Difference between revisions of "Permittivity and Permeability of Materials Obstacle Course"
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=== Permittivity of a Lossless Material From a Capacitance Measurement === | === Permittivity of a Lossless Material From a Capacitance Measurement === | ||
| + | [[File:Epsiloncap1.png |right |350px]] | ||
| − | + | # Place three samples (air, Teflon, glass) between the aligned and polished ends of two 3/8" diameter, 1/2" lengths of 6061 Al rods (as shown at right). <math>d</math> should be on the order of 1 mm. Measure the capacitances and, from the known surface area <math>A</math> and spacing <math>d</math>, determine the material's relative permittivity. <math>C = \epsilon_r \epsilon_0 \frac{A}{d}</math>. | |
| − | # Place three samples (air, Teflon, glass) between the aligned and polished ends of two 3/8" diameter, 1/2" lengths of 6061 Al rods. Measure the capacitances and from the known surface area <math>A</math> and spacing <math>d</math> determine the material's relative permittivity. | + | # How do your measured permittivity values compare to standard reference values? |
| − | <math>C = \epsilon_r \epsilon_0 \frac{A}{d}</math>. | ||
Revision as of 13:05, 16 May 2018
PAGE UNDER CONSTRUCTION
Contents
Permanent Materials
- 6061 3/8" Al rod stock
- Teflon
- Glass microscope slide
- HP Signal Generator (DC-1 GHz)
- Oscilloscope (at least 1GHz bandwidth)
- Miscellaneous electrical components
Materials to Borrow When Necessary
- Milling machine
- Lathe
Activities
Reading
- Read the Wikipedia articles on permittivity and permeability. With the help of the instructor or TA try to achieve a physical understanding of just what the permittivity and permeability mean in a bulk material.
- Read the first three sections of this paper (pages 1-27). Pay particular attention to the permittivity () / capacitance and permeability () / inductance associations.
Permittivity of a Lossless Material From a Capacitance Measurement
- Place three samples (air, Teflon, glass) between the aligned and polished ends of two 3/8" diameter, 1/2" lengths of 6061 Al rods (as shown at right). should be on the order of 1 mm. Measure the capacitances and, from the known surface area and spacing , determine the material's relative permittivity. .
- How do your measured permittivity values compare to standard reference values?
