# Consider an insulating sphere of radius 5 cm surrounded by a conducting sphere of inner radius 20 cm and outer radius 24

###### Question:

Consider an insulating sphere of radius 5 cm surrounded by a conducting sphere of inner radius 20 cm and outer radius 24 cm. Furthermore, suppose that the electric field at a point 13 cm from the center is measured to be 1600 N/C radially inward while the electric field at a point 62 cm from the center is 150 N/C radially outward. Required:
a. Find the charge on the insulating sphere.
b. Find the net charge on the conducting sphere.
c. Find the total charge on the inner surface of the hollow conducting sphere.
d. Find the total charge on the outer surface of the hollow conducting sphere.

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