Generation of Electricity (5)

Science

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Mechanisms for generating electricity in hydroelectric power stations

High dam stores water > Water flows from high level to low level > Flow of water rotates turbine > Generator produces electricity

Changes in the form of energy in hydroelectric power stations

Gravitational potential energy > Kinetic energy > Electrical energy

Mechanism for generating electricity at a power station that uses ang energy

Moving air or wind > Wind moves blades > Blades rotate turbine > Generator produces electricity

Changes in the form of energy in power stations that use wind energy

Kinetic energy > Electrical energy

Mechanisms for generating electricity in power stations that use nuclear fuel

Nuclear reaction > Boiling water produces steam > Steam rotates the turbine > Generator produces electricity

Energy change in power station using nuclear fuel

Nuclear energy > Heat energy > Kinetic energy > Electrical energy

Mechanisms for generating electricity in power stations that use biomass

Biomass produces methane > Boiling water produces steam > Steam rotates the turbine > Generator produces electricity

Energy change at power station using biomass

Chemical energy > Heat energy > Kinetic energy > Electrical energy

Definition of direct current

Is an electric current that flows in one direction only

Examples of devices that use direct current (1)

Torchlight

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