# lab9 - Jeffrey Trask Section A Lab 9 Resistors and...

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Jeffrey Trask Section A Lab 9: Resistors and Resistivity Purpose: The purpose of this lab is to build simple electrical circuits, to read electrical meters, and to verify Ohm’s Law and calculate resistivity. Abstract: To verify Ohm’s Law and to calculate the resistivity of Play-Doh, we built a simple electrical circuit with the electricity flowing through a Play-Doh “wire” and an ammeter and voltmeter, for measurement purposes. The wire was gradually shortened to see how the voltage and current, and therefore the resistance and resistivity, would change with the length of the wire. The color of Play-Doh was also changed to see if the content of the wire mattered. Resistance is defined as I V R = via Ohm’s Law, which states that the voltage ( V ) dissipated between two points in a conductor is proportional to the current ( I ) between these two points. Resistivity is defined as l AR = Ρ , where P is the resistivity, A is the area, and l is the length of the wire, which is the reason length matters

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lab9 - Jeffrey Trask Section A Lab 9 Resistors and...

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