Quartz glass capsule and electrical grid: what they have in common

1. Step 1. Quartz glass capsule — is part of — Halogen lamp. It withstands high temperature.
2. Step 2. Halogen lamp — is a kind of — Incandescent light bulb. An incandescent lamp.
3. Step 3. Incandescent light bulb — evolved into — LED lamp. It replaced incandescent bulbs.
4. Step 4. LED lamp — has part — Rectifier. The driver in the base rectifies mains current and limits the LED current; in an ordinary bulb it has no transformer.
5. Step 5. Rectifier — is part of — Charging station. Fast chargers rectify the mains current.
6. Step 6. Charging station — uses — Electrical grid. Powered from the grid.

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