Mobile payments and electrical grid: what they have in common

1. Step 1. Mobile payments — uses — NFC. NFC.
2. Step 2. NFC — uses — Electromagnetic induction. The phone's coil induces a current in the card's coil — electromagnetic induction.
3. Step 3. Electromagnetic induction — is used in — Transformer. Induction between the windings.
4. Step 4. Transformer — is part of — Electrical grid. Transformer substations.

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