Inventions Practice Tests
Inventions Online Tests
The Vaccum tube Multiple Choice Questions (MCQ Quiz) with Answers PDF (Vaccum Tube MCQ PDF e-Book) download to practice Inventions Tests. Learn Inventions and Inventors Multiple Choice Questions and Answers (MCQs), Vaccum Tube quiz answers PDF for online elementary school classes. The Vaccum Tube MCQ App Download: Free learning app for modern neuroscience, foot bag, post-it-note, a.c test prep for virtual online school.
The MCQ: The first vacuum tube was invented by an English electrical engineer known as; "Vaccum Tube" App Download (Free) with answers: Sir John Ambrose Fleming; Dr Raymond Lemieux; Sir Peter Williamson; Sir Samuel Morse; for online elementary school classes. Solve Inventions and Inventors Quiz Questions, download Google eBook (Free Sample) for school certificate.
In which year the first vacuum tube was invented?
The first vacuum tube was invented by an English electrical engineer known as
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