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Q.

When were Vacuum tubes invented ?

Tags: electronics, science, home decor
Asked by Iqbal Seth, 28 Jan '13 11:33 am
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Answers (6)

1.

First invented by a British scientist named John A. Fleming, although Edison had made some dsicoveries while working on the lightbulb. The vacuum tube was improved by Lee DeForest.
Answered by LIPSIKA, 28 Jan '13 01:10 pm

 
  
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2.

Although the discovery was made of the principles for the vacuum tube around 1873 it was not put into practice until the early 1900's.
Answered by Ataur Rahman, 28 Jan '13 11:37 am

 
  
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3.

John A. Fleming,
Answered by truth exposed, 28 Jan '13 01:17 pm

 
  
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4.

1907 American inventor Lee De Forest invented it.
Answered by Quest, 28 Jan '13 12:46 pm

 
  
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5.

In 1907 American inventor Lee De Forest invented it. triodes, diodes, pentodes are some of the examples. later on they were replaced by n-p-n technology based transistors and now by integrated circuits and SMD'S.
Answered by Manoj Joshi, 28 Jan '13 11:54 am

 
  
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6.

No idea sir ji but vacuum is realy good tecnology
Answered by wenz, 28 Jan '13 11:34 am

 
  
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