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Name:  Hemashri                                  Class:  8.2                                       Date: 18-1-18Lab Partners: Hazel Ling  (only for conducting the experiment)TITLE IntroductionIn this lab we are testing how the increase in amounts of resistors added to a series circuit will affect the current in the circuit. A resistor is an object used within a circuit so that the flow of current in the circuit is disrupted and reduced  a precise amount (“What Is a Resistor,” n.d.). So as expected, the more resistors that are added to a circuit the more overall resistance there will be. This is because, if you open  up a resistor and then scratch off the insulting paint you would see a insulating ceramic rod with copper wire wound around it.  A resistor like this is called a wire woundAs I am going to be conducting my test out in a series circuit, it means that every single charge in the circuit will have to come across every single resistor in my circuit which in turn will lower the current (“Series Circuits,” n.d.). So as I am adding my resistors one by one for each the amount of current in my circuit will be decreased for each increment. There can be different factors that can affect my data including whether or not the batteries are fully charged. Aim:               Our aim in this lab is to investigate the effect of the change in the amount of resistors used in a series circuit on the current in the circuit. I will do this by adding more resistors in each test and see what the current is then compare on how more resistance affects the current in a series circuit. Hypothesis:   I predict that the more resistors I use the less current their will be in the circuit. This is because a resistor is designed to disrupt and lower current, thus by adding more resistors into my circuit it will increase resistance which in turn lowers the current even more than the previous test. Fair Testing:      Make a table to show how you will measure/control all variables to make it a fair test.Independent variableHow will it be manipulated? (range and increment)Change in amount of resistors used in the circuit.I will manipulate it by adding one resistor each time for each round. I will start my testing by using one resistor and since I will be having 5 increments and 3 trials in each increment. In the first increment I will be using 1 resistor, in the second I will be using 2 resistors, and so on. I will measure my resistance in ohms (?)Dependent variableHow will it be measured?The current in my circuit.I will measure the current using an ammeter and record it in amps (A)Controlled variablesHow will it be kept constant? (value if applicable)Why does it need to be controlled?No. of BatteriesThis is will be kept constant by only keeping () this many batteries throughout the entire lab.It needs to be controlled as the voltage of the battery controls the flow of the current, so the larger the voltage the easier it is for the current to flow which means it will affect on how effective the resistance will be on the current.No. of BulbsThis will be constant by keeping only one light bulb throughout the entire lab.This will have to be constant as light bulbs have some resistance wires in them which means that if we add more light more the resistance increases to the previous test, which means tha lab would not be a fair test. Material of the wireI will keep it he same by using the  regular type of wires throughout the entire lab.The wires have to be constant as having in different wires could affect the lab since more wires are more conductive than othersApparatus:        A detailed list of equipment required, with a labelled 2D diagram of the set-up.Wires x4Resistors x5Multimeter x2Battery x1Light Bulb x1Method:            What you will do step-by-step (make a numbered list), explaining clearly how the independent variable will be set and controlled.  Also, clearly detail how the dependentvariable will be measured.  Should begin with “Set-up apparatus as shown in the Diagram.”First gather all required apparatus.Set-up apparatus as shown in the Diagram.Record the initial Current Add one resistor and then record the current after this in the data table.Observe the brightness of the bulb and record this as well in the qualitative column.Repeat steps 3 to 5 x2 more times for one resistor, x3 more times for two resistor, x3 more times for three resistor, x3 more times for four resistor, and x3 more times for five resistors, and record all this data in the data table. Safety Considerations: All general lab safety rules will be followed.Make sure that your circuit has a load or else there could be short circuit and could cause a fire.Data Collection:Include data tables for all quantitative and qualitative data.The table must include headings with units and the first column should be for the independent variable, while the other columns for multiple trials and the average of the dependent variable.Sample Raw Data table Amount of ResistorsCurrent/amps (A)Qualitative observationsTrial 1Trial 2Trial 347 ohm1.21 1.21 1.21 I noticed that a very small spark lasted for a short amount then disappeared 94 ohms 0.680.68 0.68 I noticed that  no light is visible 141 ohms0.120.120.12I noticed that  no light is visible188 ohms0.070.070.07I noticed that  no light is visible235 ohms0.070.070.07I noticed that  no light is visible Data Processing:  This includes three parts.1.     A new table which shows processed data (often not needed)Sample Processed Data table Amount of ResistorsAverage amount of current / (A)47 ohms1.2194 ohms0.68141 ohms0.12188 ohms0.072350.072.     Sample Calculations – Include a sample of each calculation that was done.  The sample needs to include a general equation, an equation with plugged in data, and a final answer with units.3.     Graph – Conclusion: Write a clear paragraph that:-        Fully answers the aim, fits the data, and is justified by using correct scientific reasoning (a citation is needed) by making a detailed, correct reference to the data.-        Makes a fully explained and justified comment on the strength of the relationship between the pattern discussed above and the original hypothesis. Evaluation:  this includes two parts1.     A brief evaluation paragraph that:-        Makes appropriate reference to the reliability and precision of data by comparing trials and looking at the trend (identifying anomalies where present).-        Through this, you should explain that this shows that there are uncertainties present.2.     