• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12

Investigate young's modulus behind Constantan and Copper.

Extracts from this document...



In this physics coursework, I have been asked to investigate young’s modulus behind Constantan and Copper. I will produce the stress strain graphs showing the young’s modulus for both the metals. I will after when constructing the graphs, I will discuss the physics behind my results and I will compare the young’s modulus for both materials.    


  • To draw the stress-strain graphs for a metal and an alloy.
  • To work out the figures for young’s modulus for both metals.
  • To discuss the physics behind my results.


For this particular investigation, I have been issued with the results and have been asked to analyse the results finding the young’s modulus for two materials, which are: Copper and Constantan. From the results given, I will construct the necessary graphs, analyse, and compare the materials so I can successfully compare the young’s modulus of the given materials. I have been provided with the following information: the force applied to the material, three results for the extension, which will help me gain accuracy when averaging this out.

I will produce a graph showing the stress-strain from the data, which has been provided. This will present me the young’s modulus of the metal (alloy), and subsequently I will create a second graph, which will show Force-extension, and I will average out the extension. In this graph, I will present the metal and the alloy on the same graph paper so that I can find any patterns, which may arise. I will hand draw my graphs to great accuracy; therefore the results and judgment I make will be based on how accurate my graphs are drawn out.  

...read more.


From my graphs, I will find out the gradient and therefore be able to work out young’s modulus by the formulae above. I believe that young’s modulus for constantan will be high because I consider from the evidence provided that it will be able to take more strain then the copper (crystalline). I deem this simply because constantan being an alloy can take more of a load then a pure metal. Here is a typical example of a stress train graph: (obtained from my physics textbook)




Fair test:

  • Test the wire to get an average; I will do this three times.
  • All of my figures will be to three significant figures.
  • I will carry this out on the same day in the same conditions, using all of the same apparatus.
  • I will keep the metre stick stuck down to the table and not move it, so that it won’t affect my results, when marking off the extension.


I will be using the following:

  • Pulley
  • Metre ruler and a marker
  • Mass weights and actual storage unit
  • Wooden blocks to hold the wire in place
  • A G clamp.


I will ensure that I keep this a safe experiment by:

  • Keeping the cardboard over the wire, as when the wire snaps the wire would not suddenly lift up and cause any danger.
  • I will also make sure there are not people crowding the experiment when it is being carried out, as the weights can cause danger if they fall.


I have entered the results I have been given into Microsoft excel. From this the extension I have been given, is given in mm, but in physics we have to convert mm to metres.

...read more.


        The experiment in general had gone according to plan. I’m pleased with what I had found out through the results as I believe my prediction was correct and backed up by the results from the graph I had achieved. I believe that repeating the experiment three times meant that I had accurate results as from the average extension I plotted the graphs. Concluding this experiment I had found out that constant had the higher young’s modulus due to it being an alloy and containing the 40% of Nickel which gives it the strength property. Copper however, had been more flexible being a pure metal the atoms were easily dislocated and this resulted in copper breaking very easily as it had a small elastic limit.

Improvements-IF TO DO IT AGAIN


I had obtained information from the following resources:

  • AS physics textbook: I had found this source extremely interesting and useful as much of the diagrams I had used came from this textbook, which explained the comparison between the pure metal and alloy. This textbook had given much information which was relevant to this coursework. 8/10
  • AS physics CD-ROM: I had achieved the diagrams mostly from the CD ROM, this CD had many diagrams which were useful, however this did not contain much written information which was useful and could aid me with this coursework. 6/10
  • Internet: I found that the information from these sources seemed very reliable and information I had gained, helped me understand the complex issues with the relation of physics to young’s modulus. I had obtained the various information I have included on the background information on the sensor from the following Internet sites:
  • http://www.emsl.com/tensile_strength.html
  • http://www.encyclopedia.com/html/Y/Youngsmo.asp
  • http://hyperphysics.phy-astr.gsu.edu/hbase/permot3.html

...read more.

This student written piece of work is one of many that can be found in our GCSE Electricity and Magnetism section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Here's what a teacher thought of this essay

4 star(s)

This is a well structured and well written report.
1. There is a running commentary that needs to be removed.
2. There is information that is in the wrong section.
3. The evaluation needs to give ways to overcome problems with the methods and to suggest further research opportunities.

Marked by teacher Luke Smithen 05/09/2013

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 Electricity and Magnetism essays

  1. Resistance of a wire - PHYSICS COURSEWORK GCSE

    Having found out what the range of my investigation will be, I shall start with the smallest value and work my way up the scale recording the values shown on both the voltmeter (to ensure accuracy) and the ammeter. I will record my findings in a table of results.

  2. To investigate which fuel gives out the most energy when burnt. We are burning ...

    * Heat mats (draft shields) In my preliminary, a lot of heat was lost due to the flicker of the fuel's flame. Energy was also lost to the surroundings. In my actual I will be placing heat mats on wither sides of the experiment, to try and reduce the amount of energy lost through the flicker of the fuel's flame.

  1. Electromagnets - What factors affect strength of an electromagnet?

    Connect the terminals of the batteries in series, with the two wire ends. 4. Using the core of the electromagnet, try picking up the paperclips. 5. Record the number of paper lips picked up. 6. Repeat each experiment three times with the different number of turns on core each time, to get an average.

  2. Free essay

    Resistance in a wire

    You must acknowledge the potential hazardous aspects to maintain safe. Equipment for preliminary experiment The equipment required is as follows: * A power pack * A Volt meter * An Amp meter * Constantine wire (5 thicknesses) * Electrical wire * A Crocodile clip Method I am aiming to deduce

  1. Physics GCSE Coursework:Factors affecting the resistance of a wire

    RESISTANCE (ohms) = VOLTAGE (volts) / CURRENT (amps) R = V/I Preliminary Experiment Length of wire as a factor Aim: The purpose and aim of this investigation is too see how the length of a wire affects the electrical resistance.

  2. Length vs Resistance

    The temperature of the wire would also have to be controlled, so the current cannot go above 1A. Finally, we would also have to make sure that the purity of the wires was the same, meaning that the amount of the material in each of the different wires would have

  1. Electromagnetism - investigating what effect increasing the number of turns in a coil on ...

    Table of Results Number of turns Current (Amps) on the coil 1A 2A 3A 10 0g 0g 50g 20 0g 40g 70g 30 30g 80g 150g The table above shows the current and the number of turns I have used. The weights in the middle show how strong the electromagnet was in grams.

  2. Electromagnets - an investigation on electromagnets, our aim will be to find out what ...

    1 40 2 2 2 2 1 60 3 3 3 3 1 80 7 7 7 6.6 1 100 11 10 11 10.6 1 120 13 12 12 12.6 1 140 16 15 15 15.3 With these results that I have gained, I can create an average results set

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