This would be very easy to do, and give accurate results. Because of the length being measured to the resistance, I could find the length of the wire with the resistance of the wire, which would make my graph more effective.
Due to the effectiveness of this way, I have agreed to use the length of the wire as the factor because I think it will be most accurate and easier for me.
Prediction:
I predict that, the longer the wire is, the more resistance there will be due to more collisions between the electrons and atoms. The length of the wire should be the same as the resistance. If the wire is doubled, then so will the resistance. If the length is twice as much, then there will be twice as much collision, which would increase the resistance.
Apparatus:
· Crocodile clips
· Ammeter
· Voltmeter
· Power supply
· Ruler
· Connecting wires
· Masking tape
· Thin Constantine wire
. Nickel Chrome wire
Method:
Firstly I will get all my equipment like the crocodile clips, ammeter, voltmeter, power pack, ruler, connecting wires, masking tape, thin Constantine wire and nickel chrome wire. When I have collected all my equipment I will start to put it together like sticking the wire to the ruler then connecting the the crocodile clips to the end of the wires. Then I would connect the crocodile clips to the ammeter and voltmeter then to the pack. After everything is connected I would view everything to make sure everything is right and in its place then check for any loose wires, then that’s when I would turn on the power pack and that’s when I can record the results, and after I have completed one table of results I would repeat the same investigation to make sure everything is alright and that it turns out to be a far experiment also. By following this method it should turn out to be a successful experiment.
Conclusion:
In conclusion, I have found that my prediction was correct. I said that the resistance will increase approximately to the length, and as you can see from the results, this was correct. This is because the line of best fit is a straight line, which means the resistance is the same to the length. This proves the fact that the longer the wire is; the more collisions there are between atoms and electrons. So if the wire increases in length, so does the resistance. If the wire decreases in length, so does the resistance.
Results
This is my table of results
1ST Wire Test
I used a 12-volt battery and the name of the wire is Nichrome wire.
This is my repeated table of results with the same wire, and a voltage of 12-volts.
Evaluation:
I think by following the rules and my method and some of my predictions, then I should succeed in a successful experiment, and my evidence of this is from my results, they are very reliable because they have been repeated twice and also I have made a graph that shows the average resistance. I also think that my results will be a very reliable source of information for other people because they are very clear in what they show. Even though I think my results are good I still think there was room for improvement by having a larger variety of different wire types so you could see what results would come out of them. I think though overall I have been successful in this interesting experiment.
Analysis
Graph to show average resistance
What my graph shows
My graph shows the resistance of a wire and the length of the wire. It shows that the longer the length of the wire then the more resistance there is and the shorter the length then the less the resistance there is. As you increase the length of the wire in the experiment the more resistance will be present in the wire.
