Content protected from screenshots
GKFix.in
Current Affairs
General Knowledge
Categories
Concept Builder Quiz
About Us
Start Quiz
GKFix.in
Home
Current Affairs
General Knowledge
Categories
Concept Builder Quiz
Start Quiz
GKFix MCQ Question
Test your knowledge and learn something new
Home
Inventions
Question #6069
Back to Home
View All Inventions Questions
10 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 now-ubiquitous device was invented by Zenith engineer Eugene Polley in 1955?
6
Who is credited with inventing the printing press?
11
What item, originally called the 'Whirlwind', was invented by Ives McGaffey in 1869?
13
Which bank partnered with Piramal Finance to improve credit access in semi-urban and rural areas?
(Current Affairs)
17
What are the key demands of the Kargil Democratic Alliance and Leh Apex Body during their hunger str...
(Current Affairs)
12