Why are vacuum tubes also called valves?
Because they can amplify the weak signals and make them strong
Because they can stop or allow the flow of current
Both of above
None of above
Answer : B
Free Online Test
View More Related Question
1) One computer that is not considered a portable is
2) CD-ROM is a
3) Bit map terminal
support display containing multiple window
require considerable amount of video RAM
requires tremendous amount of copying and hence low performance
all of above
View Answer
4) Chief component of first generation computer was
5) Each set of Napier’s bones consisted of ______ rods.
