Which of the following principle is used to produce low temperatures ? (a)Superconductivity (b)Joule Kelvin effect (c)Thermoelectric effect (d) Adiabatic demagnetization
option D. Magnetic refrigeration is a cooling era primarily based totally at the magneto-caloric effect. This method may be used to gain extraordinarily low temperatures, in addition to the tiers utilized in not unusualplace refrigerators, relying at the layout of the system. The magnetocaloric effect (MCE, from magnet and calorie) is a magneto-thermodynamic phenomenon wherein a extrade in temperature of a appropriate cloth is because of exposing the cloth to a converting magnetic field. This is likewise acknowledged with the aid of using low temperature physicists as adiabatic demagnetization, because of the utility of the procedure especially to create a temperature drop
