Content protected from screenshots
GKFix.in
General Knowledge
Categories
Concept Builder Quiz
About Us
Start Quiz
Home
My Profile
General Knowledge
Categories
Concept Builder
Start Quiz
Logout
GKFix MCQ Question
Test your knowledge and learn something new
Home
Inventions
Question #6069
Back to Home
View All Inventions Questions
44 Views
Question
In which decade were the first successful diode and triode vacuum tubes invented?
A. 1800s
B. 1880s
C. 1890s
D. 1900s
Check Answer
Share on Twitter
Share on Facebook
Copy Link
Related Questions
What treat was invented by 11-year-old Frank Epperson in 1905?
43
The ELECTRIC BATTERY, who's charged with inventing this one?
64
Where was the yo-yo invented?
52