Incandescent light bulb - Quiz
A) Chemical combustion B) Nuclear fusion C) Gas discharge D) Joule heating
A) To prevent oxidation B) To increase brightness C) To cool the filament D) To generate electricity
A) Around 15% B) More than 50% C) Less than 5% D) About 25%
A) Joseph Swan B) Thomas Edison C) Humphry Davy D) James Bowman Lindsay
A) It required toxic gases B) It was not bright or long-lasting C) It was too expensive to produce D) It frequently caused electrical fires
A) 1880 B) 1802 C) 1840 D) 1860
A) Using neon gas for illumination B) Using tungsten filaments C) Using phosphorus vapors as a getter D) Creating a better glass seal
A) Tungsten metal B) Platinum wire C) Cotton thread D) Carbonized Japanese bamboo
A) Savoy Theatre B) Royal Institution C) Mosley Street Opera House D) Château de Blois
A) They were too fragile B) They required specialized glass C) They required too little electricity D) They were too bright and emitted carbon monoxide
A) Joseph Swan B) Thomas Edison C) Frederick de Moleyns D) Alexander Lodygin
A) Columbia B) Savoy C) Titanic D) Jumbo
A) Platinum wire B) Carbon rod C) Tungsten strip D) A ceramic globar
A) By using a thicker glass bulb B) By adding nitrogen gas C) By using a platinum filament D) With improved vacuum pump processing
A) 100 lm/W B) 60 lm/W C) 16 lm/W D) 13 lm/W |
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