Question :
A) Because they can amplify the weak signals and make them strong
B) Because they can stop or allow the flow of current
C) Both of above
D) None of above
Answer : B
Why are vacuum tubes also called valves?
A) Because they can amplify the weak signals and make them strong
B) Because they can stop or allow the flow of current
C) Both of above
D) None of above
Answer : B
Description :
Related Questions - 1
Which type of computers uses the 8-bit code called EBCDIC ?
A) Minicomputers
B) Microcomputers
C) Mainframe computers
D) Super computer
Related Questions - 2
In most of the IBM PCs, the CPU, the device drivers, memory, expansion slots and active components are mounted on a single board. What is the name of the board?
A) Motherboard
B) Daughterboard
C) Breadboard
D) Fatherboard
Related Questions - 3
The two kinds of main memory are :
A) Primary and secondary
B) Random and sequential
C) ROM and RAM
D) All of above
Related Questions - 4
CD-ROM is a
A) Semiconductor memory
B) Memory register
C) Magnetic memory
D) None of above