Superconductor Critical Temperature

Superconductivity is the state in which a material has no electrical resistance and magnetic fields cannot penetrate it. A material that reaches this state is called a superconductor. The key idea in the transcript is the critical temperature, which is the temperature at which the change happens.

A superconductor is a material that offers zero resistance to the flow of electrons with an efficient transfer of electrical energy and no heat loss.

In 1911, Heike Kamerlingh Onnes observed that resistance goes to zero when mercury is cooled below 4.2 Kelvin. This is known as the critical temperature for mercury, and the phenomenon is kn...