A hollow metal sphere has 7cm and 11cm inner and outer radii, respectively. The surface charge density on the inside surface is -300nC/m^2. The surface charge density on the exterior surface is +300nC/m^2. A. What is the strength of the electric field at point 4 cm from the center? B. What is the direction of the electric field at point 4 cm from the center? C. What is the strength of the electric field at point 8 cm from the center? D. What is the direction of the electric field at point 8 cm from the center? E. What is the strength of the electric field at point 12 cm from the center? F. What is the direction of the electric field at point 12 cm from the center?
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