Definitions [1]
Explain Meissner Effect with the help of diagram.
Superconducting material kept inamagnetic field expels the magnetic flux out its body
when cooled below the critical temperature and exhibit perfect diamagnetism.This is called MEISSNER EFFECT.
It is found that as the temperature of the specimen is lowered toTc,the magnetic flux
is suddenly and completely expelled from it.The flux expulsion continues for
T<Tc.The effect is reversible.
- When the temperature is raised from below Tc.The fluxdensity penetrates the
specimen again at T=Tc and the material turns to the normal state.
Important Questions [9]
- Define the critical temperature. Slow that in the superconducting state the material is perfectly diamagnetic.
- Explain Meissner Effect with the Help of Diagram.
- “Superconductor is a perfect diamagnetic”, Explain.
- Calculate conductivity of a germanium sample if a donar impurity atoms are added to the extent to one part in 106 germanium atoms at room temperature.
- Differentiate Between Type-1 and Type- Ii Superconductors.
- Discuss formation of copper pairs and energy gap in superconductor on the basis of BCS theory.
- What is Maglev? How it can have very high speed?
- What is working principle of SQUID ? Explain how it is used to detect the magnetic field?
- What is the Working Principle of Maglev? Explain How It Can Acquire High Speed?
