mobile communication quiz 1

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unit 1

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Rekha Mani

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mobile communication quiz 1


Froggy Jumps mobile communication quiz 1Versión en línea unit 1 por Rekha Mani 1 What is the term used to describe the bouncing back of radio waves when they hit large objects? a •Reflection b •Absorption c •Diffraction 2 What is the primary characteristic of Line of Sight Propagation in communication? a •Ability to penetrate obstacles effectively b •Reliance on sky wave propagation c •Direct visual path between transmitter and receiver 3 What is the frequency range for radio waves within the electromagnetic spectrum? • a Between 300 and 600 GHz b Below 300 GHz c Above 300 GHz 4 What is the term used to describe the dispersion of radio waves in multiple directions when they encounter small objects or irregular surfaces? a Refraction b Reflection c Scattering 5 What is the approximate speed of light ? a 3x10^8 meters per second b 3x10^9 meters per second c 3x10^7 meters per second 6 What is another term for ground wave propagation? a Ionosphereic Propagation b Surface Wave Propagation c Sky wave Propagation 7 Which of the following best describes multipath fading? a Signal loss due to distance from transmitter b Interference caused by overlapping frequency channels c Signal variation due to multiple paths between transmitter and receiver 8 What does the Two-Ray Ground Reflection model account for in signal propagation? a Only direct line-of-sight b Direct path and reflected path from the ground c Multiple scattered paths 9 In the Two-Ray Ground model, at large distances, the received power: a Increases linearly with distance b Falls off proportionally to the square of the distance c Falls off proportionally to the fourth power of the distance 10 Line-of-sight propagation is most effective when: a Signal travels through buildings and obstacles b Transmitter and receiver are within visual range and unobstructed c Reflected signals are stronger than direct signals 11 Line-of-sight communication is commonly used in: a Fiber optic systems b Underground cable networks c Satellite and microwave links 12 What causes Doppler shift in fast fading? a Refraction in ionosphere b Movement between transmitter and receiver c Increase in signal strength 13 In two ray Ground Reflection model the Received power is a Directly Proportional to Transmitted power b Inversely proportional to 4th power of distance. c Both a and b are correct 14 Which of the following is not a characteristic of radio waves? a Frequency ranges from 3 kHz to 300 GHz b Cannot penetrate buildings c Easy to generate 15 Fading refers to: a Change in received signal strength over time or space b Increase in transmitter power c Sudden change in antenna angle 16 Which term refers to bending of radio waves when passing through different media? a Reflection b Diffusion c Refraction

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Froggy Jumps

mobile communication quiz 1Versión en línea

por Rekha Mani

What is the term used to describe the bouncing back of radio waves when they hit large objects?

What is the primary characteristic of Line of Sight Propagation in communication?

What is the frequency range for radio waves within the electromagnetic spectrum? •

What is the term used to describe the dispersion of radio waves in multiple directions when they encounter small objects or irregular surfaces?

What is the approximate speed of light ?

What is another term for ground wave propagation?

Which of the following best describes multipath fading?

What does the Two-Ray Ground Reflection model account for in signal propagation?

In the Two-Ray Ground model, at large distances, the received power:

Line-of-sight propagation is most effective when:

Line-of-sight communication is commonly used in:

What causes Doppler shift in fast fading?

In two ray Ground Reflection model the Received power is

Which of the following is not a characteristic of radio waves?

Fading refers to:

Which term refers to bending of radio waves when passing through different media?