Grounding rod and headphones: what they have in common

1. Step 1. Grounding rod — is part of — Lightning rod. Electrodes in the ground.
2. Step 2. Lightning rod — uses — Electrical conduction. It carries the current into the ground.
3. Step 3. Electrical conduction — is used in — Copper wire. Copper conducts current well.
4. Step 4. Copper wire — is part of — Headphones. A cable.

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