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bdubb427

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## Homework Statement

1.

A coaxial cable is given with two concentrically placed dielectrics. What is the capacitance of this structure? If an ungrounded metal shell is placed at a certain distance from the inner electrode, what will be the capacitance now? Plot the magnitude of field and potential as a function of radius in both cases.

## Homework Equations

C = Q / V = [2 * pi * epsilon * length] / [ln(b/a)] where b is the radius of the entire cable (outer and inner conductor) and a is the radius of just the inner conductor

## Homework Statement

2. A charged spherical shell is placed 1m above a ground metal plate. Find electric field.

## Homework Equations

besides coulomb's law, i don't have any other relevant equations for this.

Our textbook is really hard to understand, and the examples given in the text are even harder to follow. the book is Fundamentals of Applied Electromagnetics by Ulaby.. Any suggestions for another book are nice, but my exam is coming up and finding another book is just not an option at this point. Please help if u can. thank you...