CBSE Class 12 Physics Communication Systems Quiz 3

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CBSE › Class 12 › Physics › Communication Systems

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1. Communication channel consists of:

A transmission line only B optical fibre only C free space only D All of the above

2. AM is used for broadcasting because:

A it is more noise immune than other modulation system B it requires less transmitting power compare with other systems C its use avoids receiver complexity D No other modulation system can provide the necessary bandwidth faithful transmission

3. Digital signals:

A represents values as discrete steps B Do not represents values as discrete steps C represent values steps D represent random steps

4. Digital signals:

A deal with all sort of values B can use decimal system C can use binary system D (b) and (c) both

5. Increase in frequency deviation results into:

A increase in noise of FM receiver B decrease in noise of AM receiver C increase in noise of Am receiver D decrease in noise of FM receiver

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