NFC and electric motor: what they have in common

1. Step 1. NFC — uses — Electromagnetic induction. The phone's coil induces a current in the card's coil — electromagnetic induction.
2. Step 2. Electromagnetic induction — is used in — Electric toothbrush. Wireless charging by induction.
3. Step 3. Electric toothbrush — has part — Electric motor. A small motor.

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