Dielectric heating and payment card: what they have in common

1. Step 1. Dielectric heating — is used in — Microwave oven. The field heats the water in the food.
2. Step 2. Microwave oven — has part — Magnetron. The magnetron generates the microwaves.
3. Step 3. Magnetron — has part — Permanent magnet. A magnet makes the electrons spiral.
4. Step 4. Permanent magnet — uses — Magnetism. A permanent field.
5. Step 5. Magnetism — is used in — Payment card. A magnetic stripe.

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