(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

see attachment/picture

im having problems with fields inside matter. i get the left side of gaussian surfaces/ampere loops. but for example this first equation's right side i cant understand.

3. The attempt at a solution

i would think the right side should be

[itex]I[/itex]

since its the total enclosed current by my ampere loop

but the book says

[itex]I\frac{\pi s^2}{\pi R^2}[/itex]

it has something to do with the dependence of the current enclosed and the distance, which you dont have outside the cylinder. but i cant figure it out. can someone explain?

1. The problem statement, all variables and given/known data

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# Problems with electromagnetic fields inside matter

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