Electric stove and voltaic pile: what they have in common

1. Step 1. Electric stove — includes — Induction hob. An induction hob is an electric stove that heats the pan itself with eddy currents.
2. Step 2. Induction hob — has part — Transistor. A high-frequency inverter.
3. Step 3. Transistor — is part of — Transistor radio. Transistors instead of vacuum tubes.
4. Step 4. Transistor radio — has part — Dry cell. Batteries.
5. Step 5. Dry cell — evolved from — Voltaic pile. A convenient form of the galvanic cell.

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