In many areas electricity is produced by big generators within dams. What function does large volumes of moving water have in generating electricity? HELP PLEASE

I know that’s so late but...

To increase the volume of moving water, impoundments or dams are used to collect the water. An opening in the dam uses gravity to drop water down a pipe called a penstock. The moving water causes the turbine to spin, which causes magnets inside a generator to rotate and create electricity.

So it helps move the magnet:)

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