MOVEMENT OF ELECTRONS THROUGH AN ELECTRICAL CABLE IS SLOW AND DISORDERLY
JOULE EFFECT : E=I2 X R X t
LIGHT
LIGHT-EMITTING DIODES
Has layers of semiconductor materials
when electricity is applied to the led
then the electrons cross over into the active layer
FLUORESCENT BULBS
It has a metalic fillament, when
the electric current
passes through the filament electrons
are emited into the
inert gas
INCASDECENT BULBS
electric current passes through
the metalic filament
of the bulb
ELECTROMAGNETIC EFFECTS
Michael Faraday noticed
that electricity could be
generated by using a magnet
anelectrical conductor this allows
us tu build dynamos and
alternators
SOUND
We can transform sound into electric current using
electromagnetical devices such us bells, some of these de
vicesare based on the piezoelectric effect
