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

An Investigation to Determine the Effect of the Number of Turns around the Core of an Electromagnet on its Strength.

Extracts from this document...

Introduction

An Investigation to Determine the Effect of the Number of Turns around the Core of an Electromagnet on its Strength

Aim

The aim of this investigation is to determine to what extent, if any, the number of turns on an electromagnet affects its strength.

Prediction

I predict that as the number of turns around the core increases, its strength will also increase. I believe this because of the laws surrounding the strength of electromagnets. Ampere’s Law below determines the strength (in tesla) of the magnet.

image00.png

B is in Tesla (10,000 gauss)

‘gap’ is in metres (The opening of the "C ".)

Mu = 4 * pi * 10-7

N is the number of turns in the coil

I is the current in Amps

Because only the number of turns in the coil (N) is variable in this experiment, the strength’s increase should be directly proportional to this value (if there were no turns, N=0, the equation must also = 0). To rearrange this equation:

image01.png

Preliminary Work

As preliminary work, we experimented with what number of turns and at what voltage we could obtain minimum and maximum measurable results. We discovered that with and iron nail core, the magnetic strength below twenty turns was not high enough to produce measurable results on a discrete scale such as number of paperclips.

...read more.

Middle

Length of time held in

cup / Petri dish

Type and size of c-core

Gaps between turns

Voltage of power pack

Amount/size of paperclips

Resistance of wire

Size of cup / Petri dish


Results

These are the results gathered during the two experiments, the ‘Increase’ column shows the increase in the average number of paperclips collected since the previous set of tests.

Results collected using and iron nail core

Number of Paperclips picked up

Turns

Volts

Test 1

...read more.

Conclusion

We did find that in some cases, the number of paperclips picked up may have been inaccurate because we could not ensure the paperclips were equally free to move on each test. This meant that on some tests, paperclips were catching on each other in the cup and could not be pulled out by the electromagnet. This could have been solved by using much smaller objects that had a shape so that they did not catch with each other.  Iron filings would have been ideal for the purposes of the experiment, but would have been impractical to use. The large size and weight of the paperclips also meant that very few were picked up with the iron nail at lower number of turns, which would have been solved by using something much smaller also.

In an effort to free more of the paperclips and test the limit of what the electromagnet could carry, we moved the electromagnet in the cup or dish of paperclips. Although this was in the interest of fair testing, by reducing the amount of caught paperclips not being counted, it also introduced another variable, how much the magnet was moved. This was very difficult to do accurately in the short time before we had to turn off the power for each test, and may have produced some unfair results.

...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. Marked by a teacher

    Is Sunbathing Good?

    4 star(s)

    The Quote is a reliable piece of information because it comes from the World Health Organization and they just research into the truth and rid us of the silly theories the media tend to come up with. Pg3 UV and your health...

  2. is sunbathing good for you?

    On average, just 10 minutes of using a sun bed has the same effect on the skin as 10 minutes of the Mediterranean summer sun. Due to this over 132,000 cases of malignant melanoma and two million cases of other skin cancers occur worldwide each year.

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

    The result of it is the conductor will weight lighter. The more turns of the coils there is on the electromagnet, the lighter the conductor will be. This is because as you increase the turns of the coils, there

  2. An Investigation into the Effect on the Critical Angle by Changing the Colour of ...

    * Using certain colour filters that were different thicknesses could have affected the angle of entry to the median and the critical angle because the light would have diffracted slightly differently when passing through the colour filter. This would be marginal, however.

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

    To make it more of a fair test I should keep the current exactly the same because more current can pick up more paperclips and less current will pick up fewer paperclips. I predict that the more coils we add to the electromagnet, the stronger the magnetism will be and

  2. What factors affect the strength of an electromagnet?

    of turns 2v 6v 12v 10 2mm 12mm 18mm 20 14mm 19mm 28mm 30 19mm 23mm 32mm Analysing- conclusion My results show that the more voltage there is the further distance the paperclip can jump from and also the more coils the more distance the paperclip can jump from.

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

    To also keep this experiment fair, I will only put the head of the nail in contact with the nails. I repeated each experiment 3 times so I could get a clear average. To demagnetise the nail, I connected the electromagnet to the a.c current.

  2. The aim of my experiment is to see what factors affect electromagnetism the most ...

    To create the electromagnet I will basically wrap a piece of wire around an iron nail. The diagram below explains it in a simpler form. Diagram- Ammeter Power pack :+ x amps crocodile clips Coil wrapped around the nail x amount of times.

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