Wave theory and electric generator: what they have in common

1. Step 1. Wave theory — uses — Sound wave. Sound is a wave.
2. Step 2. Sound wave — is used in — Headphones. The diaphragm creates a sound wave.
3. Step 3. Headphones — has part — Copper wire. A cable.
4. Step 4. Copper wire — is part of — Electric generator. Windings.

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