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
ELECTRONIC DEVICES
Question #90708
Back to Home
View All ELECTRONIC DEVICES Questions
23 Views
Question
What was used as a cathode in vacuum tubes for electron emission?
A. Cold cathode
B. Laser source
C. Solar cell
D. Heated cathode
Check Answer
Share on Twitter
Share on Facebook
Copy Link
Related Questions
A convex lens forms an image at 30 cm when the object is at 15 cm. What is the focal length of the l...
9
What impurity is used to create a p-type semiconductor?
24
What are the two distinct energy bands in a semiconductor?
18
On which date is World Parkinson’s Day observed annually to raise awareness about the neurological...
(Current Affairs)
45
Which of the following is NOT one of the three ICT initiatives launched by the LG at Tihar Jail on 2...
(Current Affairs)
15