![]() The opposite of a conductor is an insulator. All of the superconductors that have been discovered by scientists to date require a very cold temperature on the order of minus 234 degrees C in order to become superconductors. Sometimes conductance is represented by the letter "G" where G is the inverse of resistance, R.Ī superconductor is a material that is a perfect conductor. ![]() The resistance of a material is a measurement of how well a material opposes the flow of electric current. Copper is used in electrical wiring and electrical circuits throughout the world.Īnother way to think of conductance is as the opposite of resistance. Today, the most commonly used electrical conductor is copper. Unfortunately, silver is too rare and expensive to use in most electrical equipment. The most conductive of all the elements is silver. Metals tend to have electrons in the outer layer of their atoms that are freely shared. ![]() In general, the best electrical conductors are metals. In a conductor, the outer electrons of the atom are loosely bound and can freely move through the material when an electric charge is applied. Conductors and insulators are both important in the field of electronics.Įlectrical conductors allow electric current to flow easily because of the make up of their atoms. Other materials are resistant to the flow of electric current. Send us feedback.Some materials allow electric current to flow more freely than others. These example sentences are selected automatically from various online news sources to reflect current usage of the word 'insulator.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. 2022 While this potential and the material’s memory components are intriguing, what’s even more interesting is the fact that when heated to a certain temperature, VO2 turns from an insulator to a metal. 2022 Another insulator that’s sourced from animals, down has also faced ethical objections-in its case, over live plucking and force feeding (some down is harvested from birds fattened for production of foie gras). Doug Johnson, Discover Magazine, 30 July 2021 Whales, seals and some penguins, for example, have thick blubber which acts as a body heat insulator, according to the AAP. ![]() 2023 The earthen building material is a poor insulator but has a strong ability to store heat. Eric Schlaepfer, IEEE Spectrum, 14 Jan. 2020 The simplest capacitor consists of two parallel metal plates with a gap between them, but capacitors can take many forms so long as there are two conductive surfaces, called electrodes, separated by an insulator. 2017 But during the first half of the 20th century, the spongy material from the bark of the cork oak (Quercus suber) gained much wider use as an industrial sealant and insulator. Nathaniel Scharping, Discover Magazine, 19 Oct. 2023 The surrounding rock also serves as an insulator against temperature swings that take the moon’s surface from hot enough to boil water to less than -200 degrees Fahrenheit in the course of a single day. ![]() Recent Examples on the Web Gloves with this function utilize conductive elements in the fingertips but may not work if your phone or touchscreen device uses a thick glass screen protector, which can be an insulator. ![]()
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