Question

The electric field strength Eo is measured at a perpendicular distance R from an infinitely large, thin shee that contains a uniform positive charge density ơ In terms of the stated properties and the permittivity of free space o write an expression for the electric field strength E at a perpendicular distance 2R from the sheet. Using this result, by what proportion does the electric ficld change as a test instrument moves from the distance 4R to 13? O 134 O (134)2 O (4/13)2 O 4/13

Answer 1

The electric field due to the infinity long thin sheet carrying uniform charge density σ is independent of of distance from the sheet.

1. The expression for field at distance 2R is given by :

E = σ/2ε_o

2. As we can see the expression is independent of distance so the E.F. at 4R and 13 R will be same so the proportion of E.F. will be 1 .