ohms law - Ohm's Law Lab 1 Cycle 1 Physics 202 Lab M 7-9...

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Ohm’s Law Lab 1 Cycle 1 Physics 202 Lab M 7-9 February 5, 2007 Abstract In order to study the relationship between the electrical current flowing though a circuit element and the voltage applied, we used a variety of resistors to change the current. With the addition of different resistors, we were able to detect the voltage drop across our circuit and determine the correlation between the voltage and amps. In doing so, we determined that the resistors caused a linear relationship between the amps and voltage due to the fact that they obeyed Ohm’s law which says that voltage equals resistance multiplied by the current. The automotive bulb created an exponential curve which shows that it did not obey Ohm’s Law. Introduction
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Georg Simon Ohm discovered in 1827 that at constant temperature, the current I is directly proportional to the potential difference V , and is also proportional to the resistance R , giving the equation I = V / R . Ohm’s Law states that the current that flows through a conductor is directly proportional to the potential difference between its ends. It is usually shown as V = IR, where V is the voltage, I is the current, and R is the resistance of the conductor. A real life application of ohms law is when the current of a battery can push through a wire or the water flow that can be pushed through a pipe. Figure 1: Diagram of Apparatus; voltmeter, ammeter, resistor, and power supply. Procedure In order to begin the lab we had to set up a circuit to test the amps and voltage. It was very important to make sure that the power supply was off, prior to setting the lab up. We began the circuit from the positive side of the power supply and ran a wire to a
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This note was uploaded on 04/27/2008 for the course PHYS 101L/102L taught by Professor Johnson during the Spring '08 term at South Carolina.

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ohms law - Ohm's Law Lab 1 Cycle 1 Physics 202 Lab M 7-9...

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