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

Producing an electromagnet.

Extracts from this document...

Introduction

Duncan Howells

Science Investigation:

Plan

In order to produce an electromagnet you need to have a soft iron core and wire. You need to coil the wire around the iron core and pass a current through the wire to get a magnet.

You can vary the strength of this magnet in a number of ways:

  • Change the number of turns on the coil
  • Alter the size of the current
  • Alter the size of the iron core
  • Change the shape of the iron core
  • Change the material of the core
  • Change the ways in which the coils are wrapped around the core
  • Change the nearby magnetic fields

To find out how the electromagnet is affected when the variables above are changed I will take one of the variables and record how the magnet is affected by it’s change. I will not change any of the other variables to ensure I’m carrying out a fair test.

I have decided to vary the current passed through the electromagnet. I shall do this by using a variable resistor in the circuit and by altering the voltage from the power supply. I will vary the current over a range of 5 Amps (0 – 5A).

...read more.

Middle

88.8

3

290

By doing these preliminary results I determined that I will defiantly be using a wider range of results in the proper experiment (current 0-5A). I also determined that the number of coils I used (30) was suitable for the experiment. I also learned the best way of doing the experiment so I get the most accurate results.

Proper experiment results 1

Note: Iron nail weighs 13.4g

...read more.

Conclusion

I think that the method I used was on the whole a good, efficient and reliable one. I think this because my results were quite accurate. I don’t believe that there was anything I could change to make the method any more accurate.

If I had more time to continue my investigation I could carry out some extra work to further it.

I could do another experiment which uses a similar method to demonstrate the effect on the magnetic field around a wire whilst a current is flowing through it.

A wire is coiled round an iron nail as before and set up in a circuit much similar to the one I used. A current is then passed through the circuit and wire, magnetising the nail. I would then place the nail over a pile of iron filings and the filings should stick to the nail. I would vary the current and the number of coils and see how the amount of filings attracted to the nail varies when the aforementioned factors are changed. This should give me a good idea of how the current and magnetic field around that current are directly proportional.

...read more.

This student written piece of work is one of many that can be found in our AS and A Level Electrical & Thermal Physics 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 AS and A Level Electrical & Thermal Physics essays

  1. resistivity if a nichrome wire

    I then got the following results: Maximum gradient: 9.3 ? / 0.575 = 16.2 ? m-1 Minimum gradient: 9 ? / 0.626m = 14.4 ? m-1 I will now work out the percentage error for the gradient of the graph resistance against gradient.

  2. Investigate the relationship between electromagnet strength and amount of current flowing through the wire.

    This is exactly what I expected from my hypothesis. However, I also predicted that the full graph would be an S-shaped curve. The graph showing my results only shows the first part of the S-shaped curve because the current was not high enough to line up all the magnetic domains up to completely magnetise the magnetically soft iron core.

  1. Free essay

    Resistance of a wire

    ruler * Micrometer * Ammeter * Voltmeter METHOD On the wooden plank, place the meter ruler and measure as accurate as possible from 0-50cm in increments of 5cm.

  2. In this experiment I intend to find out what affect the amount of turns ...

    Plan To carry out the experiment I will create a series circuit in which an electromagnet can be set up with a varying number of turns in its coil. From this I will measure its strength by testing how much weight it can hold suspended magnetically.

  1. Test whether changing a certain variable in an electromagnet circuit (either the coils around ...

    * Test that the electromagnet works by turning the power pack on and seeing if it attracts the paperclips. * Change the variable you have chosen e.g. the current (increase and decrease) by turning the central dial on the power pack.

  2. The strength of an electromagnet.

    In a non-magnetized piece of iron the domains point in random directions, and there is overall no magnetic field. A non-magnetized piece of iron would look like this: You can see that all the domains point in different directions. Using the current in the coils, you would be able to

  1. Investigating the factors affecting the size of current flowing through a length of resistivity ...

    This means that because it is going to hit twice as many carbon atoms it will be twice as hard and so take twice as long for the electrons to travel from one end of the putty to the other.

  2. Investigating the electromagnet using various amount of current.

    This is similar to what happens when an electromagnet is formed. Preliminary experiments; I did some preliminary experiments so that I could find out the range of the current, and how much voltage was needed in the experiment, and also exactly how far the electromagnet should be away from the iron bar.

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