- #1

calvert11

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## Homework Statement

Consider a conducting spherical shell with inner radius 0.8 m and outer radius 1.3 m. There is a net charge 3 μC on the shell. At its center, within the hollow cavity, there is a point charge 3 μC.

Determine the flux through the spherical Gaussian surface S, which has a radius of 0.4 m. Answer in units of N · m2/C.

a= 0.8m

b= 1.3m

q1 = q2 = 3e-6 C

## Homework Equations

Flux = E*A

E = (kQ)/r^2

A = 4pir^2

## The Attempt at a Solution

I thought I could approach this in a very straight forward way: finding E of the point charge and multiplying it by the spherical shell's surface area (using the outer radius for both r's).

So, E = (8.99e9*3e-6)/1.3^2 = 15958.6

A = 4*pi*1.3^2 = 21.237

EA = 3.389e5 N*m2/C, which is wrong. I'm not sure what I should do.