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Q.

An amplitude modulated wave is represented by the expression vm=51+0.4cos6280tsin211×104t  volts. The minimum and maximum amplitudes of the amplitude modulated wave are, respectively

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a

3V,7V

b

3V, 5V

c

5V, 8V

d

32V,5V

answer is A.

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Detailed Solution

vm=51+0.4cos6280tsin211×104t  Given : vc=5 and μ=0.4   Minimum amplitude  =vc1-μ=51−0.4=3Maximum amplitude  =vc1+μ=51+0.4=7No correct options
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