Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Physics Expert

problem 1: Describe the given terms:

a) Ground waves.
b) Space waves.
c) Sky waves.

problem 2: Why can’t the:

a) Ground waves
b) Space waves and
c) Sky waves are sustained for long distance communication beyond 10 to 20 MHz?

problem 3: What do you mean by the term critical frequency for sky wave propagation? prepare down an expression for the critical frequency in terms of the maximum electron density of the ionosphere. Determine the range of variation of frequency for this critical frequency?

problem 4: Define the word ‘critical frequency’ in relation to sky wave propagation of electro-magnetic waves. On a specific day, the maximum frequency reflected from the ionosphere is 10MHz. On another day, it was found to reduce to 8 MHz. Compute the ratio of the maximum electron densities of the ionosphere on the two days.

problem 5: Draw a block diagram of a simple amplitude modulation, describing in brief how amplitude modulation is accomplished.

problem 6: What does the method of detection of amplitude wave mean? The amplitude modulated carrier wave of angular frequency ωc, (ωc - ωm and ωc + ωm) and (ωc - ωm), where ωm is the angular frequency of the modulating signal. Describe, in brief, with the help of a block diagram the necessary details of a simple method used for ‘detecting’ the modulating signal from this modulated carrier wave.

problem 7: A transmitting antenna at the top of a tower has a height 32 m and the height of the receiving antenna is 50 m. Find out the maximum distance between them for satisfactory communication in LOS mode? Given that radius of earth is 6.4 × 106 m.

Physics, Academics

  • Category:- Physics
  • Reference No.:- M92881
  • Price:- $70

Priced at Now at $70, Verified Solution

Have any Question? 


Related Questions in Physics

A using a calculator or computer sketch the graph of y 2ex

(a) Using a calculator or computer, sketch the graph of y = 2ex + 5e-x for -3 ≤ x ≤ 3, 0 ≤ y ≤ 20. Observe that it looks like the graph of y = cosh x. Approximately where is its minimum? (b) Show algebraically that y = 2 ...

A light ray in air is incident on an unknown substance with

A light ray in air is incident on an unknown substance with an incidence angle of 39 degrees. If the light ray is refracted at an angle 20 degrees in the substance, what is the index of refraction of the substance?

In the circuit the capacitor is fully charged when switch s

In the circuit, the capacitor is fully charged when switch S is closed. Calculate the time needed for the potential energy stored by the circuit to be equally distributed between the capacitor and inductor. The capacitan ...

A find the tangent line approximation to cos x at x pi4b

(a) Find the tangent line approximation to cos x at x = π/4. (b) Use a graph to explain how you know whether the tangent line approximation is an under- or overestimate for 0 ≤ x ≤ π/2. (c) To one decimal place, estimate ...

Question from nanotechnology understanding small systemsthe

Question from: Nanotechnology: Understanding Small Systems The random motion of molecules within a cell is driven by energy from heat. a. At what temperature do most cells prefer to live? b. The calorie is a unit of ener ...

Light of frequency 70times1014nbsphz is directed on a

Light of frequency 7.0×10 14  Hz is directed on a particular metal surface. An energy of 4.0 × 10 -19  J = w  is required to remove an electron from the surface of the metal. a) Find the maximum KE of the emitted electro ...

1 what is the constant of proportionality2 confirm that the

1. What is the constant of proportionality? 2. Confirm that the above sum-product algorithm does compute P(t n =t| y)

What is the capacity of the axon of a spiking neuron viewed

What is the capacity of the axon of a spiking neuron, viewed as a communication channel, in bits per second? [See MacKay and McCulloch (1952) for an early publication on this topic.] Multiply by the number of axons in th ...

1 why are the valence electrons the most important on

1. Why are the valence electrons the most important on influencing the electrical properties of silicon? Why are the core electrons not as important? Why are the core electrons important to distinguish Si, Gs, GaAs and o ...

In april 1991 the economist carried an article18 which said

In April 1991, the Economist carried an article18 which said: Suddenly, everywhere, it is not the rate of change of things that matters, it is the rate of change of rates of change. Nobody cares much about inflation; onl ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro