• 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...


Ali jawad


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.





















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.


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.  


1. Physics Review

April 2004, Volume 13, Issue 4


Elizabeth Swinbank

2. AS Salters Horners Advanced Physics


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

    Other than this one there are no obvious anomalies. This is because I can make the voltage almost exact and cut down on other variables that would have affected the result. I was expecting the shape of the graph to be a straight line passing through (0,0)

  2. Physics - Resistivity

    In the material of the wire there are free electrons (there needs to be free electrons for current to flow). The atoms of the wire would usually bind tightly together in a lattice such as in copper or steel, one electron from each atom will break away from this and become a conduction electron.

  1. Measuring The Resistivity Of A Pencil Lead.

    I will start the experiment by setting up the apparatus as shown in my diagram. Once the apparatus is set up I will sharpen the pencil at both ends to its first length. I will then place the crocodile clips on the exposed pencil lead and switch on the power pack.

  2. Investigating how temperature affects the resistance in a wire

    that these results show the opposite of what the theory predicts), it tends to suggest that the relationship is linear (y=mx + c not y=nx^2 + mx +c). Therefore according to this theory, the relationship is linear, therefore according to the linear treadline the relationship is y = -0.0238x + 49.577 namely Ohms = -0.0283the temperature + 49.577.

  1. Finding the Resistivity of a Wire

    At each point I will measure the diameter twice, with readings at 90� angles to each other to ensure that the wire is cylindrical. o Voltage across length of wire: measured using voltmeter at 10 different lengths of wire - from 1.00m to 0.10m at 0.10m intervals, each repeated three times.

  2. Investigating the factors affecting the size of current flowing through a length of resistivity ...

    The copper plates were cleaned with emery paper before they were placed against the putty. 2. I inserted the plates at right angles to the putty and gently pushed the two pieces of putty together to try to ensure that good contact was made without changing the shape of the putty.

  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. 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.

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