Ohms law lab

Ohms law lab - for several resistors and recorded the data...

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Dustin Damashek Ohms Law Lab Abstract: The purpose of our lab was to prove Ohms Law. By finding the current and knowing the voltage and the resistance we should be able to prove Ohms law. In our experiment we test varying resistors, from ten million to one thousand. Because of the indirect proportion of current to resistance for every factor that we increased resistance current went down by a equal factor. V=IR is ohms law which we were trying to prove. Theory: Our goal in this lab was to prove a relationship between current, restistance and voltage. Ohms law states that V=IR therefore the product of resistance and current should equal the voltage we are putting into the system which was three volts. Procedure: The first step was to create a circuit. For this we needed a case for two 1.5 volt batteries. Then we ran one wire to the current meter. After that we ran another wire to a resistor then connected the resistor to the current meter. We then tested the current
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Unformatted text preview: for several resistors and recorded the data as seen below. Resistance (Ohms) Current (Amps) Calculated voltage (volts) Votage (3V batteryl)/ resistance 1000 3.08mA 3.08 0.003 10000 .31mA 3.1 0.0003 100000 .031mA 3.1 0.00003 120000 .0259mA 3.108V 0.000025 560000 .0053mA 2.968V 0.0000054 1000000 .0003mA 3.1V 0.000003 1000000 .00003 3V 0.0000003 Analysis: By taking the known voltage and dividing it by the known resistance we found that our measured current was very close to the actual current. We were off my a few thousands of a Amp. Because of this we concluded that Ohms law is in fact true. Our errors could have been the result of a battery that was not fully charged or if our resitors were not perfect. Also our circuit may have been not perfect. Anyone or all of these may have contributed to non perfect results....
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This note was uploaded on 04/30/2008 for the course PHYS 181 taught by Professor Visscher during the Spring '07 term at Arizona.

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