Estação de recarga e Vaso de Dewar: o que têm em comum

1. Passo 1. Estação de recarga — tem como parte — Rectifier. Fast chargers rectify the mains current.
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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