General Knowledge - Technology - Discussion
Discussion Forum : Technology - Section 2 (Q.No. 31)
31.
In which decade were the first successful diode and triode vacuum tubes invented?
Answer: Option
Explanation:
In 1904, John Ambrose Fleming invented the first practical electron tube called the 'Fleming Valve', which is a diode rectifier. In 1906, Lee de Forest invented the audion later called the triode, which provided signal amplification.
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