Test your self by solving Physics Sample Paper CBSE 2012, given here.
1. Which physical quantity has its SI unit as
13. Define the term modulation. Name three different types of modulation used for n mess age? signal using a sinusoidal continuous carrier wave. Explain the meaning of any one of them.
14. Explain how the optical communication system offers the possibility of millions of channels with increased band width. Give an additional advantage of optical communication system over n system employing a co-axial cable.
To get complete Sample paper Click Here