Family Quotes and Sayings â Family Day. âFamilies are like fudge â mostly sweet with a few nuts.â. âOur family is a circle of strength of love with every birth and every union the circle grows.â. âEveryone needs a house to live in, but a supportive family is what builds a home.â Â» Anthony Liccione. âYou donât choose your family.
Mercury was historically the first to show superconductivity, and it is an example of a Type I superconductor. Its practical usefulness is limited by the fact that its critical magnetic field is only 0.019 T, so the amount of electric current it can carry is also limited.
Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields occurring in certain materials when cooled below a characteristic critical temperature.It was discovered by Dutch physicist Heike Kamerlingh Onnes on April 8, 1911 in Leiden.n superconducting materials, the characteristics of superconductivity appear when the temperature T is lowered below a critical temperature Tc. The value of this critical temperature varies from material to material.