Tesla coil and plough: what they have in common

1. Step 1. Tesla coil — uses — Electromagnetic induction. A transformer.
2. Step 2. Electromagnetic induction — is used in — Electric toothbrush. Wireless charging by induction.
3. Step 3. Electric toothbrush — evolved from — Toothbrush. A motorized toothbrush.
4. Step 4. Toothbrush — has part — Handle. A plastic handle.
5. Step 5. Handle — is part of — Plough. Handles for steering the plough.

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