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

Superconductivity. 907349

Extracts from this document...

Introduction

Ali jawad

Superconductivity

In this case study, I will talk about how resistance is linked with superconductivity. I will also talk about the benefits and risks about superconducting materials and how superconductivity can enhance our daily life.

Superconductivity occurs in certain materials (metals and ceramic materials) at very low temperatures. When a material is superconductive, it has an electrical resistance of exactly ZERO. Because these superconducting materials have no electrical resistance, this means that the electrons can travel through them freely so energy isn’t lost through heat and are long-lasting materials. The electrical resistivity of a metallic conductor decreases gradually as the temperature is lowered, as the lower temperature makes it easier for the electrons to pair up with little or no resistance.

...read more.

Middle

Zinc

Metal

0.88

Aluminium

Metal

1.19

Tin

Metal

3.72

Mercury

Metal

4.15

YBa2Cu3O7

Ceramic

90

TlBaCaCuO

Ceramic

125

http://www.howstuffworks.com/question610.htm

This table shows how the critical temperature varies between different superconductors.

Superconductivity was discovered in 1911 by Heike Kamerlingh Onnes. He was studying the resistance of solid mercury at cryogenic (very low) temperatures, when at 4.2K; he observed that the resistance disappeared.

...read more.

Conclusion

However, there’s no superconductors at room temperature, therefore we have to cool it a very low temperature for superconductivity to work. This is a MAJOR disadvantage, as it costs a lot of energy and money to get it to that temperature, making it less environmentally friendly as more fossil fuels are burnt adding to the effect of global warming/climate change.

For my practical, I’m measuring the resistivity of a metal and identifying it, linking it with this case study which is what it’s all about. So if the resistivity of that metal is zero; I know it’s a superconductor.  

Bibliography

1. Physics Review

April 2004, Volume 13, Issue 4

‘Supercool’

Elizabeth Swinbank

2. AS Salters Horners Advanced Physics

Heinemann

Page 99

3. http://en.wikipedia.org/wiki/Superconductivity

4. http://www.howstuffworks.com/question610.htm

...read more.

This student written piece of work is one of many that can be found in our AS and A Level Modern 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 Modern Physics essays

  1. Peer reviewed

    Measurement of the resistivity of Nichrome

    5 star(s)

    Graph B (Wire B) Red line gradient 0.106 0.198 Best fit line gradient 0.104 0.196 Blue line gradient 0.102 0.194 Calculate the uncertainty of gradient Maximum value of uncertainty of gradient (Max) = (Red line gradient/Best fit line gradient) -1 Minimum value of uncertainty of gradient (Min)

  2. Finding the Resistivity of a Wire

    I can also illustrate the accuracy of my investigation by establishing the spread of results. Looking at my graph, there is not a great deal of spread as all but one result lie directly on the line. The only result which does not lie on the line is the result for 0.1m, for which the average resistance was 0.25?.

  1. A superconductor is a substance which conducts an electric current with zero resistance. It ...

    They then won a Nobel prize in 1972. The BCS theory explained superconductivity at temperatures close to absolute zero for elements and alloys. However, this theory didn't success in explaining how superconductivity occurs in higher temperatures. The BCS Theory: The molecular vibrations in the lattice slow down when the temperature goes down, bellow the critical temperature this lack

  2. Physics - Resistivity

    The relevant property of the material is its resistivity. VOLTAGE AND CURRENT VOLTAGE Voltage is the 'push' which makes a current flow through a wire. We can distinguish between two types of voltage, one being a voltage where the charge is losing energy, such as through a resistor on the wire like a light bulb, this is called a potential difference.

  1. The Mercury Spectrum.

    The slit of the collimator viewed through the telescope is then brought into focus by adjusting the collimator. The collimator is thus set to produce parallel light. Diffraction grating The diffraction grating provides the simplest and most accurate method for measuring wavelengths of light.

  2. I am going to investigate what the resistivity is of a pencil lead. ...

    0.44 0.443 1.00 0.55 0.54 0.55 0.546 1.20 0.66 0.66 0.67 0.663 1.40 0.84 0.85 0.85 0.846 1.60 1.11 1.10 1.10 1.103 1.80 1.28 1.26 1.30 1.280 2.00 1.46 1.45 1.45 1.453 As you can see from the graph, the line of best fit does not pass through (0,0)

  1. Measuring The Resistivity Of A Pencil Lead.

    1.03V 0.1A 7.923? 1.03V 0.1A 7.923? 1.03V 0.1A 7.923? 1.03V 0.1A 7.923? 50mm 0.39V 0.1A 3? 0.39V 0.1A 3? 0.39V 0.1A 3? 0.39V 0.1A 3? 0.39V 0.1A 3? As you can see from my preliminary results my resistance did not fluctuate at a current of 0.1A at each extremity of the pencils length.

  2. Investigating how temperature affects the resistance in a wire

    k*the temperature (where k = the gradient). Apparatus: -5 lengths of standard insulated wire approximately 40 cm in length (used to connect the batteries to the multimeters and the steel) -Two digital multimeters (used to measure the volts and the amps)

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