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Q.

In amplitude modulation, the carrier signal is given by C(t)=10sin(20000πt)  and modulating signal is given by  m(t)=5sin(2000πt) . The values of modulation index and Bandwidth of the modulated signal are respectively.

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a

0.1 and 200 Hz

b

0.5 and 2000 Hz

c

0.2 and 1000 Hz 

d

0.4 and 2000 Hz

answer is B.

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Detailed Solution

Modulation index μ=AmAc=510=0.5    
Band width  =2fm=2×2000π2π=2000Hz
 

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