A hollow metal sphere has 5.0 cm and 9.0 cm inner and outer radii, respectively. The surface charge density on the inside surface is -85 nC/m2. The surface charge density on the exterior surface is +85 nC/m2. What is the strength of the electric field 2.3 cm from the center?

Question

fifciol · Answer

2.3 cm is inside the sphere. Due to Gauss's law if there is no charge inside that sphere with radius 2.3 there is no electric field.