An infinitely long cylindrical shell of radius 6.0 cm carries a uniform surface charge density σ = 12 nC/m². The electric field at r = 10 cm is approximately

Question

Quizplus · Accepted Answer

The electric field outside a cylindrical shell of uniform surface charge density is given by E = σr/2ε, where σ is the surface charge density, r is the distance from the center of the cylinder, and ε is the permittivity of free space. Plugging in the given values, we get E = (12×10^(-9) C/m^2)(0.10 m)/(2×8.85×10^(-12) F/m) ≈ 0.81 kN/C. Therefore, the best choice is D.

An Infinitely Long Cylindrical Shell of Radius 6