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