• 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. Free essay

    Resistance of a Wire

    4 star(s)

    Turn on the power supply to 4 volts. 5. Record the volts and currents for each time you change the wire. 6. Repeat experiment two more times. Obtaining Evidence To get the resistance: V/I = R Table of Results (1)

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

    This will also reduce the amount of energy lost to the surroundings slightly. * Stirring the water In order to make sure the temperature of the water in the copper can has reached the correct, accurate temperature, I will be stirring the water constantly using the thermometer in order to

  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. A Resistance Investigation - Independent Variables

    To ensure that the experiment is fair I will be controlling - * The potential difference and keeping it the same number of volts through out the whole experiment. To do this I will adjust the rheostat and measure the potential difference on the voltmeter to ensure it is the same.

  1. Testing the strength of electromagnets

    However make sure that the power pack is turned of at the power switch and then you see how many paper clips it can pick up. The current passing through the wire will produce an invisible magnetic field which will attract the paper clips.

  2. An Experiment to test which combinations of metals will produce the highest voltage in ...

    If the anode was zinc (-0.76) then the difference would be 1.1 - not as large a difference as the magnesium due to it being less reactive. Other examples could be zinc and magnesium, a difference of 1.61, lead (-0.13) and iron (0.04), a difference of 17 and so on.

  1. Factors affecting Resistance of a wire

    * I will be careful when handling live wires. Method: In the preliminary experiment I will test the voltage (3V, 6V & 9V) and current of the wire. We will collect our equipment and then set it out as shown in the diagram above, by connecting the power pack to an 18 SWG wire.

  2. The Bouncing Ball Experiment

    I also want to work out where any lost energy in the experiment has gone. The Preliminary Experiments: I have chosen to use a ping-pong ball to investigate. I chose a ping-pong ball for my investigation because after quickly testing each ball's bounce height, I found that its bounce height was most suitable for use with the equipment we had.

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