Incandescent light bulb and heat pump: what they have in common

1. Step 1. Incandescent light bulb — works like — Heating element. A lamp and a heater use the same effect — a conductor heated by current; they differ in purpose, light or heat.
2. Step 2. Heating element — is part of — Tumble dryer. A heater.
3. Step 3. Tumble dryer — has part — Heat pump. Heat-pump models.

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