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Question
Which of the following materials was/were used by Edison as filaments in his electric bulb?
Which of the following materials was/were used by Edison as filaments in his electric bulb?
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Solution
The correct options are
B Bamboo
C Cotton
D Platinum
T. A. Edison initially used platinum filament in his bulb and it had worked continuously for 8 minutes. Then he used cotton coated with soot as the filament which worked for a longer time of 45 minutes. Finally after some attempts, he used bamboo strip as the filament. Surprisingly, it worked for a number of days.
B Bamboo
C Cotton
D Platinum
T. A. Edison initially used platinum filament in his bulb and it had worked continuously for 8 minutes. Then he used cotton coated with soot as the filament which worked for a longer time of 45 minutes. Finally after some attempts, he used bamboo strip as the filament. Surprisingly, it worked for a number of days.
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