• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

What factors affect the strength of an electromagnet?

Extracts from this document...


Davinder Singh Poonia 10/1

What factors affect the strength of an electromagnet?


I will be testing the factors which will make an electromagnet stronger.  When insulated wire is wrapped round an iron nail and the ends of the wire are connected to a battery the nail becomes capable of picking up iron filings and paper clips. This is called an electromagnet. The nail is magnetised by the current in the wire. If the battery is disconnected then the iron clips will fall off. This is because most of the magnetism has been lost.  The passage of an electric current along a wire creates a magnetic field around the wire. The fields are in the shape of a series of concentric rings. The more coils used in the electromagnet, the stronger the magnet is. If there is one coil, and another is added, then the two coils have twice the strength of one. This is because the current going through the wire makes the soft-iron core is the factor that induces electromagnetism, as so when there is more current, there will be more wire or a more magnetised core. Electromagnets are magnets which are created and are easily controlled by electricity. All magnets have a region of space around

...read more.



To keep this a fair test I will use the same wire as it will have the same amount of resistance. I will also use the same paperclip as other paperclips could be slightly charged.  The same power supply will be used as some power supplies give out different voltage even if the difference is small.  

Because my variables will be the same, I can expect my results to be of suitable accuracy.  I think that these steps are reliable and anyone, anywhere, anytime can carry this experiment out following my steps and I am confident that they will get similar results but there might be a slight difference because of the equipment is different.   I think that the variable which will have the biggest influence on how strong my electromagnet is will be the coils and the number of turns.  I predict this because the bigger the range of the magnetic field the more distance the paperclip can be picked from.  


To find out what factors affect the strength of an electro magnet.


We got a power supply and connected an insulated copper wire to it. We coiled the wire around an iron nail.  We coiled the wire different amounts of times and different voltages.  We

...read more.



This experiment has worked well and has produced sufficient results that produced an accurate conclusion. I did not have any unusual and anomalous results.  However, the methods used were not in such way that gives the most reliable results, as, the coils were not done in exactly the same way, so the length of the coils inside the magnetic field is not precisely the same in all cases.  A mechanical device could be utilized instead of doing it by hand. The results, however, are not strictly and totally accurate, as the circuit itself is not 100% efficient.  The resistance inside the wires drains up some of the energy. Although I got accurate conclusion and I have backed it with scientific knowledge and I got reliable results I could have still done better. If I had to do the experiment again I would try my very best to make the coils the same and they are equally apart from another and also I would put in ammeter to get a precise reading of the current going in. This would not change my results but it will give me precise readings which will make my experiment more accurate then jus saying 2v, 6v, 12v when some of it is being decreased by resistance. I think I have carried out a fair trial.

Science 1                                                                                               Page  of

...read more.

This student written piece of work is one of many that can be found in our GCSE Waves 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

See related essaysSee related essays

Related GCSE Waves essays

  1. Peer reviewed

    How does the number of coils on an electromagnet affect its strength?

    4 star(s)

    When 30 coils were wrapped around the iron nail, 42 paperclips were magnetised, but when 35 coils were wrapped around the iron nail, the number of paperclips supported dropped to 36. The method of spacing the coils out evenly along the iron nail only became apparent in the reiteration of the investigation.

  2. To investigate how the strength of an electromagnet change as you varies the number ...

    Also we have used the different wires, which may causes anomalous. We can also use another experiment to draw out the same conclusion as above, which is using the same method of increasing the turns of the coils, but instead of measuring the maximum weight, we put the conductor on

  1. How Does the Number of Coils On An Electromagnet Affect Its Strength?

    Here we can see all 3 experiments and the average put together. Conclusion My conclusion is that the amount of coils does affect the amount of paperclips picked up. This is shown by the average shown in a graph, which is a straight line.

  2. To Plan and perform an investigation to show how the strength of magnetism in ...

    8.37 80 10.65 10.60 10.63 Conclusion There was a pattern in our results as the Coils increased the weight of iron filings got bigger at 20 coils the electromagnet was weak and only picked up 2.10 grams of iron fillings.

  1. Our aim for this experiment is to find out a method of increasing the ...

    To make my test fair and safe I will always use the same nail because some nails are bigger or smaller than others so some will pick up more paperclips than others, I will also use the same piece of wire because some wires can have extra copper wires than others causing more or extra paperclips being picked up.

  2. Investigation of electromagnetism

    Because then the amount of electrons present is greater. There for they create a larger magnetic field and produce a stronger electromagnet. Current flowing in the wire: again looking at the results I can see a proportional line indicating that the higher the current flowing through the wire the better the electromagnet is.

  1. Measure how the number of coils of insulated wire around the iron nail effects ...

    I will repeat each experiment three times so I can work out a clear average and also make sure that previous results are not flawed in some way.

  2. Investigating the factors which affect the sideways displacement of a light ray through a ...

    d (mm) 30 12 32 12 =2.67 60 32 1:2.67 I (degrees) d (mm) 40 18 50 =2.78 18 80 50 1:2.78 We can see that as the difference between the angles increases by 10 degrees, the ratio of the distances becomes bigger by 0.1.

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