Metal Filings

Some articles on filings, metal filings:

Édouard Branly - Coherer
... in 1884 through 1886 that iron filings contained in an insulating tube with two electrodes will conduct an electrical current under the action of an ... is based upon the large resistance offered to the passage of electric current by loose metal filings, which decreases when direct current or alternating current is applied between the terminals of the ... is based on the thin layers of oxide covering all the filings, which is highly resistive ...

Famous quotes containing the word metal:

    There is a lot of talk now about metal detectors and gun control. Both are good things. But they are no more a solution than forks and spoons are a solution to world hunger.
    Anna Quindlen (b. 1953)