• 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
  12. 12
    12
  13. 13
    13
  14. 14
    14
  15. 15
    15

Draw stress and strain graphs for the metal copper and the alloy constantan. Calculate the figures of young's modulus for copper and constantan. Discuss the physics involved.

Extracts from this document...

Introduction

AS Physics Data Analysis coursework

        This coursework assignment requires me analyse and evaluate data on copper and constantan given to me. It entails investigating the young’s modulus of the metal and alloy. Thus I will use many methods during to complete my investigation.

Aims:

  1. To draw stress and strain graphs for the metal copper and the alloy constantan
  2. To calculate the figures of young’s modulus for copper and constantan
  3. To discuss the physics involved

Plan:

        In this investigation I have received results for extension of copper and constantan for certain forces applied to it, for which I will analyse and calculate the young’s modulus. The results I have been given are forces applied to copper and constantan, three sets of results for the metal and alloy and this can be used by averaging data to give more accurate results thus these results given to me will be used to create graphs, calculate young’s modulus and analyse data for both metals so I can complete my investigation.

        I will need to draw a force and extension graph for both copper and constantan, the extension shown will be the averaged value for each metal. I will also calculate the stress and strain values and plot this on a graph for both copper and constantan, I will plot these on the same graph and analyse the graph, hence I can find any patterns from the data and this will require me to draw my graphs accurately so I can correctly analyse the results to make judgements and conclusions.

        I will use Microsoft Excel spreadsheet program to make tables of data, with the data I have been given. I will be using formulas to calculate average extension, stress, strain and young’s modulus for copper and constantan.

...read more.

Middle

1.000E-03

1.000E-03

2.000E-03

1.33E-03

3.720E+07

6.35E-04

5.86E+10

6

3.000E-03

2.000E-03

3.000E-03

2.67E-03

5.580E+07

1.27E-03

4.39E+10

8

4.000E-03

3.000E-03

3.000E-03

3.33E-03

7.440E+07

1.59E-03

4.69E+10

10

5.000E-03

4.000E-03

4.000E-03

4.33E-03

9.301E+07

2.06E-03

4.51E+10

12

6.000E-03

5.000E-03

5.000E-03

5.33E-03

1.116E+08

2.54E-03

4.39E+10

14

7.000E-03

5.000E-03

5.000E-03

5.67E-03

1.302E+08

2.70E-03

4.83E+10

16

9.000E-03

6.000E-03

6.000E-03

7.00E-03

1.488E+08

3.33E-03

4.46E+10

18

1.100E-02

7.000E-03

1.000E-02

9.33E-03

1.674E+08

4.44E-03

3.77E+10

20

1.600E-02

1.000E-02

1.200E-02

1.27E-02

1.860E+08

6.03E-03

3.08E+10

22

2.200E-02

1.500E-02

4.500E-02

2.73E-02

2.046E+08

1.30E-02

1.57E+10

24

9.600E-02

3.200E-02

1.400E-01

8.93E-02

2.232E+08

4.25E-02

5.25E+09

26

BROKE

4.300E-02

BROKE

4.300E-02

2.418E+08

2.05E-02

1.18E+10

28

BROKE

BROKE

BROKE

BROKE

BROKE

BROKE

BROKE

Table 1

CONSTANTAN

Force (N)

Extension (m)

Extension (m)

Extension (m)

Average Extension (m)

Stress (Pa) F/A

Strain (Ratio) E/L

Young's Modulus

0

0

0

0

0.00E+00

0.00E+00

0.00E+00

0.00E+00

2

0

0

0

0.00E+00

2.08E+07

0.00E+00

0.00E+00

4

2.00E-03

1.00E-03

1.00E-03

1.33E-03

4.16E+07

6.35E-04

6.55E+10

6

3.00E-03

1.00E-03

1.00E-03

1.67E-03

6.24E+07

7.94E-04

7.86E+10

8

4.00E-03

2.00E-03

2.00E-03

2.67E-03

8.32E+07

1.27E-03

6.55E+10

10

4.00E-03

3.00E-03

3.00E-03

3.33E-03

1.04E+08

1.59E-03

6.55E+10

12

5.00E-03

3.00E-03

4.00E-03

4.00E-03

1.25E+08

1.90E-03

6.55E+10

14

5.00E-03

4.00E-03

5.00E-03

4.67E-03

1.46E+08

2.22E-03

6.55E+10

16

6.00E-03

4.00E-03

5.00E-03

5.00E-03

1.66E+08

2.38E-03

6.98E+10

18

8.00E-03

4.00E-03

5.00E-03

5.67E-03

1.87E+08

2.70E-03

6.93E+10

20

8.00E-03

4.00E-03

6.00E-03

6.00E-03

2.08E+08

2.86E-03

7.28E+10

22

8.00E-03

5.

...read more.

Conclusion

I have concluded that my prediction was correct as this was shown by my calculations and can be seen in the graphs I have drawn that constantan has a higher young’s modulus than copper.

