Two concentric conducting spherical shells of radii 2a and 5a exist. The inner shell has charge +Q and the outer shell has -Q. a) Find the electric field between the shells (2a

Principles of Physics: A Calculus-Based Text
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Author:Raymond A. Serway, John W. Jewett
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Chapter19: Electric Forces And Electric Fields
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Problem 28P: Three equal positive charges q are at the comers of an equilateral triangle of side a as shown in...
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Two concentric conducting spherical shells of radii 2a and 5a exist. The inner shell has charge +Q and the outer shell has -Q. a) Find the electric field between the shells (2a <r<5a) using Gauss's Law. Include the magnitude and direction in your answer.  b) Integrate the electric field to get the potential difference AV between the shells.  c) Using the result from b), calculate the capacitance.  d) What is the energy stored on the capacitor if it has a voltage V?  e) A dielectric is now inserted between the plates of dielectric constant k. What is the energy stored? 

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