Communication Systems Class 12 MCQs Questions with Answers

1. Which is more advantageous?

2. AM is used for broadcasting because:

3. Broadcasting antenna are generally:

4.  
Which of the following is the reason for signal distortion?

5.  
The term used “to collect the information about an object and a place without physical contact” is called :

6. Name the man who was first to place his foot on the moon and in which year:

7. The audio frequencies range from:

8. Communication channel consists of:

9. The space waves which are affected seriously by atmospheric conditions are:

10.  
The waves that are bent down by the ionosphere are

11. The length of a half wave dipole at 30 mega-hertz is:

12. The term used “to collect the information about an object and a place without physical contact” is called :

13. In space communication, the sound waves can be sent from one place to another:

14. In modulation process, radio frequency wave is termed as

15.  
What is the function of the receiver?

16. Increase in frequency deviation results into:

17.  
Wave obtained on superimposition of audible frequency e.m. wave is known as

18.  
The frequency band used in the downlink of satellite communication is

19.  
The modulation index in amplitude modulation is:

20. Which of the following is not transducer?