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Example research essay topic: 8 And 10 Ohms 127 5 135 Voltage - 462 words

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Purpose: The purpose of this lab is to see if and how Ohms Law applies in a circuit that doesnt have a resistor. Theory: Equations Resistance = Voltage/Current R = V/I Voltage = Current Resistance V = I R Current = Voltage/Resistance I = V/R Hypothesis: I hypothesize that the resistance will be between 8 and 10 ohms. Procedures: Assemble a circuit with a multimeter, to measure the current, a voltmeter, to measure the volts, and a resistor that will provide the resistance. Next, a hand-held generator will power the circuit. Record the voltage and current while keeping the generated voltage at a constant rate. Record an estimate of the absolute uncertainty for both the voltage and the current.

Choose five target voltages. Then, graph the Voltage versus the Current to get the resistance of the light bulbs. Use uncertainty bars on your graph of Voltage versus Current to get a best fit. Data: Voltage (V) Current (A) Low, Average, High 10, 14, 18 45, 55, 65 120, 127. 5, 135 120, 135, 150 180, 187. 5, 195 180, 190, 200 Voltage = # of volts = V Current = # of amps/ 1000 = A Voltage = + or -. 1 V Current = high and low given Actual Resistance = 6. 7 Ohms Analysis: Voltage (V) Average Current (A) 14 55 127. 5 135 187. 5 190 Resistance in Ohms 7. 14 5. 45 3. 92 5. 18 4. 8 5. 26 Results: The resistance we got from the calculations was close to the actual resistance of 6. 7 ohms.

However, the 7. 14 ohms with a voltage of 0. 1 V and 3. 92 ohms for the voltage of 0. 5 ohms were not very accurate. We could have made many mistakes when doing this lab. Of course, the main error we made was when trying to keep the voltage constant using the generator we were unable to be perfect. This could have been improved had we used a motor for example, that kept the voltage at a constant rate.

It was also hard to read the measurements on for example the voltage meter. This could have been improved if we used a digital one. Conclusion: This labs purpose was to see if Ohms Law could actually be applied to a circuit board. In order to test this, we made a circuit board that had a resistor. We connected it to a voltmeter, a multimeter, and generator. My hypothesis was close, but not correct.

I hypothesized that the resistance would be between 8 and 10 ohms, but it was only about 6. 7 ohms. This lab could have been done better if we had a generator that provided a constant voltage, and if our voltmeter and multimeter were digital.


Free research essays on topics related to: circuit, voltage, 1 v, resistance, generator

Research essay sample on 8 And 10 Ohms 127 5 135 Voltage

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