The diagrams below show two methods of using water to produce electricity. Summarise the information by selecting and reporting the main features, and make comparisons where relevant

The two illustrations provided demonstrate approaches in which electricity is produced from renewable sources.

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, two methods utilized to generate energy are operated simply and applied in different locations with various essential equipment. Having looked at the first given diagram, a hydroelectric dam is installed near the river where water easily flows into and is stored in the reservoir. The process begins when the gate opens to let it in. The width and angle of the penstock decide its speed and force which turns the turbine and spindle. When the spindle rotates in the generator, electricity is generated and

then

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distributed to power lines.

Also

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, the water is released into the river which ends the process. In terms of producing energy by using wave-air generation, it is apparent that

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method is applied in the ocean. Two chambers are placed at sea to take advantage of the waves. In

this

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method, when waves go into the lower chamber, the air is pushed into the upper chamber that turns turbine and spindle. As it rotates in the generator, electricity is produced. Simultaneously, the air is released from the upper chamber.