However, I think that unless I had specialist equipment the results would be distorted because the wire would eventually get very hot. However, due to my line of enquiry, I will only change the length of the wire.
There are no anomalous results that I would consider to be far away from the line of best fit. I will also control, using the power pack, how many volts pass through the wire. There are possible sources of error that might have led to inconsistent results, such as a kink in the wire.
Using the same piece of wire throughout the experiment meant its temperature rose slightly over time, which may have affected my results. However, I made sure that the wire remained straight throughout the experiment.
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.
This was because I could plot a graph and show the general trend. Below is a table illustrating the effect of changing the variables see Table 2: This will reduce the chance of false readings and will cancel out any anomalous results. Overall, I think my method was sufficient to obtain reliable results.
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. I will switch off the power pack, move the crocodile clip that was at 5cm up to 10cm, and switch on the power pack.
Results Below is a table of my results Table 3. I could have considered using a new piece of wire each time in order to regulate the temperature more stringently.
Apparatus Ensuring Accuracy To ensure accuracy I will record the voltage and the current three times every 5cm and take the average reading. Variables There are different variables that can be changed in this experiment; these are the independent variable.
The variables I will control will be the type of wire resistivity and the cross-sectional area of the wire. Most of the data points were on, or very close to, the line of best fit.
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 stand up during the investigation to ensure that I do not injure myself if something breaks.
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.
In addition, I will make sure I turn the power pack off after each reading. However, using new pieces of wire each time would have been too impractical and time-consuming in the context of this lesson. I will place one crocodile clip at 0cm on the wire and the other at 5cm to complete the circuit.
I have taken three reading and have worked out the average, shown in red. To support my prediction and conclusion, I could do further experiments.
I will try to make this investigation as accurate as possible.
Again, I will record the voltmeter and ammeter readings and turn off the power pack. I will repeat this method every 5cm until I get up to cm, taking three readings from both the voltmeter and ammeter each time to ensure accuracy.
For example, I could use different types of wire instead of using only nichrome. I will then turn the power pack on and record what voltmeter and ammeter readings. This would have prevented the area of the wire from remaining constant and would have affected my results.Oct 16, · The thickness is affect in its overall diameter, simply you think about highway.
If the the highway is very wide (wider diameter, thicker the the wire), then the road simply no blocking (no resistance of car flow).Status: Resolved. Wire type/diameter Resistance (W) Copper mm W. Constantan mm W.
Constantan mm 5 W. Constantan mm W. Diagram: The things that I will measure and observe are the voltage running through the wire and the current. This will allow me to calculate the resistance of the wire.3/5(2). Resistance and thickness of wire (cross-sectional area). Compare two circuits with batteries of the same voltage, with the same length of wire, made of the same material, but one wire is thicker than the other.
The concentration gradient will be the same in both wires. Coursework Aim To find out how the length of a wire can affect resistance. Factors affecting resistance Temperature Length of wire Thickness Type Resistance is a force which opposes the flow of an electric current around a circuit so that energy is required to push the charged particles around the circuit.
Physics GCSE coursework: Resistance of wire Aim: To investigate if the length of wire affects its resistance. Prediction (Hypothesis): I predict that the longer the wire the higher the resistance, and the shorter the wire the lower the resistance. the Length of a Wire Affects Its Resistance In my physics coursework I am going to investigate the effect of the length of a wire on its resistance.
Resistance is the measure of how easy it is for current to flow through a wire. Current is the rate of flow of charge through a conductor, and it is measured in amps using an ammeter.Download