• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  4. 4
    4
  5. 5
    5
  6. 6
    6
  7. 7
    7
  8. 8
    8
  9. 9
    9
  10. 10
    10
  11. 11
    11

Investigation of electromagnetism

Extracts from this document...

Introduction

V.I.S ELECTROMAGNETISM INVESTIGATION OF ELECTROMAGNETISM CONTENTS contents 2 Aim 3 Hypothesis 4 method 5 results 7 conclusion 10 evaluation 11 AIM To find out the effect of number of turns, current and core material on the strength of an electromagnet and its behaviour towards these three points. HYPOTHESIS I think these three factors all influence the strength of electromagnets and their behaviour1: * The number of turns of wire. Because the more turns you have the more electrons are present in the wire which create a larger magnetic field. * The current flowing in the wire. Because this alters the strength of the electromagnet, and the force it is using gets bigger if the current increases. * The material the core is made of. I think a metal will be the best core material for electromagnetism, because its lattices and microscopic shape allow the current to induce the flow of the electrons and so can control the direction of flow, resulting in the build up of a magnetic field. In comparison wood has lots of different layers and shapes, so there for can not be induced. METHOD 1. Weigh and record the mass of a piece of paper which you will put on the balance. 2. Place a pile of iron filings on another piece of scrap paper. ...read more.

Middle

I want to keep these the same because they are not my testing variables. The altering variables are going to be the voltage on the power pack and so obviously the ammeter reading on the ammeter. The responding variable is the amount of filings picked up in grams. The type of core material that makes the best electromagnet, this experiment is to analyse the effect of material on electromagnetism. The number of turns will be 25* It will include a one cell power battery. The cores will be altered. Again the above applies for the continuation of the experiment. The cores include: iron, no core, steel, copper, brass and wood. The constant variables will be the wire and the turns of wire around the magnet as well as the voltage supplied by the battery. These are kept the same as to not influence the testing variable, which is to analyse how the core material affects electromagnetism. The responding variable will be the amount of filings picked up. This will all be recorded in a table as shown below. RESULTS Investigating the number of turns on the strength of the electromagnet Number of turns Mass of filings (g) 1 0.1 2 0.4 5 1.56 10 7.47 15 24.4 20 28.8 Investigating the effect of current on electromagnetic strength Current (amps) ...read more.

Conclusion

I think this aspect is the hardest to handle equally. It also interferes most with the results if something goes wrong. Looking at the results it is very clear what they show. By this I mean that the line of best fit shows a very strong correlation between the densities of the points. This indicates that the results were rather accurate. I was not very happy with the result of the core material. I was expecting iron and not steel to be the best core material. This is because from all materials iron has the best shape for inducing electrons and persuading them to flow in a direction. This was probably due to experimental failures. Other aspects I could investigate are temperature and how it influences magnetism. You could also look into the shapes of the materials. I think this aspect also affected our experiment. Because we had used different shapes for different materials, for each experiment. A larger area of material would have a stronger magnetic field, as it has a bigger surface area and so would have a stronger magnetic field. Generally I think it was an interesting experiment to do, and I also had enjoyed analysing the aspects of electromagnetism. 1 E.g. If the iron filings still fall off, after the circuit has been switched off. ?? (footnote continued) 2 11 ...read more.

The above preview is unformatted text

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

    From the other side of the ammeter I will use another wire to connect the ammeter to the solenoid. This solenoid will have an iron nail through it so as to create the electromagnet. On the opposite end of the solenoid a wire will connect it to the right side of the power pack thus completing the circuit.

  2. What factors affect the strength of an electromagnet?

    I have drawn graphs to show my results which will make it easier to see the dissimilarity and also to compare them. Here are my graphs With the first and second test I can see that they are nearly the same and don't have much difference between them.

  1. Investigation into the Strength of an Electromagnet

    My apparatus included an accurate ammeter that measured current to .01 of an Amp, and using my skill I was able to manipulate the variable resistor to my satisfaction, thus I was able to obtain the exact desired current. I am pretty certain that anyone who followed my method would

  2. What factors affect the strength of electromagnetism?

    This is because the magnetic domains of the metal atoms can exert magnetic fields only up to a maximum strength when all of them are aligned with the field, irrespective of whether the current is increased further.

  1. Physics investigation- Strength of Electromagnet

    The use of a safety pack means another fuse. The power pack also has a reset button which pops out when the current is too great. We found from the preliminary work that it is safer if after every recording we will turn the circuit off at the power pack

  2. An Investigation to Determine the Effect of the Number of Turns around the Core ...

    1 power pack 2 power pack cables 2 crocodile clips 1 Petri dish Paperclips (at least 200) 1 paper cup Diagram Method Firstly the iron nail was taken and wrapped with twenty turns of thin insulated wire, each end of which was attached to a power pack via crocodile clips.

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