P219lecture06Resistors

P219lecture06Resistors - Goal: To explore the usefulness of...

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Goal: To explore the usefulness of Resistors and to understand their applications to electronic circuits. Objectives: 1) What is a resistor and how is it useful? 2) How resistances are found or made 3) The different resistor combinations: a) In series b) In Parallel c) Hybrid 1) Learn how to calculate how much the resistors affect the flow of current. 2) Power usage by resistors.
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Why are resistors useful?
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Resistors allow us to limit the flow of current in a circuit.
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Larger conduits offer less resistance. Some materials provide better flows than others. The further something has to flow the more resistance it will encounter. So, R = ρ L / A Here ρ is not density but is a substances resistivity (which can be looked up for any substance). While there is a little dependence on temperature the resistivity mostly depends on the substance and only the substance. Examples will come in recitation.
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This note was uploaded on 12/01/2010 for the course PHYSICS 21900 taught by Professor Rhoads during the Spring '10 term at IUPUI.

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P219lecture06Resistors - Goal: To explore the usefulness of...

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