I will now evaluate the accuracy of the data given to me and calculations I have made myself. I have set the my percentage error to be 5%, so if the percentage error is above 5% then I believe this is not accurate enough for an A-level experiment.

Percentage error in measurements

% error=

(Error in measure/measurement) x 100

Area of wire

Smallest measurements: 0.005x10-3m (Micrometer) and 0.35x10-3m (smallest recorded measurement).

    (0.005x10-3/0.35x10-3) x100

= 1.43% error

The error percentage maximum I set was 5%, I have worked out the error percentage of area of wire to be 1.43%, and therefore this is acceptable.

Original Length

Length of wire taken as 2.1m

The error in measure of metre rule is 5mm (5x10-3m)

    (0.005/2.1) x100

= 0.238095238%

= 0.24% error

This error is acceptable as it is well below the 5% error maximum I set, so this was seen to be literally an error free measurement.

Force

Mass= 100g each, but 2N intervals in force, so 200g mass for each interval. The mass error is between 99-101g, so +/- 1g. As two were used then 1x2= +/-2g error.

   (2/200) x100

= 1% error

As my error maximum was set to 5%, a 1% error for force is acceptable.

Bibliography

  • http://www.york.ac.uk/depts/chem/course/studhand/solids.html- found out composition of copper and constantan. (7/10)
  • http://www.azom.com/details.asp?ArticleID=60- information on copper alloys (5/10)
  • AS physics text book: very useful, chapter 4-5 are very useful and contained lots of information on the physics theory of my investigation (9/10)
  • AS-physics CD-ROM: provided guides on how to set out coursework and information on the experiment hat this coursework was based on. (8/10)
  • AS Physics teacher: Miss Bottomly: Very helpful. Introduced coursework, hence this would not have been possible without teachers help. (10/10)

By, Kamlesh Vadukul (Heathland school) AS-Level Physics

Word count: 5153

...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. The sources of information need to be indicated within the work itself.
2. The running commentary should be removed.
3. The conclusions show good practice.
4. The evaluation should suggest further research opportunities.
****

Marked by teacher Luke Smithen 13/08/2013

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

    Ethanol (repeat) -weight Temperature Start- 168.23 Start- 39�C End- 161.46 End- 50�C Burnt- 0.77 Rise- 11�C Ethanol (RMM) = C2H3OH= 46 Energy released= 11 x 100 x 4.2 Moles = 0.77 � 46 = 0.0167 = 4620 Energy/mole = energy/moles = 4620�0.0167 = 276.65KJ/MOL 1.

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

    Scientifically the strength of an electromagnet will increase, when a larger current is applied. This is because electrons behave like tiny magnets, because when they spin in the same direction, a magnetic field is generated. The magnetic field will increase even more if the current applied is increased, because the

  1. An Experiment To Find the Resistivity of a Wire

    ACCURACY: - To keep this experiment as accurate as possible, I need to make sure the length of the wire is measured precisely from the inside edge of the crocodile clip, making sure that the wire is straight when I do this.

  2. Testing the strength of electromagnets

    Equipment Green wire striped at both ends- The wire needs to be striped at both ends so that the electricity can flow through the wire easier without an insulator preventing the current flowing. This wire is to coil round the core Crocodile clips- To attach the connecting wires from the power pack to the coiling wire.

  1. A Resistance Investigation - Independent Variables

    Table to show results from preliminary trials Power source Length of wire (cm) Volts (V) Amps (A) Battery 200.0 3.65 0.81 5.0 1.02 2.08 15.0 0.47 0.97 100.0 0.95 0.29 180.0 1.5 0.25 20.0 80 1.24 Cell 100.0 60 0.18 200.0 60 0.09 20.0 60 0.81 60.0 60 0.31 Conclusions The preliminary trials were successful we achieved all our objectives.

  2. Investigate the strength of an electromagnet

    5 1 12 11 11.5 1.3 40 13 6 16 14.5 1.3 50 6 10 3 6.3 1.3 18** 15** 16.5 1.3 60 21 17 23 20.3 1.3 70 20 22 18 22 22 1.3 80 24 17 15 23 23.5 1.3 90 27 24 26 26.5 1.3 100 22

  1. How the Resistance of a Wire is affected by Cross-Sectional Area

    (Nichrome or Constantan). I compared results on two different thickness SWG 32 and SWG 26 and recorded this information in three tables and three graphs. In conclusion I have decided to use Nichrome wire to experiment on because it has a greater resistance and larger range between highest and lowest resistance.

  2. An in Investigation into the Resistance of a Wire.

    This produces a direct current (d.c). The mains electricity used in the home is quite different. The electrons in the circuit move backwards and forwards. This kind of current is called alternating current (a.c). Mains electricity moves forwards and backwards 50 times each second, that is with a frequency of 50hertz (Hz).

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