Electrical Conductors and Insulators
•
A conductor is an object or type of material that allows the flow
of charge (electrical current) in one or more directions.
•
Materials made of metal are common electrical conductors.
•
Electrical current is generated by the flow of negatively charged
electrons, positively charged holes, and positive or negative ions
in some cases.
•
Conduction materials
include
metals
,
electrolytes
,
superconductors
,
semiconductors
,
plas
mas
and some nonmetallic conductors such
as
graphite
and
Conductive polymers
.
•
Copper
has a high
conductivity
. Copper, Silver, Gold, Aluminum are
the examples of good conductor.
•
An electrical insulator is a material whose internal
electric
charges
do not flow freely; very little
electric current
will flow
through it under the influence of an
electric field
.
•
This contrasts with other materials,
semiconductors
and
conductors
,
which conduct electric current more easily.
•
The property that distinguishes an insulator is its
resistivity
;
insulators have higher resistivity than semiconductors or conductors.
•
Electrical insulation is the absence of
electrical conduction
.
•
Wood, Plastic, Rubber, Wool, Paper, Wax, Glass, Ebonite are the
examples of insulators.
Electrical conductors like metals allow the flow of charge, while insulators like wood and plastic impede the flow. Copper, silver, and aluminum are examples of good conductors, with high conductivity. Insulators have high resistivity, preventing the easy flow of electric current. Learn about the properties and examples of both conductors and insulators in electrical systems.
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Presentation Transcript
CONDUCTORS A conductor is an object or type of material that allows the flow of charge (electrical current) in one or more directions. Materials made of metal are common electrical conductors. Electrical current is generated by the flow of negatively charged electrons, positively charged holes, and positive or negative ions in some cases. Conduction materials include metals, electrolytes, superconductors, semiconductors, plas mas and some nonmetallic conductors such as graphite and Conductive polymers. Copper has a high conductivity. Copper, Silver, Gold, Aluminum are the examples of good conductor.
INSULATORS An electrical insulator is a material whose internal electric charges do not flow freely; very little electric current will flow through it under the influence of an electric field. This contrasts with other materials, semiconductors and conductors, which conduct electric current more easily. The property that distinguishes an insulator is its resistivity; insulators have higher resistivity than semiconductors or conductors. Electrical insulation is the absence of electrical conduction. Wood, Plastic, Rubber, Wool, Paper, Wax, Glass, Ebonite are the examples of insulators.
