Bending a selenium rectifier disk causes a temporary increase of the current flowing through it in both directions. The effect (discovered in December 1942) is especially pronounced in the reverse ...

Converting ac to dc has been accomplished by several different types of rectifiers through the years. Here are a few of the more common types of rectifiers used in the past 100 years. Mercury arc ...

FATIGUE in selenium rectifier photocells is generally marked by a falling off in the current output, during exposure to steady radiation, of cells which have been kept for some time in darkness. The ...