In most cases,when current passes through wires of transformers, electrical motors,generators, transmission lines and others, energy is wasted. The waste of energy can be minimized if materials that has no resistance at low temperature are being used. These materials are called superconductors.

It was in 1911 that a Dutch physicist named Kamerlingh Onnes found out that the resistance of a conductor will not change significantly but suddenly dropped to zero at a certain temperature.

The temperature at which a conductor material become a superconductor is called as the transition temperature of the material.

Since before experts had been searching for superconductors. In recent years, some compounds was found to have a transition temperatures of only 30 K or more. Another compound was produced in 1987 with a transition temperature of 90 K was found. Within a month a transition temperature of 195 K was also found. With this rate of research, there will be new discoveries of more good and powerful superconductors in the future time.

Superconductors are very much useful specially when use in transmission lines. Heavy transmission lines will be replaced and energy can be transmitted to lighter superconductors. In this process, the cost of electrical energy will be reduce.

The use of superconductors are very efficient. It minimizes possibility of energy waste or energy loss as it pass through wires. The use of superconductors can also reduce the production of large amount of thermal energy that can cause thermal pollution once discharged to bodies of water.