a galvanometer that is unaffected by the earth’s magnetic field and is used for measuring small currents.
Fig. 67 shows an astatic galvanometer for measuring weak currents.
Things a Boy Should Know About Electricity Thomas M. (Thomas Matthew) St. John
unstable; unsteady. Physics. having no tendency to take a definite position or direction. adjective not static; unstable (physics) having no tendency to assume any particular position or orientation (of a galvanometer) having two mutually compensating magnets arranged so that the instrument is independent of the earth’s magnetic field adj. 1827, from Greek astatos “unstable, not […]
noun (chem) a binary compound of astatine with a more electropositive element
a rare element of the halogen family. Symbol: At; atomic number: 85. noun a radioactive element of the halogen series: a decay product of uranium and thorium that occurs naturally in minute amounts and is artificially produced by bombarding bismuth with alpha particles. Symbol: At; atomic no: 85; half-life of most stable isotope, 210At: 8.1 […]
noun John. 1688–1743, English potter; earliest of the great Staffordshire potters Historical Examples astbury of Shelton, early in the 18th century, made red crouch, and white stoneware. The Collector’s Handbook to Keramics of the Renaissance and Modern Periods William Chaffers astbury saw the dust, and it at once occurred to him that it might be […]