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Title Resistors in Series and Parallel Date 17705 Aim The aim of this experiment is to compare the predicted and actual resistance in a circuit of resistor combinations in series and in parallel Background A resistor is an electrical componentdevice that has electrical resistance Resistors can be used in electric circuits for protection of components voltage division or current control In an ideal resistor the resistance remains constant regardless of the applied voltage or current or the rate of change in the current Resistor 2005 Wikipedia Electrical resistance is a measure of the ability of an object to oppose the passage of an electric current The electrical resistance of an electrical component can be found by using Ohms law Ohms law states that the potential difference voltage between the ends of a conductor eg a resistor and the current flowing through the conductor are proportional at a given temperature Storen Martine 2000 p221-226 This law can be written as RV I The SI unit used for electrical resistance is an ohm An electrical device that has an electrical resistance of 1 ohm will cause a current of 1 amp to flow through it if a voltage of 1V is passed through it From previous scientific research it has been determined that the general law for resistors in series is Rseries R1 R2 R3Rn It has also been determined that the general law for resistors in parallel is Rparallel Hypothesis From the formulas stated in the Background of this report it can be seen that the total resistance of resistors in series can be found by adding together the individual resistances of each component It can also be seen that the total resistance of resistors in parallel can be found by adding together the individual reciprocals of each components resistance and then taking the reciprocal Predictions By knowing the individual
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