Question

In which decade were the first successful diode and triode vacuum tubes invented?
A.1800s
B.1880s
C.1890s
D.1900s

Answer 1

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⭐⭐ B) .1880s ⭐⭐

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Answer 2

D.1900s.

John Ambrose Fleming is credited with the discovery of diode and triode vacuum tubes.

Both the devices are very elemental in electronics as on date and their discovery has helped in the development of many types of electronic equipment that we use today.

A diode consists of two electrodes- anode and cathode, whereas a triode also has a grid in addition to the two electrodes.