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An `AM` transmitter records an antenna current of `10.5 A`. The antenna current drops to `10 A` when only carrier is transmitted . What is the percentage modulation ? |
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Answer» Correct Answer - 0.453 Here , `I_(t) = 10.5 A and I_( c ) = 10 A , mu = ?` As ` sqrt ( 1 + (mu^(2))/(2)) = (I_(t))/(I_( c)) = ( 10.5)/( 10) = ( 21)/( 20)` `:. 1 + (mu^(2))/(2) = ( 441)/(400) =1 + (41)/( 400)` `mu^(2) = ( 82)/( 400) = 0.205` ` mu = sqrt( 0.205) = 0.453 = 45.3%` |
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