When vacuum tube was invented by John Ambrose Fleming..? A) 1900 B) 1902 C) 1904 D) 1906 Related MCQs: Vacuum Tube pertains …… to Generation of Computer? John Eckert and John Mauchly designed ENIAC in year …? Cathode Ray Tube is a form of? Who filled the power vacuum, when President Zia-ul-Haq passed away?