High-voltage direct current und dewargefäß: was sie gemeinsam haben

1. Schritt 1. High-voltage direct current — nutzt — Rectifier. Rectifiers and inverters at the ends of the line.
2. Schritt 2. Rectifier — ist Teil von — LED lamp. The driver in the base rectifies mains current and limits the LED current; in an ordinary bulb it has no transformer.
3. Schritt 3. LED lamp — entwickelte sich aus — Incandescent light bulb. It replaced incandescent bulbs.
4. Schritt 4. Incandescent light bulb — nutzt — Vacuum. The bulb was evacuated so the filament would not burn out.
5. Schritt 5. Vacuum — wird verwendet in — Dewargefäß. A vacuum.

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