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An excess positive charge Q is uniformly distributed throughout the volume of an insulating solid sphere...

An excess positive charge Q is uniformly distributed throughout the volume of an insulating solid sphere of radius R = 5.0cm. The magnitude of the bold E with bold rightwards harpoon with barb upwards on top-field at a point 10.0cm from the center of the sphere is given to be 4.5x10^6 N/C.

a. What is the value (in units of μC) of charge Q?

b. What is the magnitude of the -field at the surface of the sphere?

c. What is the magnitude of the -field at a point 2.0cm from the center of the sphere?

d. What is the magnitude of the electric flux through a spherical Gaussian surface of radius 7.5cm surrounding the sphere?

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