A table that outlines the uncertainty (example below). Source of UncertaintyEffect on DataImprovement Name:  Hemashri                                  Class:  8.2                                       Date: 18-1-18Lab Partners: Hazel Ling  (only for conducting the experiment)TITLE IntroductionIn this lab we are testing how the increase in amounts of resistors added to a series circuit will affect the current in the circuit. A resistor is an object used within a circuit so that the flow of current in the circuit is disrupted and reduced  a precise amount (“What Is a Resistor,” n.d.). So as expected, the more resistors that are added to a circuit the more overall resistance there will be. This is because, if you open  up a resistor and then scratch off the insulting paint you would see a insulating ceramic rod with copper wire wound around it.  A resistor like this is called a wire woundAs I am going to be conducting my test out in a series circuit, it means that every single charge in the circuit will have to come across every single resistor in my circuit which in turn will lower the current (“Series Circuits,” n.d.). So as I am adding my resistors one by one for each the amount of current in my circuit will be decreased for each increment. There can be different factors that can affect my data including whether or not the batteries are fully charged. Aim:               Our aim in this lab is to investigate the effect of the change in the amount of resistors used in a series circuit on the current in the circuit. I will do this by adding more resistors in each test and see what the current is then compare on how more resistance affects the current in a series circuit. Hypothesis:   I predict that the more resistors I use the less current their will be in the circuit. This is because a resistor is designed to disrupt and lower current, thus by adding more resistors into my circuit it will increase resistance which in turn lowers the current even more than the previous test. Fair Testing:      Make a table to show how you will measure/control all variables to make it a fair test.Independent variableHow will it be manipulated? (range and increment)Change in amount of resistors used in the circuit.I will manipulate it by adding one resistor each time for each round. I will start my testing by using one resistor and since I will be having 5 increments and 3 trials in each increment. In the first increment I will be using 1 resistor, in the second I will be using 2 resistors, and so on. I will measure my resistance in ohms (?)Dependent variableHow will it be measured?The current in my circuit.I will measure the current using an ammeter and record it in amps (A)Controlled variablesHow will it be kept constant? (value if applicable)Why does it need to be controlled?No. of BatteriesThis is will be kept constant by only keeping () this many batteries throughout the entire lab.It needs to be controlled as the voltage of the battery controls the flow of the current, so the larger the voltage the easier it is for the current to flow which means it will affect on how effective the resistance will be on the current.No. of BulbsThis will be constant by keeping only one light bulb throughout the entire lab.This will have to be constant as light bulbs have some resistance wires in them which means that if we add more light more the resistance increases to the previous test, which means tha lab would not be a fair test. Material of the wireI will keep it he same by using the  regular type of wires throughout the entire lab.The wires have to be constant as having in different wires could affect the lab since more wires are more conductive than othersApparatus:        A detailed list of equipment required, with a labelled 2D diagram of the set-up.Wires x4Resistors x5Multimeter x2Battery x1Light Bulb x1Method:            What you will do step-by-step (make a numbered list), explaining clearly how the independent variable will be set and controlled.  Also, clearly detail how the dependentvariable will be measured.  Should begin with “Set-up apparatus as shown in the Diagram.”First gather all required apparatus.Set-up apparatus as shown in the Diagram.Record the initial Current Add one resistor and then record the current after this in the data table.Observe the brightness of the bulb and record this as well in the qualitative column.Repeat steps 3 to 5 x2 more times for one resistor, x3 more times for two resistor, x3 more times for three resistor, x3 more times for four resistor, and x3 more times for five resistors, and record all this data in the data table. Safety Considerations: All general lab safety rules will be followed.Make sure that your circuit has a load or else there could be short circuit and could cause a fire.Data Collection:Include data tables for all quantitative and qualitative data.The table must include headings with units and the first column should be for the independent variable, while the other columns for multiple trials and the average of the dependent variable.Sample Raw Data table Amount of ResistorsCurrent/amps (A)Qualitative observationsTrial 1Trial 2Trial 347 ohm1.21 1.21 1.21 I noticed that a very small spark lasted for a short amount then disappeared 94 ohms 0.680.68 0.68 I noticed that  no light is visible 141 ohms0.120.120.12I noticed that  no light is visible188 ohms0.070.070.07I noticed that  no light is visible235 ohms0.070.070.07I noticed that  no light is visible Data Processing:  This includes three parts.1.     A new table which shows processed data (often not needed)Sample Processed Data table Amount of ResistorsAverage amount of current / (A)47 ohms1.2194 ohms0.68141 ohms0.12188 ohms0.072350.072.     Sample Calculations – Include a sample of each calculation that was done.  The sample needs to include a general equation, an equation with plugged in data, and a final answer with units.3.     Graph – Conclusion: Write a clear paragraph that:-        Fully answers the aim, fits the data, and is justified by using correct scientific reasoning (a citation is needed) by making a detailed, correct reference to the data.-        Makes a fully explained and justified comment on the strength of the relationship between the pattern discussed above and the original hypothesis. Evaluation:  this includes two parts1.     A brief evaluation paragraph that:-        Makes appropriate reference to the reliability and precision of data by comparing trials and looking at the trend (identifying anomalies where present).-        Through this, you should explain that this shows that there are uncertainties present.2.     A table that outlines the uncertainty (example below). Source of UncertaintyEffect on DataImprovement

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