Related Questions

Why does the ionosphere of the Earth's atmosphere facilitate radio communication? i. The presence of ozone causes the reflection of radio waves to earth ii. Radio waves have a very long wavelength
A i only
B ii only
C both i & ii
D neither i nor ii
In a PC to telephone hookup for long distance communication, modem is connected between the telephone line and
A PC
B synchronous port
C crossover cable
D asynchronous port
E None of the above
Computers cannot communicate with each other directly over telephone lines because they use digital pulses whereas telephone lines use analog sound frequencies. What is the name of the device which permits digital to analog conversion at the start of a long distance transmission?
A Interface
B Modem
C Attenuation
D Teleprocessor
E None of the above
In a room there are six Bengali, twelve engineers and fifteen football players. Only one of them was a bengali Engineer who played Football. Two were Bengali Engineers but did not play football and two were Bengali football players and were not engineers. If there were 24 people in the room, and at least one of them were Bengali, engineer or a football player, how many were engineers and played football but not bngali?
A 1
B 9
C 6
D 3
When —— telephone invented?
A is
B had
C has been
D was
When __ the telephone invented?
A has been
B had been
C was
D is
In which decade was the telephone invented?
A 1850s
B 1860s
C 1870s
D 1880s
Telephone:Cable:Radio?
A Microphone
B Wireless
C Electricity
D Wire
Telephone : Cable : : Radio : ?
A Microphone
B Wireless
C Electricity
D Wire
Who invented the radio and wireless system?
A Dalton
B Marconi
C Einstein
D Braille

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