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Home  >>  JEEMAIN and AIPMT  >>  Physics  >>  Class12  >>  Communication Systems
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Which of the following is/are false?

$\begin{array}{1 1}(1)\;\text{Over modulation gives rise to distorted and harsh sounding transmitted signals}\\(2)\; \text{Modulation index of an AM wave may vary from +1 to -1}\\(3)\;\text{In AM,all transmitted intelligence is in side bands and no signal is found in the carrier}\end{array}$ $\begin{array}{1 1}(a)\;\text{(1) only}\\(b)\;\text{(2) only}\\(c)\;\text{(1) and (2) }\\(d)\;\text{(1),(2) and (3)}\end{array}$

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Modulating index varies from 0 to 1.So only 2 is false.
Hence (b) is the correct answer.
answered Mar 14, 2014 by sreemathi.v
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