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electricity
Electric current
In the previous example with the pen, the charges are at rest. They don’t
move through the electrified material. This is called static electricity.
However, just as water can flow through a tube, electrons can move
through certain materials and create an electric current.
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Electric circuits
An electric current is several electrons that flow through a conductor like
water flows through a tube. This comparison is useful to understand how
electric circuit works.An electric circuit is a set of connected components through which an
electric current circulates.
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Generators
thats batteries
They are very common.
They use chemical processes to
generate the electric current. They
can be classified as low-medium
environmentally friendly, since they
contain chemicals and require
mining of materials, although
recycling helps reduce their
environmental impac
more examples
Alternators or dynamos.
They are
very common. They transform
motion into electric current. They
can be classified as medium-high
environmentally friendly, since they
are efficient but depends on the
energy source driving them.
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Receptors
In a circuit, the receptors are the components that transform electrical
energy into another type of energy like heat, light, motion or even sound.
The electrons leave the generator, taking the energy with them and move
round the circuit until they get back to the opposite terminal
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Electric quantities 
Voltage, current and resistance
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The principle of electric charge explains why objects attract or repel one
another. Electric charge is a property of all objects and is responsible for
electrical phenomena. These phenomena are caused by the electrical
forces of attraction and repulsion
Photovoltaic solar cells. They are
increasingly more common. They
can be classified as very
ecological as they take energy
from sunlight with no emissions
during use.
Hydrogen cells. They produce
energy from oxygen in the air and
hydrogen. They are not yet
common as they are still in
development. They are potentially
very ecological as they only
produce water as waste.
● Light
Series connection
. Parallel connection
Environmental impact of electricity use
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