In order for the test to be fair I am going to have to make sure that some aspects stay the same and some are changed. I plan to change the CURRENT (AMPS) and the amount of coils wrapped around the core of the magnet. The factors which will remain the same are the voltage which I will set at 12V and the size of the iron core of the magnet.
The investigation will require me to increase the amount of coils surrounding the iron bar. 100 coils will be the number I will use but this will change throughout the experiment. I also plan to see how much weight the electromagnet will hold.
The weights which I will use are 10g each and the apparatus has been designed it will consist of a stand and clamp holding the iron core using a piece of iron I will support the weights from it.
I hypothesize that as the number of coils increases, so will the strength of the magnet. This is also true with the current. As I increase the current the magnet will become stronger. This will happen because the stronger the current passing through the individual wires, the larger the electromagnetic field created by the individual wires, these all acting on the iron core will force it to increase its magnetism.
After completion of the experiment it became obvious that I was correct this graph shows the load that any particular Amp could hold and the graph below just reinforces my hypothesis.
As you can see there is positive correlation in this graph which as you can see the more you increased the current the higher the maximum load was.
Conclusion
In conclusion I was right in my previous hypothesis. The only thing that had to change was out of my control I was informed by my teacher that realistically there wasn’t enough time to change the amount of coils therefore making the test unfair. Fortunately I feel that the experiment was a success and I gained conclusive results and finished with a plausible answer. If I could change anything I would do more experiments and change the amount of coils, this would in turn give me a wider set of results.
Scientific Explanation
The current flows threw the wires surrounding the iron core, this creates a magnetic field this is caused as each wire has its own magnetic field so when one wire is curled around the iron bar you find that the magnetic field is twice as powerful and so on and so forth. So by increasing the current flowing threw the wires you increase the strength of the magnetic field, thus allowing the electromagnet’s strength increase to lift a much heavier weight.
