Q669
Which of the following inventions were done by Thomas Alva Edison?
A.
Incandescent lamp
B.
Phonograph C (Gramophone) and microphone
C.
Carbon telephone transmitters
D.
All of the above
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
Incandescent lamp, Phonograph C (Gramophone) and microphone and Carbon telephone transmitters inventions were done by Thomas Alva Edison. Thomas Alva Edison was an American inventor and businessman who has been described as America's greatest inventor. He developed many devices in fields such as electric power generation, mass communication, sound recording, and motion pictures.