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P1.4 Generating Electricity


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Energy
The ability to do work.
Joules
the unit of energy
turbine
fan-like blades that rotate when a fluid passes over them
generator
an electromagnet which is free to rotate within coils of wire
biofuel
fuel produced from biological waste
renewable
an energy resource which can be replenished
atomic nucleus
the centre of an atom, contains an immense amount of energy
nuclear fission
the splitting of a large, unstable atom. This releases large amounts of energy.
tides
the movement of large bodies of water such as the sea, it can be harnessed to generate electricity
non-renewable
an energy resource which once consumed cannot be replaced
solar cells
Panels which when exposed to sunlight generate a potential difference.
geothermal energy
thermal energy originally released from radioactive substances deep underground
acid rain
rain water which contains dissolved sulfur dioxide. It can damage the environment.
Carbon Capture and Storage (CCS)
capturing carbon from fossil fuel emissions and storing them underground, probably in old gas or crude oil fields.
National grid
a network of powerstations, transformers, businesses and homes that transports electricity from where it is generated to where it is needed.
Transformers
machines which either increase or decrease the voltage, without losing energy.
step-up transformer
machine which increases voltage
step-up transformer use
allows the transportation of electrical energy with less energy loss.
step-down transformer
Machine which decreases voltage
step-down transformer use
allows the use of electrical energy in the home, safely
230V
the mains voltage in the UK
start-up time
the time it takes for a power station to be built and for it to produce electricity
base load
the average demand for electricity across the country