Checking if Drawing is Correct: Charge Enclosed & Radius

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SUMMARY

The discussion focuses on verifying the correctness of a diagram related to electric charge and radius in a spherical shell context. The user confirms that with a radius of 1cm, the charge enclosed is -10mC. However, there is confusion regarding the calculation for a radius of 3cm, where the user questions the inclusion of an additional 5mC charge from the spherical shell, which has a total charge of 5mC. The key takeaway is the need for clarity in charge distribution and the impact of radius on enclosed charge calculations.

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Homework Statement
A solid conducting sphere of radius 2 cm has a charge of -10 mC. Concentric With
the sphere is a conducting spherical shell with an inner radius of 4 cm, an outer
radius of 6 cm, and a charge of +5 mC.
(i) Determine the net charge enclosed by a concentric spherical Gaussian surface
when its radius is 1 cm, 3 cm, 5 cm and 7 cm. Explain your answers.
(ii) Find the magnitude and direction of the electric field measured at a point of
radial distance 7 cm away from the centre of the solid conducting sphere.
Relevant Equations
-
Firstly, I would like to check if I drew the diagram correctly:
1580372026021.png

I'm unsure of the question's phrasing in this case.
Should if the drawing is correct,
(i)
When radius is 1cm, charge enclosed = -10mC

When radius is 3cm, charge enclosed is -10+10 +5? I'm unsure where the 5mC is here in this case.
Thanks.
 

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The spherical shell has a charge of 5mC.
 

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