High-voltage direct current e Vaso de Dewar: o que têm em comum

1. Passo 1. High-voltage direct current — utiliza — Rectifier. Rectifiers and inverters at the ends of the line.
2. Passo 2. Rectifier — faz parte de — LED lamp. The driver in the base rectifies mains current and limits the LED current; in an ordinary bulb it has no transformer.
3. Passo 3. LED lamp — evoluiu de — Incandescent light bulb. It replaced incandescent bulbs.
4. Passo 4. Incandescent light bulb — utiliza — Vacuum. The bulb was evacuated so the filament would not burn out.
5. Passo 5. Vacuum — é utilizado em — Vaso de Dewar. A vacuum.

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