Inventions on General Knowledge related Questions and Answers


Question :   In which decade were the first successful diode and triode vacuum tubes invented?
1. 1800s
2. 1880s
3. 1890s
4. 1900s
Answer :   4 - 1900s  

* Be the First to Post a Comment.

Submit comment :


Captcha Image
Reload

Ask Question

Captcha Image
Reload

Note : Name and Email never shown.





Subscribe


Become a part of EducationForever. Subscribe to our FREE Newsletter