Phys2Lab7 - current Do this about 15 times Reset the...

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Matthew Malek Lab Partners: Jon and Christina Lab #7 Ohm’s Law Objectives: To test ohms law out on many different conductors to see how was ohms law is working. Theory : The voltage across a conductor is directly proportional to the current that flowed through it. A constant proportionality would be: V = R I When solved for R: R = V / I w/ Resistance being in Volt/Amps Procedure : We begin by building the circuit and connecting the Rheostat and voltmeter, and ammeter correctly. We then set the decade box to half its max. This was about 2000 ohms. We then set the rheostat to its maximum resistance. Connect the battery and record the voltage and current that that resistance. We then moved the slider on the rheostat down slightly to increase the voltage and
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Unformatted text preview: current. Do this about 15 times. Reset the rheostat and change the resistance on the decade box to about 40 ohms. So the same as before 15 more times. Lastly, connect the light bulb to the circuit instead of the decade box. Again use the rheostat to change the voltage about 15 times and record the resistance on the bulb as well as the current in the system. Conclusion Throughout all of our experiments, the resistances of each test followed ohms law. Yes the light bulb follows ohms law. As the voltage increased the current also increased and the resistance fluxuate slightly but was mainly constant. Between 3.86 – 4.40 ohms...
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This note was uploaded on 04/17/2008 for the course PHYS 102 taught by Professor Schoonmaker during the Spring '06 term at Hudson Valley Community College.

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