Let's understand how a simple tidal power plant works:

1. **Step 1: Build a Barrage:** First, a large wall, called a barrage, is built across a bay or river mouth where there are strong tides. Think of it like building a dam for a big lake.
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2. **Step 2: Gates Open (High Tide):** When the tide rises (high tide), the water level on the ocean side becomes higher than the water level inside the barrage. Gates in the barrage open, allowing a huge amount of seawater to flow into the basin behind the barrage.
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3. **Step 3: Gates Close:** Once the water level inside the basin is high, the gates are closed. The water is now trapped inside.
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4. **Step 4: Gates Open (Low Tide):** After some hours, the tide goes out (low tide), and the water level on the ocean side drops significantly. The water level inside the basin is now much higher than the ocean side.
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5. **Step 5: Water Flows Out (Generates Power):** The gates are opened again, allowing the trapped water to rush out from the basin back into the ocean. This rushing water flows through special turbines, which are like giant underwater fans.
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6. **Step 6: Turbines Spin & Electricity is Made:** As the water pushes the turbine blades, the turbines spin. These spinning turbines are connected to generators that convert the motion into electricity.
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7. **Step 7: Power for Homes:** This electricity is then sent through power lines to light up homes, schools, and offices in nearby cities, just like the electricity from your local power station.

**Result:** The constant rise and fall of tides provide a predictable way to generate clean electricity.