The output current of a 60 % Modulated AM generator is 1.5 A. To what value will the current rise, if the generator is additionally modulated by another audio wave of modulation index 0.7 ?

We know that , Pt = Pc1+μ22 ∴ it = ic1+μ22 ⇒ ic =  it1+μ22 =1.51+(0.6)22 =1.51.18  Now, when two signals are superimposed, then , effective modulation index μ2 = μ12 +  μ22 = (0.6)2 + (0.7)2 = 0.85  So, it = ic1+μ22 = =1.51.181+0.852 = 1.64 A