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Homework Statement The electric field at a distance of 0.143m from the surface of a solid insulating sphere with radius 0.381m is 1630N/C . a) Assuming the sphere's charge is uniformly distributed, what is the charge density inside it? b) Calculate the electric field inside the sphere...

Homework Statement What is the electric field at a point .12m outside the surface of an isolated plastic sphere .23m in diameter that produces an electric field of 1350 N/C just outside the surface of the sphere? Homework Equations E = kQ/(r^2) The Attempt at a Solution First I...

Homework Statement A square insulating sheet 75.0cm on a side is held horizontally. The sheet has 7.40nC of charge spread uniformly over its area. Calculate the electric field at a point 0.240mm above the center of the sheet. Homework Equations \Phi = 2EA E = \sigma / 2\epsilon The Attempt...

Homework Statement An insulating hollow sphere has inner radius a and outer radius b. Within the insulating material the volume charge density is given by ρ(r)=\alpha/r,where \alpha is a positive constant. What is the magnitude of the electric field at a distance r from the center of the...