An insulator in the shape of a spherical shell is shown in cross-section above. The insulator is defined by an inner radius a = 4.0 cm and an outer radius b = 6.0 cm and carries a total charge of Q = + 9.0 μC (1 μC = 10-6 C). (You may assume that the charge is distributed uniformly throughout the volume of the insulator). What is Ey, the y-component of the electric field at point P which is located at (x,y) = (0, -5.0 cm) as shown in the diagram?

Question

An insulator in the shape of a spherical shell is shown in cross-section above. The insulator is defined by an inner radius a = 4.0 cm and an outer radius b = 6.0 cm and carries a total charge of Q = + 9.0 μC (1 μC = 10-6 C). (You may assume that the charge is distributed uniformly throughout the volume of the insulator).  What is Ey, the y-component of the electric field at point P which is located at (x,y) = (0, -5.0 cm) as shown in the diagram?