Physics - General Knowledge Questions and Answers

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Which of the following is the fastest communication channel?

Microwave

Optical fiber

Radio wave

All are operating at nearly the same propagation speed

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The layer of atmosphere used for radio-wave transmission is

Chromosphere

Troposphere

Ionosphere

Stratosphere

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What frequency range is the high frequency band?

3 kHz

3 to 30 MHz

30 to 300 MHz

10 GHz

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In an optical fibre the signal is transmitted

In a straight line path

In a curved path

Due to total internal reflection

Due to refraction

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The Capacity of a communication channel is measured in

Band rate

Band width

Data flow

Bit capacity

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The frequency used in TV and radar system lies in

VHF

SHF

UHF

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Which among the following waves is used for communication by artificial satellites ?

Micro waves

Radio waves

A. M.

Frequency of 1016 series

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Modem is used mostly for ?

A modern empty memory modules

Connecting to internet

Mostly for file system

All the above

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

Stratosphere

Ionosphere

Troposphere

Mesosphere