• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3
4. 4
4
5. 5
5

# Investigation: Factors affecting the resistance of a wire

Extracts from this document...

Introduction

Investigation: Factors affecting the resistance of a wire Task: I will identify factors which affect the resistance of a wire and pick one to investigate in a fair test. Key Variables: The key variables in this investigation are: 1/.Thickness. In this experiment I will keep this variable constant. Throughout the experiment, the thickness of the wire will be a 24 gauge wire. 2/.Temperature. In this experiment I will keep this a constant variable as controlling the temperature of wires would be very difficult. 3/.Length. In this experiment I will vary this variable to see how it affects the resistance of the wire. 4/. Material. In this experiment of I will keep the variable of using different types of metals constant, I will be constantly using Constantine. Prediction: I predict that if the length increases then the resistance will also increase in proportion to the length. Theory: I think this because the longer the wire the more atoms and so the more likely the electrons are going to collide with the atoms. ...read more.

Middle

the conditions in which the tests are taken are all as similar as possible To make my experiment reliable, I will take several sets of results and figure out the mean average and base my graph and final results from that. Safety: To make sure the experiment is carried out in safest possible way, the apparatus will need to be switched off when not in use to make sure it doesn't over heat, and touching any apparatus that may get hot should be avoided. All loose clothing should be tucked in and long hair tied back. Results: Set One Length Of Wire(cm) Voltage (V) Current (I) Resistance(ohms) 10 0.1 0.45 0.2 20 0.2 0.44 0.5 30 0.24 0.43 0.6 40 0.35 0.41 0.9 50 0.39 0.4 1 60 0.49 0.39 1.3 70 0.52 0.37 1.4 80 0.59 0.37 1.6 90 0.68 0.35 1.9 100 0.7 0.28 2.5 Set Two Length Of Wire(cm) Voltage (V) Current (I) ...read more.

Conclusion

Evaluation I think my experiments were quite accurate as I performed them fairly and properly, this is demonstrated by the good set of results that I have gained. To try and improve my accuracy, I performed the experiment twice to get two sets of results, and could therefore find an average which would give me a better accuracy. I don't appear to have any outstanding anomalies that show up on my scatter diagram, only a minority of points don't quite fit on my line of best fit and these are quite close to it anyway. These could have been caused by the temperature of the equipment rising or my measurements being slightly inaccurate. I could have improved this experiment by performing it several more times to get a more fair average. I could have also used more accurate equipment but what I used was all that I had available to me. Another way I could have improved this investigation would have been to experiment with another thickness of wire and investigate the similarities/differences between the two. ?? ?? ?? ?? ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Electricity and Magnetism section.

## Found what you're looking for?

• Start learning 29% faster today
• 150,000+ documents available
• Just £6.99 a month

Not the one? Search for your essay title...
• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month

# Related GCSE Electricity and Magnetism essays

1. ## Factors Affecting the Efficiency of a Wind Turbine

Thermometer measured to two significant figures. Okay for measuring the temperature of air but more sensitive one is better. 3) An Oscilloscope is very accurate and very sensitive. It measures up to four significant figures. How accuracy was improved > Methods were reviewed and the best possible method was

2. ## To investigate the factors affecting current in a wire.

However, as the wire was getting longer, I did find it quite difficult to stretch it out. Accuracy and Reliability My results were reliable and accurate enough to support a firm conclusion. I think I did take enough measurements for a suitable graph and I think I did cover a wide enough range of variables.

1. ## Investigate one or more factors affecting the resistance of metal wires

By doing some preliminary work, it will be more likely that I will obtain precise evidence in my main experiment. I will carry out a preliminary experiment to find the following: * A range of values for the length of wire that should be investigated.

2. ## Discover the factors affecting resistance in a conductor.

A Power Unit: I concluded that a power unit would be the safest and most simplistic choice to use in this investigation. If two battery packs were used it would result in a lot more wiring, and much more space taken up as a result, which would mean a crowded working area.

1. ## Factors affecting Resistance of a wire

I will repeat each experiment three times to make sure that my readings are correct and that there will be no Rhode points. I will take the average of the two readings and then plot them on a graph. I have chosen this so that if I have any anomalous

2. ## An Investigation into the Factors Affecting the Resistance of a Wire.

is a constant for the material called resistivity. R is the resistance of the wire measured in Ohms. L is the length of the wire measured in metres A is the cross-sectional area measured in metres squared. ? is the Resistivity of the wire measured in Ohm-metres.

1. ## An investigation of the factors affecting the output of a transformer.

(see graph below) This is called a step up transformer because the voltage increases despite the fact that the current decreases. voltage (v) Current (a) A graph to show the relationship between voltage and current. The distance between the coils. The further magnetic fields are from their source the weaker they are.

2. ## Investigation into the factors affecting the resistance of wire

1.62 1.6 1.61 0.064183792 0.2 0.031415927 2.01639E-05 Copper 36swg 150 0.09 0.1 0.1 1.2 1.21 1.21 0.080096419 0.2 0.031415927 1.67754E-05 Copper 36swg 200 0.09 0.11 0.1 0.8 0.83 0.81 0.12282897 0.2 0.031415927 1.92939E-05 Copper 36swg 250 0.1 0.1 0.09 0.67 0.68 0.65 0.144924698 0.2 0.031415927 1.82118E-05 Copper 36swg 300 0.1

• Over 160,000 pieces
of student written work
• Annotated by
experienced teachers
• Ideas and feedback to