In a hydraulic power plant, more electrical power can be generated if water falls from a greater height because

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Its temperature increases

A larger amount of potential energy is converted into kinetic energy

The electricity content of water increase with height

More water molecules dissociate into ions.

answer is B.

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Detailed Solution

In a hydraulic power plant, more electrical power can be generated if water falls from a greater height because a larger amount of potential energy is converted into kinetic energy.
The energy conversion process in a hydroelectric power plant is as follows:
When water is allowed to flow down, the potential energy of still water is converted into kinetic energy. The kinetic energy is then converted to electrical energy via a turbine and a generator linked to the turbine. A hydroelectric power plant can generate more electrical power if water falls from a greater height because a greater amount of potential energy is converted into kinetic energy.

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