Horn and incandescent light bulb: what they have in common

1. Step 1. Horn — is made of — Tin. Tinplate.
2. Step 2. Tin — is material for — Fuse. The fuse element is tin or lead.
3. Step 3. Fuse — uses — Joule heating. The wire burns out when heated by current.
4. Step 4. Joule heating — is used in — Incandescent light bulb. The filament is heated by current until it glows.

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