Important Points

Sheet field is independent of distance — works only because sheet is infinite. Real plates show this only at distances ≪ plate dimensions.

Conductor sheet (one face): E = σ/ε₀ outside.

Infinite Plane Sheet notes from sciphylab (also known as SciPhy, SciPhy Lab, SciPhy Labs, Physics Lab). Class 12 physics revision for JEE Mains, JEE Advanced, NEET UG, AP Physics 1/2/C, SAT, and CUET-UG.