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Prva žarulja na svijetu
 Davne 1901.godine ručno je napravljena
žarulja sa ugljičnom žarnom niti.Prvi put
je zavjetlila u Kaliforniji gdje i danas
svjetli u vatrogasnoj postaji i nazvana je
The Centrennial Light.
Dijelovi žarulje
Žarna nit
Stakleni balon
izolator
Vanjski
metalni
spoj
Štedne žarulje
 Štedne žarulje "troše" manje električne
energije, imaju duži vijek trajanja, ali su
zato dosta skuplje i, zbog sadržaja žive,
opasne su po zdravlje ljudi i okoliša.
LED žarulja
 One su učinkovitije i dugotrajnije od
običnih žarulja,a imaju i ugodnu boju.
 Nedostatak im je što ne svijetle jednako
u svim smjerovima.
 Izradili: Duje Zagorac i Daniel Svalina
HVALA NA PAŽNJI!

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Istina_o_zaruljama.ppt

  • 1.
  • 2. Prva žarulja na svijetu  Davne 1901.godine ručno je napravljena žarulja sa ugljičnom žarnom niti.Prvi put je zavjetlila u Kaliforniji gdje i danas svjetli u vatrogasnoj postaji i nazvana je The Centrennial Light.
  • 3. Dijelovi žarulje Žarna nit Stakleni balon izolator Vanjski metalni spoj
  • 4. Štedne žarulje  Štedne žarulje "troše" manje električne energije, imaju duži vijek trajanja, ali su zato dosta skuplje i, zbog sadržaja žive, opasne su po zdravlje ljudi i okoliša.
  • 5. LED žarulja  One su učinkovitije i dugotrajnije od običnih žarulja,a imaju i ugodnu boju.  Nedostatak im je što ne svijetle jednako u svim smjerovima.
  • 6.  Izradili: Duje Zagorac i Daniel Svalina HVALA NA PAŽNJI!

Notas del editor

  1. Snaga ove žarulje je 4 volta, nedostatci su joj da samo 5% energije troši na svjetlost,a sve ostalo u toplinu. Thomas Alva Edison (bio je američki izumitelj i tehničar) o on se povezuje sa izumom žarulje.
  2. LED žarulje se najviše služe za rasvjetu ulica,signalne znakove,a koriste se i u TV-u