Question

Read the page given below focusing on the parts that are underlined
An American inventor with over 180 patents to his credit. (16) He invented the Audion
vacuum tube that takes relatively weak electrical signals and amplifies them. (17) He is
widespread use of electronics. He is also credited with one of the principal inventions
enswer the questions given at the end as directed.
Ans.
19. A
(19.22) Comple
Each bl
Choose
Neurot
be mor
(18) that brought sound to motion picture

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Answer 1

Answer:

Ans-- Vacuum tube

Explanation: