Please wait...
1800-212-7858 (Toll Free)
9:00am - 8:00pm IST all days

or

Thanks, You will receive a call shortly.
Customer Support

You are very important to us

For any content/service related issues please contact on this toll free number

022-62211530

Mon to Sat - 11 AM to 8 PM

Ask Signals And Transmission Systems question free ×
  • CBSE×
  • Class 12 Science×
  • Physics×
  • Communication Systems×
  • Signals And Transmission Systems×

Signals And Transmission Systems Free Doubts and Solutions

CBSE - XII Science - Physics - Communication Systems

(a)  Distinguish between ‘Analog’ and ‘Digital’ forms of communication. (b)  Explain briefly two commonly used applications of the ‘Internet’.

Asked by Topperlearning User 8th July 2015, 12:54 PM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

(b) What is the minimum number of satellites that enables a Global Positioning System (GPS) receiver to determine one’s longitude/latitude position, i.e., to make a 2D position fix.

Asked by Malavika Umesh 26th February 2015, 10:21 AM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

What is the difference between Transmitter and Transducer. Explain with example ?? 

Asked by Shivansh Rawat 24th November 2014, 5:46 PM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

a) Distinguish between 'Analog and Digital signals'. b) Mention the function of any two of the following used in communication system: (i) Transducer (ii) Repeater (iii) transmitter (iv) Bandpass Filter

Asked by Topperlearning User 10th July 2014, 5:54 PM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

What is a digital signal?Write two advantages of digital communication. Give any one difference between Fax and E-mail systems of communication.

Asked by Topperlearning User 9th July 2014, 10:55 AM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

Draw a schematic diagram showing the (i) ground wave (ii) sky wave and (iii) space wave propagation modes for em waves. Write the frequency range for each of the following: (i) Standard AM broadcast (ii) Television (iii) Satellite communication

Asked by Topperlearning User 8th July 2014, 9:03 AM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

What is space wave propagation? Give two examples of communication system which use space wave mode. A TV tower is 80 m tall. Calculate the maximum distance upto which the signal transmitted from the tower can be received.

Asked by Topperlearning User 8th July 2014, 8:42 AM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

On a particular day, the maximum frequency reflected from the ionosphere is 10 MHz. On another day, it was found to decrease to 8 MHz. Calculate the ratio of the maximum electron densities of the ionosphere on the two days.

Asked by Topperlearning User 8th July 2014, 8:22 AM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

Briefly explain the ground wave propagation of radio waves.

Asked by Topperlearning User 8th July 2014, 8:07 AM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

The figure shows the block diagram of a receiver: (a) Identify 'X' and 'Y' (b) Write their functions.

Asked by Topperlearning User 7th July 2014, 3:26 PM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

Explain the function of a repeater in a communication system.

Asked by Topperlearning User 7th July 2014, 3:15 PM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

Why cannot the (i) ground waves (ii) space waves and (iii) sky waves be sustained for long distance communication beyond 10 to 20 MHz ? What is meant by critical frequency  for sky wave propagation ? Write an expression for the critical frequency in terms of the maximum electron density of the ionosphere. 

Asked by Topperlearning User 7th July 2014, 1:37 PM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

Which mode of propagation is used by short wave broadcast services having frequencies range from a few MHz upto 3 MHz? What do you understand by space wave propagation?Why ground wave propagation is not suitable for high frequency?

Asked by Topperlearning User 7th July 2014, 1:21 PM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

Why are sky waves reflected back from the ionosphere?

Asked by Topperlearning User 7th July 2014, 12:56 PM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

What is a band pass filter?

Asked by Topperlearning User 7th July 2014, 12:37 PM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

Write the expression of a TV station, area and the population covered by the transmission.

Asked by Topperlearning User 7th July 2014, 12:34 PM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

Sky waves are not used in transmitting TV signals. Why? How can the range of TV signals be increased?

Asked by Topperlearning User 7th July 2014, 12:24 PM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

What do you mean by bandwidth of a signal? How much bandwidth is considered adequate for (i) speech signal (ii) music signal (iii) video and TV signals?

Asked by Topperlearning User 7th July 2014, 9:22 AM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

What do you understand by line communication and space communication? Give example.

Asked by Topperlearning User 7th July 2014, 9:13 AM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

What do you mean by point to point communication and broadcast? Give examples.

Asked by Topperlearning User 3rd July 2014, 3:22 PM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

What do you mean by analog and digital communication system?

Asked by Topperlearning User 3rd July 2014, 3:12 PM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

Briefly describe the three basic parts of communication system.

Asked by Topperlearning User 3rd July 2014, 3:08 PM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

can u plz elaborate it sir/mam, that why does gravitational force bind d heavy objects like sun and planets...as i didnt understand it completely from ua last ans...

Asked by Kalyanrao Chavan 1st July 2014, 2:16 PM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

even-though ,,gravitational force is very weak force ,how does it still bind all d planets,moon n d heavy sun?

Asked by Kalyanrao Chavan 30th June 2014, 12:56 PM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

Name the type of communication in which the signal is a discrete and binary version of the message or information.

Asked by Topperlearning User 4th June 2014, 1:23 PM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!

CBSE - XII Science - Physics - Communication Systems

Why do long distance radio broadcast use short wave bands?

Asked by Topperlearning User 4th June 2014, 1:23 PM
Answered by Expert

Answer this question

×
Your answer has been posted successfully!