When only carrier is transmitted antenna current observed is 8 A when it is modulated with 500 Hz sine wave antenna current becomes 9.6 A. The percentage of modulation is
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a
80 %
b
20 %
c
93.8 %
d
83.76%
answer is C.
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Detailed Solution
We know that, PtPc = 1+μ22 ⇒it2ic2 = 1+μ22 ⇒itic=1+μ22 ⇒89.6=1+μ22 ⇒μ=2225 = 0.938 In percentage, 93.8 %