- #1

tomrja

- 18

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## Homework Statement

A metal sphere of radius a is surrounded by a metal shell of inner radius b and outer radius R, as shown in the diagram below. The flux through a spherical Gaussian surface located between a and b is 1.20Q/εo and the flux through a spherical Gaussian surface just outside R is 0.80Q/εo.

a) What is the total charge on the inner sphere? (Express your answer as a multiple of Q. For example, if the total charge is 0.2Q, then input 0.2).

b) What is the surface charge density of the inner sphere? (Express your answer as a multiple of Q/a2.)

c) What is the total charge on the inner surface of the outer sphere? (Express your answer as a multiple of Q.)

d) What is the surface charge density of the outer surface of the outer sphere? (Express your answer as a multiple of Q/R2.)

## Homework Equations

[tex]\phi[/tex]= integral(E dot dA)= Qenclosed/epsilon not

## The Attempt at a Solution

I tried to find the charge enclosed but no charges were given. I don't know how the flux between a and b and the flux through a spherical Gaussian surface come into play. Thanks for your help!