Question
- What are the three basic units in communication systems? Write briefly the function of each of these.
- 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:
-
Internet surfing.
-
E-mails.
-
E-banking.
-
E-shopping.
-
E-booking (e-ticketing).
-
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.
Explore more
Similar questions
A sphere of mass 20kg is suspended by a metal wire of unstretched length 4m and diameter 1mm. When in equilibrium, there is a clear gap of 2mm between the sphere and the floor. The sphere is gently pushed aside so that the wire makes an angle $\theta$ with the vertical and is released. Find the maximum value of $\theta$ so that the sphere does not rub the floor. Young's modulus of the metal of the wire is $ 2.0 \times 10^{11}N/m^2$. Make appropriate approximations.
→Find the equivalent resistance between the terminals $A$ and $B$ in the network shown in Figure. Given each resistor $R$ is $10 \Omega$.
→Obtain the resonant frequency and Q-factor of a series LCR circuit with L = 3.0H, C = 27μF, and R = 7.4Ω. It is desired to improve the sharpness of the resonance of the circuit by reducing its ‘full width at half maximum’ by a factor of 2. Suggest a suitable way.
Two identical tuning forks vibrating at the same frequency 256Hz are kept fixed at some distance apart. A listener runs between the forks at a speed of 3.0m/s so that he approaches one tuning fork and recedes from the other figure. Find the beat frequency observed by the listener. Speed of sound in air = 332ms/s.
The electric field components in Fig. $1.24$ are $E_x=\alpha x^{1 / 2}, E_y=E_z=0$, in which $\alpha=800 N / C m ^{1 / 2}$. Calculate $(a)$ the flux through the cube, and$ (b)$ the charge within the cube. Assume that $a=0.1 m$.
→Prove that the force acting on a current-carrying wire, joining two fixed points a and b in a uniform magnetic field, is independent of the shape of the wire.
Define nuclear fission reaction.
Explain threshold frequency and stopping potential.###Define the following with respect to photoelectric effect :
(i) Work function (ii) Stopping potential
(i) Work function (ii) Stopping potential
If one of the two electrons of a $H_2$ molecule is removed, we get a hydrogen molecular ion $\text{H}^+_2.$ In the ground state of an $\text{H}^+_2,$ the two protons are separated by roughly 1.5 Å, and the electron is roughly 1 Å from each proton. Determine the potential energy of the system. Specify your choice of the zero of potential energy.
→The potential barrier existing across an unbiased p-n. junction is 0·2 volt. What minimum kinetic energy a hole should have to diffuse from the p-side to the n-side if,
- The junction is unbiased.
- The junction is forwardbiased at 0.1 volt.
- The junction is reverse-biased at 0.1 volt?