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PHYSICS

Physics
Modem is used mostly for ?

Connecting to internet
A modern empty memory modules
Mostly for file system
All listed here

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Physics
Choose the most appropriate answer: In which atmospheric layer are the communication satellites located?

Ionosphere
Troposphere
Stratosphere
Mesosphere

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Physics
If a carrier wave of 1000 kHz is used to carry the signal, the length of transmitting antenna will be equal to ________.

3 m
300 m
0.3 m
30 m

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Physics
Waves that are required for long distance wireless communication are

Radio waves
Infrared rays
Ultraviolet rays
Microwaves

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Physics
A television channel is characterised by

Frequency of transmitted signal
Velocity of transmitted signal
Physical dimension of television screen
Size of picture tube

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