AST 406 Conductors
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The document discusses conductors, semiconductors, and insulators. It defines conductors as substances that allow free flow of electrical charges, like metal wires and graphite rods. Semiconductors have conductivity between conductors and insulators, allowing some control of charge flow. Insulators do not allow charge flow and include materials like plastic, wood, and glass. The document discusses factors that affect conductance, including length, diameter, temperature, and material of a wire. Copper is identified as the best conducting material.
AST 406 Conductors
- 1. Conductors
- 2. Charging Charging an object consists in creating an imbalance on the electrical charge of that object. What are some examples? Electrolytic Solutions pg 142
- 3. Conductors Substance that allows free flow of electrical charges to pass Ex. Metal wires (ex. copper) Graphite rods
- 4. Semi-conductors Substance that has an electrical conductivity between that of a conductor and insulator. This allows it to control the amount and direction of the flow.
- 5. Insulators Substance that does NOT allow free flow of electrical charges to pass Ex. Plastic, Wood, Paper, Rubber, Glass, Ceramics
- 6. Water is NOT a good conductor Nichrome is a POOR conductor used in resistors, toasters, radiators…
- 7. Conductance (G): Is a number that tells you how well electrical current flows Characteristic property Measured in Seimens “S” Conductors have HIGH conductance Insulator have LOW conductance
- 8. Conductance of a wire depends on: Length Diameter Temp Material Copper is the BEST Metals better than non-metals
- 9. Which is a better conductor? Plastic Wood Copper Iron SHORT FAT COLD Which metal wire has the best conductance?
- 10. Which wire is the best conductor? Wood 55 C o SHORT FAT COLD Copper 25 C o Copper 25 C o Copper 55 C o Aluminum 25 C o Copper 5C o
- 11. Copper is the best conductor Wires that are: SHORT FAT COLD have a high conductance Nichrome is the best resistor
- 13. Alternative Educational Experiences through e-Learning