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To see which different factors affect the strength of an electromagnet

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Michael White 11LOctober 2001

GCSE Science 1

Physics Two

Aim: The aim of this experiment is to see which different factors affect the strength of an electromagnet, which is made out of an iron bar, and a coil of wire.

For this experiment, there are a number of different factors that could affect the strength of an electromagnet. I have narrowed it down to a few that could be chosen. The possible factors that I could choose from are:

  • Number of coils on the wire.
  • Strength of the current.
  • Material that is used.

I believe that these are the most common factors that will affect the strength of the magnet. The factor we are going to investigate is the current. This is because it

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3. Do the experiment three times.

4. Clear away experiment.


Power supply





It is important to ensure that safety is considered in an experiment like this.  Electricity is being used, so there should be no water around and the pupils should have dry hands. The power supply should be set at a low level, with bags packed under the table. Everything should be cleared off the desk, and the teacher should check that the circuit is set up properly before letting the experiment commence. As soon as the experiment is completed, the pupils should turn of the power supply and pack away. I will make sure all wires are properly connected.


I predict that as the current increases, so will the electromagnetic fields.

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I made sure that my results were accurate by using the same equipment each time. This meant that any faults would be the same on each experiment. We made sure that everything on each attempt was exactly the same.

To extend upon the experiment that I have completed, I think that I could have done all of the factors which affect electromagnetism. I would have then had a broader range of results from which I could analyse.

...read more.

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