Lab #6 - Comparing Series and Parallel Circuits with Voltage and Current Name Katie Ellis Group Names Brittany McCague Luke Jacobsen Erick Romero Ortega

Lab #6 - Comparing Series and Parallel Circuits with...

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Comparing Series and Parallel Circuits with Voltage and Current Name: Katie Ellis Group Names: Brittany McCague, Luke Jacobsen, Erick Romero Ortega, Paul Trainor and Priya Senthilnathan Abstract: As a group we set up four circuits that conduct electricity through a differing amounts of resistors and resistances. Through the usage of a multimeter we were able to measure the amperage (current) and voltage (electric potential) through each resistor on differently structured circuits. The purpose of this was to determine if the experimental results of these values matched the calculated values from Ohm’s Law: I=V/R. The essence of this lab aimed to verify that equation. We were successful in the verification process as our results had very little error especially between voltage values ranging by 0.017%. Our current values had a higher error of 0.33%-6% because there was more potential for human error in measuring the current. Connecting the multimeter in series with the circuit proved a harder task than we anticipated. These error values do not apply to circuit #3 as the voltage reading of the circuit were sound, the current was way off (by 99%) and therefore yielded unacceptable results. For circuits #1, #2 and #4 we got acceptable values that verified the equation I=V/R. This is a very useful equation in the real world as electricians and engineers can use it to determine the effectiveness of a circuit weather it be wired in parallel or in series. Introduction: The purpose of this experiment is to explore and exemplify the differences in voltage and current through a circuit arranged in series and in parallel. In each circuit we could determine the amount of voltage and current running through each resistor with a multimeter. This tool has a very applicable position to the real world as it can be used to make sure any circuit system or battery is running effectively without a lot of leakage of current or voltage. It is usually used to measure the voltage of car batteries or the voltage drops in circuits within a house or wired building. To measure voltage you connect the positive terminal to the positive terminal of the battery and the negative terminal to the negative terminal of the battery. This will show how much the voltage drops across the battery and in turn gives us the voltage of the battery. The same method can be applied to measuring the voltage drop between a resistor. To measure current the multimeter has to be in series with the circuit which requires alligator clamps across the wires that direct the current into and out of a resistor. The current will flow through the wire, into the multimeter and back through the other attached wire. In this process the multimeter can read the charge per time of the current and tell the amperage of the circuit across a certain resistor. Measuring the current will allow the electrician or engineer to assess if there are any cracks or shortages within the circuit that would disrupt the current flow.
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  • Spring '15
  • Farris

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