Dam spillway and electric motor: what they have in common

1. Step 1. Dam spillway — is part of — Dam. It lets floodwater through.
2. Step 2. Dam — is part of — Hydroelectric power station. The dam creates the head of water.
3. Step 3. Hydroelectric power station — has part — Electric generator. Generators.
4. Step 4. Electric generator — works like — Electric motor. A generator and a motor are built the same way and differ only in the direction of energy conversion.

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