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.
Transducers: Devices used to transform one kind of energy to another. When a transducer converts a measurable quantity (sound pressure level, optical intensity, magnetic field, etc) to an electrical voltage or an electrical current we call it a sensor. We will see a few examples of sensors shortly. When the transducer converts an electrical signal into another form of energy, such as sound (which, incidentally, is a pressure field), light, mechanical movement, it is called an actuator. Actuators are important in instrumentation. They allow the use of feedback at the source of the measurement.