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

Factors Affecting The Strength of An Electromagnet

Extracts from this document...


Factors Affecting The Strength of An Electromagnet Aim To find out the factor affecting the strength of an electromagnet when picking up paper clips. The idea was to count the paper clips that the electromagnet picked up. Predictions First of all, an electromagnet has to be defined. An electromagnet can also be called a Solenoid. An electromagnet can consist of just one wire, but usually an electromagnet is made up of wire coiled around a soft ferromagnetic core (a solenoid). This extract comes from the book ' The Working World of Physics', " Those like Iron, Nickel and Cobalt which are easily magnetised are called Ferromagnetic." Materials that only react in a very strong magnetic field are called Paramagnetic. What I think will happen is the current will flows through the wires of the solenoid and which will creates a magnetic field. By introducing more current, the magnetism will increase. ...read more.


This experiment was a fair test because: * The same power pack was used each time. * The same paper clip was used each time and they were all roughly the same weight. * Only one factor (i.e. the current) was changed. * The core of the electromagnet always had the same surface area. * The same equipment was used each time. * The pins were all made of the same material. Key Factors that could affect this experiment were: * The metal that the core is made of. * The accuracy of the amount of electricity being used. * If the paper clip I've already used are magnetised in the box. * If the core stays a permanent magnet after the electricity is turned off. Results of my Experiment My first test Current (Amps) Number of clips 0.00 0 0.10 4 0.20 6 0.30 8 0.40 12 My second test Current (Amps) Number of clips 0.00 0 0.10 0 0.20 6 0.30 9 0.40 14 My third test Current (Amps) ...read more.


Probably the reason that some of the results were anomalous was because the voltage used wasn't precisely accurate as the dials on the variable resistance can be misread slightly. Also, some of the paper clip may have become magnetised, or the nail may have become a weak permanent magnet. These reasons could also account for the spread of data in the other results. Generally, my results are confirmed in the book 'Explaining Physics': On page 289 of the book 'Explaining Physics', it says, "Experiments show that, for a solenoid of any given length, the strength of the magnetic field can be increased by increasing the current." Improvements If this experiment were used again, I would try to improve it in the following ways: * Using Iron filings or something that can give me ideal of its weight. * Taking more readings at different voltages. * Using a material for a core, which won't become a permanent magnet when the electricity is turned off. * Taking more readings at higher voltages to try and get to the point of magnetic saturation. ...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. What factors affect the strength of an electromagnet?

    because there will be not enough keys to have one per group. Plan I am going to test how my variables will influence the strength of the electromagnet. My variables will be amount of turns on the coil and the amount of current.

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

    Fair Test- When doing the experiment I must keep the factors that remain constant the same at all times. If they change then the electromagnet's performance may be hindered or increased both of which lowers the reliability of the results.

  1. Investigation into the Strength of an Electromagnet

    Section 'C' basically supports the change of direction in my predicted outcome graph, but then again makes no mention of levelling off. Evaluating Evidence Upon looking back at the actual results of my experiment I noticed one flaw in the readings I took - at 2.5A the force was remarkably high, and out of place with the straight line.

  2. Strength of an Electromagnet

    The graph increases at a steady rate in this section. The next section is includes 8 to 16 coils.

  1. What factors affect the strength of electromagnetism?

    2.00 1.00 0.95 1.01 0.99 2.50 1.46 1.39 1.42 1.42 3.00 2.10 1.99 1.76 1.95 3.50 2.66 2.41 2.49 2.52 4.00 3.00 2.75 2.63 2.79 4.50 3.20 3.34 3.43 3.32 5.00 3.57 3.79 3.61 3.66 5.50 3.76 4.11 3.87 3.91 Analysing Evidence My results agree quite well with my quantitative prediction.

  2. Physics investigation- Strength of Electromagnet

    The reason for the anomalous result may have been after the electromagnet was turned off (to give the variable resistor chance to cool down) the magnet may have retained some of the magnet strength meaning when it was turned back on the strength was more than expected.

  1. 'Investigate the factors which affect the strength of an electromagnet'

    When there is more current passing, there will be more wire or a more magnetised core. As the wire has no poles for being a magnet, the direction of the field is determined by 'the right hand rule' that which determines the direction of the field by looking at the direction of the current.

  2. Investigate the factors that affect the Strength of an Electromagnet.

    I will also make sure there is not any water or bare insulation near any electrical equipment to prevent danger of electrocution. FAIR TEST: To keep my experiment fair, I will use the same iron nail through the experiment and the second repeated experiment.

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