presentación1 trabajo ingles
TRANSCRIPT
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To describe thebasic elements of anelectrical circuit are
resistors,capacitors,inductors, switchesand sources. Give astarting point for
further investigationof the function andperformance ofthese devices.
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The elements of anelectrical circuitcan be divided
mainly into :Passive components- are those thatabsorb energy.
Active items - They
are those thatprovide energy.
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The resistor,inductor, capacitorand power are thebasic elements and
may exemplify theoperation of anyelectronic devicewith different
combinations ofthese elements.
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It is a passive
element. Resistor
is called on the
opposition to findthe power to cover
it. It is measured
in ohms and is
denoted by theGreekletter capital
omega ( ) .
Matter has 4 states
in relation to the
flow of electrons.
These areconductors,
semiconductors ,
resistors and
dielectrics.
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The formula that governsaccording to Ohm's law is:
Figura de resistores
They are defined by
the degree of
opposition toelectrical current
( flow of electrons ) .
And the energy
dissipatedirreversibly.
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To this charge storage property is called
capacity or capacitance. In the International
System of Units is measured in farads (F ) ,where 1 farad capacity of a condenser in
which , subject to armor a potential
difference of 1 volt , they acquire an electric
charge of 1 coulomb .
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The voltage across a capacitor
can not change abruptly over
time.
Figure inductors
where :
= dielectric constant .A = area of the plates.
d = distance betweenplates .
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It is a passive component , due to thephenomenon of self-inductance , energy
stored in a magnetic field . An inductor is
usually composed of a coil of conducting
material, typically copper wire. There are air-core inductors core or a ferrous material ,
to increase its inductance .
Inductance : Measurement of the ability of a
device to store energy in the form of a
magnetic field.
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It is an activecircuit orelectrical devicethat provides a
potentialdifference orstream reliably toother circuits canoperate.
A possibleclassification ofpower sourcesindicated :
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Ideal voltage source :
Which generates a d. d . p . between theirconstant and independent of the load terminalthat feeds . If the load resistance is infinite willsay that the source is open circuit , and zero if itwould be an absurd case, since by definition, anideal voltage source can not be shorted.
Ideal current source :
One that provides a constant and independentof the load current feed . If the load resistanceis zero say that the source is shorted , and if wewould be absurd infinite case, since by definitiona source of great strength can not be open-circuited .
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