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

How Different Amplitudes Affect the Strength of an Electro Magnet.

Extracts from this document...

Introduction

Daryl Breakwell                           11KR                          Physics Coursework

How Different Amplitudes Affect the Strength of an Electro Magnet

Planning

Diagram

Equipment List

2 Iron ‘C’ cores

Boss stand and clamp

Variable Voltage Power Supply (VVPS/Power Pack)

Ammeter

Wire

Method

I will measure the current using an ammeter, as the voltage is to small to measure, and the amplitude (current) is whole numbers. To measure the strength of the electro magnet I will hold it in a boss stand and clamp. I will then add 100g weights until the iron core the magnet is not strong enough and breaks its link with the core. I will have eight coils on the magnet, as any more and it would be to strong. I will repeat do the experiment at 0.0, 0.2, 0.4, 0.6, 0.8, 1.0 amps. I will then repeat it 3 times and take an average of my results and plot them on a graph.

Factors to vary, control or take into account

In my experiment, I could vary several things such as: the amplitude (current), the voltage, the amount of coils on the magnet, the size of the core or the type of wire used. To make it a fair test I will use the same equipment, keep everything the same, apart from the varying factor.

...read more.

Middle

Current (Amps)

Mass 1 (g)

Mass 2 (g)

Mass 3 (g)

Average (g)

0.0

0

0

0

0

0.2

0

0

0

0

0.4

100

100

200

133.33

0.6

100

200

200

166.66

0.8

200

200

200

200

1.0

200

200

400

266.66

The results in red I think are anomalous results so did them again and put then into the table again. The results in blue are the averages; they have been affected by the anomalous results so I will have to work tem out again.

...read more.

Conclusion

My results were as I expected them to be, once I had repeated the anomalous ones. I think my results are good enough to make a firm conclusion.

Problems

I could have used smaller mass weights instead of 100g weights, this would have given me more accurate results as I could have found how many I would hold to the nearest gram, this would also make the results differ more as there would be less grams so it might hold a slightly different amount each time .The only problem is that the school did not have 1 gram weights and it would have taken a lot longer to get the results.

Improvements

If I had more time I would take some more results after 1.0 amps to see if I have actually reached the magnets full capacity, to do this I would take readings from: 1.2, 1.4, 1.6, 1.8, and 2.0 Amps.

I would also retake 0.2 and maybe 0.1 with 1 gram weights to see how much they would hold, as they would not hold 100 grams, this would also make my graph more accurate.

Page  of 7

...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. Thermistor Coursework

    I do not think that the resolution of my sensor will be affected by the resolution of the voltmeter. Sensitivity The sensitivity of a sensor will depend upon what fixed resistance that is used in the potential divider and what the resistance of the thermistor is, in proportion to the fixed resistor.

  2. Find out what factors affect the strength of an electromagnet.

    I will use the same apparatus throughout, especially keep the same electromagnet so that my results are not influenced in any way. For example, different ammeters could measure differently, especially if they are very old and do not work properly.

  1. physics sensor coursework

    �10^-3] Min value = 11 816.14 ? Error max = (313.11/ 12 526.07) �100 Error max = 2.50% Error min = (396.82/ 11816.14) �100 Error min = 3.36% At 100 lux: Max value = Max V/ Min I Max value = (9.82 + 0.005)/ [(7.68 - 0.005)

  2. How different factors affect the resistance of a wire

    wire is the more atoms the electrons will have to get past. The electrons will obviously need to use more energy to get past the atoms because each of the atoms would be trying to keep the electrons from moving past, which is where resistance takes place.

  1. Physics coursework

    temperature coefficient. They work because at low temperatures, electrons are fixed onto atoms and so cannot move. As the electrons get hotter they receive enough energy to break away from their atoms, so the thermistor becomes a better conductor. In this experiment I do not know if I will have a NTC

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

    by turning the central dial on the power pack. Change it by increasing the power one amp at a time and don't exceed 5 amps because it can damage the power pack. * Measure the current with the ammeter taking the measurements in amps. * You may decide to change the other variable - the coils (more and less)

  1. The birth of electricity comes from what we call an atom or atoms and ...

    is called (voltage). The most important relationship in electrical science is that between the applied e.m.f or p.d and the current established by it. This relationship is known as Ohm's law and it was discovered by Georg ohm in 1826.

  2. The strength of an electromagnet.

    Magnets can be formed from certain metals (listed above). These metals have a crystal or domain structure. Magnets are made up of hundreds of thousands of domains. A domain is about1/1000th mm long and would consist of about 10 thousand million atoms. A domain is similar to a little crystal of iron.

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