What was the name of the first vacuum tube invented by Lee de Forest in 1906?
A. Colossus
B. Legion
C. Audion
D. Radion
Answer
Correct Answer: C. Audion
Detailed About MCQs
Audion was the first vacuum tube invented in 1906 by Lee de Forest. It was the size of a person’s thumb and glowing red hot like a tiny electric light bulb. This bagged him the nickname as “the father of radio”.