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Signals and Transmission Systems, Class 12 Physics NCERT Solutions

1. There will be total 10 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying.

1. The characteristic impedence of a coaxial wire line is of order
 
 
 
 

Question 1 of 10

2. In which manner does current or voltage vary in an analog signal with time?
 
 
 
 

Question 2 of 10

3. If an antenna radiates electromagnetic waves from a height h, then the range d upto which the signal can be detected is given by ( R is the radius of the earth)
 
 
 
 

Question 3 of 10

4. Super high frequencies of __________ are used in Radar and Satellite Communication.
 
 
 
 

Question 4 of 10

5. The bandwidth sufficient for commercial telephonic communication:
 
 
 
 

Question 5 of 10

6. Optical communication using fibres is performed in the frequency range of
 
 
 
 

Question 6 of 10

7. Modes of communication system are classified into :
 
 
 
 

Question 7 of 10

8. If the area of a TV telecast is to be doubled, then height of transmitting antenna will have to be
 
 
 
 

Question 8 of 10

9. With the increase in frequencies more than 2 MHz, Ground wave propagation
 
 
 
 

Question 9 of 10

10. What should be the approximate height of antenna if the TV telecast is to cover a radius of 100 km?
 
 
 
 

Question 10 of 10