- October 25, 2020
- Posted by: OptimizeIAS Team
- Category: DPN Topics
Subject : Science & tech
Context : A group of researchers at University of Rochester, Intel corporation and University of Nevada in the U.S. have created a material that is superconducting at 15 degrees Celsius.
A new material composed of carbon, hydrogen and sulphur superconducts at 15 degrees Celsius.
- Superconductors are materials that conduct electricity with no resistance. Unlike the more familiar conductors such as copper or steel, a superconductor can carry a current indefinitely without losing any energy. They also have several other very important properties, such as the fact that no magnetic field can exist within a superconductor.
- Another property of a superconductor is that it will exclude magnetic fields, a phenomenon called the Meissner effect.
Advantage of superconductors:
- Currently, superconductivity can only be achieved at temperatures far below zero, in processes that are too expensive for wider application.
- The devices have low power dissipation, high operating speed, and extreme sensitivity.
- Devices built with room temperature superconductors tend to be extremely efficient and entail large savings in both energy and costs.
- Superconductors already have drastically changed the world of medicine with the advent of MRI machines, which have meant a reduction in exploratory surgery.
- Power utilities, electronics companies, the military, transportation, and theoretical physics have all benefited strongly from the discovery of these materials.
- When a material makes the transition from the normal to the superconducting state, it actively excludes magnetic fields from its interior; this is called the Meissner effect.
- The critical temperature for superconductors is the temperature at which the electrical resistivity of metal drops to zero.