Question
  1. What are the three basic units in communication systems? Write briefly the function of each of these.
  2. Write any three applications of the internet used in communication systems.

Answer

Three Basic units:
Transmitter:
  • Processing & transmission of message signal.
Communication channel:
  • The link for propagating the signal from transmitter to receiver.
Receiver:
  • Extracting the message signal from the signal received by it.
Three applications of internet:
  1. Internet surfing.
  2. E-mails.
  3. E-banking.
  4. E-shopping.
  5. E-booking (e-ticketing).
  6. Social networking.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Write the product of equivalent capacitances when 10 capacitors, each having a capacitance of $10 \mu F$, are connected in series and then parallel connection.
A radioactive isotope is being produced at a constant rate $\frac{\text{dN}}{\text{dt}}=\text{R}$ in an experiment. The isotope has a half-life $\text{t}_{\frac{1}2{}}.$ Show that after a time $\text{t}>>\text{t}_{\frac{1}{2}},$ the number of active nuclei will become constant. Find the value of this constant.
A short magnet is moved along the axis of a conducting loop. Show that the loop repels the magnet if the magnet is approaching the loop and attracts the magnet if it is going away from the loop.
A uniform conducting wire of length 12a and resistance R is wound up as a current carrying coil in the shape of:
  1. An equilateral triangle of side a.
  2. A square of sides a.
  3. A regular hexagon of sides a. The coil is connected to a voltage source V0. Find the magnetic moment of the coils in each case.
A monkey is climbing on a rope that goes over a smooth light pulley and supports a block of equal mass at the other end figure. Show that whatever force the monkey exerts on the rope, the monkey and the blockmove in the same direction with equal acceleration. If initially both were at rest, their separation will not change as time passes.

Distinguish between nuclear fission and fusion. Show how in both these processes energy is released. Calculate the energy release in MeV in the deuterium-tritium fusion reaction:
$^{2}_{1}\text{H} + ^{3}_{1}\text{H}\rightarrow^{4}_{2}\text{H} +\text{n}$
Using the data:
$\text{m}(^{2}_{1}\text{H}) = 2.014102 \text{u}$
$\text{m}(^{3}_{1}\text{H}) = 3.016049\text{u}$
$\text{m}(^{4}_{2}\text{H}) = 4.002603 \text{u}$
$\text{m}_{n} = 1.008665 \text{n}$
$1\text{u} = 931.5\text{MeV/c}^{2}$.
What are reflecting type of telescope ? Explain the advantages and disadvantages of reflecting telescopes as compared to refracting telescope and also give the solution.
Using Gauss's law obtain the expression for the electric field due to a uniformly charged thin spherical shell of radius R at a point outside the shell. Draw a graph showing the variation of electric field with r, for r > R and r < R.
Careful measurement of the electric field at the surface of a black box indicates that the net outward flux through the surface of the box is 8.0 × 103 Nm2 /C.
  1. What is the net charge inside the box?
  2. If the net outward flux through the surface of the box were zero, could you conclude that there were no charges inside the box? Why or Why not?
How many time constants will elapse before the charge on a capacitors falls to 0.1% of its maximum value in a discharging RC circuit?