I will stand up during the investigation to ensure that I do not injure myself if something breaks. There are possible sources of error that might have led to inconsistent results, such as a kink in the wire.
I could also consider using different cross-sectional areas of wires or Physics coursework gcse ocr change the temperature of the wires deliberately and see how manipulating these variables affect the resistance of the wire.
I have taken three reading and have worked out the average, shown in red.
There are no anomalous results that I would consider to be far away from the line of best fit. Using the same piece of wire throughout the experiment meant its temperature rose slightly over time, which may have affected my results.
This was because I could plot a graph and show the general trend. Variables There are different variables that can be changed in this experiment; these are the independent variable. I will also ensure that the wire does not heat up too much by confirming that I do not set the voltage too high on the power pack and by maintaining the same the voltage for every reading.
I will place one crocodile clip at 0cm on the wire and the other at 5cm to complete the circuit. I will also control, using the power pack, how many volts pass through the wire.
Overall, I think my method was sufficient to obtain reliable results. There are a few data points that are farther away from the line of best fit than the others, but they are still consistent with the general trend. However, due to my line of enquiry, I will only change the length of the wire.
This confirms the first part of my prediction: Also, the apparatus I had use of at school would not be suitable if I were to keep increasing the length of the wire; e. Results Below is a table of my results Table 3. In addition, I will make sure I turn the power pack off after each reading.
This would have prevented the area of the wire from remaining constant and would have affected my results. I think that the range of my results was sufficient enough for me to draw a valid conclusion about how the length of the wire affected the resistance.
Variables Safety I will ensure experimental safety by confirming that all the wires are connected properly and that none of the insulation on the wires is worn. The variables I will control will be the type of wire resistivity and the cross-sectional area of the wire. In addition, my prediction that doubling the length of the wire increases the resistance by a factor of two is correct see Table 4.
Below is a table illustrating the effect of changing the variables see Table 2: Apparatus Ensuring Accuracy To ensure accuracy I will record the voltage and the current three times every 5cm and take the average reading.2 billsimas.com GCSE GATEWAY SCIENCE CANDIDATE STYLE ANSWERS INDEX Introduction 3 Physics - Candidate A 4 Physics - Candidate B 5 billsimas.com GCSE GATEWAY SCIENCE GUIdE TO CONTROllEd ASSESSMENT INTRODUCTION TO GATEwAy CONTROLLED ASSESSMENT TASKS A controlled assessment task consists of three parts.
The task is centred on a particular idea, linked to the specification content, which follows through from Part 1 to Part 3. Apr 19, · An investigation into the resistance of a wire. Free GCSE physics coursework billsimas.coms: If you are studying the OCR Gateway GCSE Scinece course then make sure you read this specification before you start to revise.
Physics Coursework The Controlled Assessed Coursework counts for 25% of the GCSE Physics grade. There are two chances to carry out the coursework: one will relate to material covered in chapter 7; the other will relate to one of the other chapters.
Past papers archive search results for ocr physics gcse. Please note, all these 8 pdf files are located of other websites, not on billsimas.comDownload