In an amplitude modulation, a modulating signal having amplitude of X V is superimposed with a carrier signal of amplitude Y V in first case. Then, in second case, the same modulating signal is superimposed with different carrier signal of amplitude 2 YV. The ratio of modulation index in the two cases respectively will be: s

Question

In an amplitude modulation, a modulating signal having amplitude of X V is superimposed with a carrier signal of amplitude Y V in first case. Then, in second case, the same modulating signal is superimposed with different carrier signal of amplitude 2 YV. The ratio of modulation index in the two cases respectively will be: s (A) 2: 1 (B) 1: 2 (C) 1: 1 (D) 4: 1

Tardigrade Admin · Accepted Answer

Modulating Index μ= (Am/Ac) μ1 =(X/Y) μ2 =(X/2 Y) (μ1/μ2) =(2/1)

$2 : 1$

$1 : 2$

$1 : 1$

$4 : 1$

Modulating Index
$μ = \frac{A _{m}}{A _{c}}$
$μ_{1} = \frac{X}{Y}$
$μ_{2} = \frac{X}{2 Y}$
$\frac{μ _{1}}{μ _{2}} = \frac{2}{1}$

2:1

1:2

1:1

4:1

Modulating Index μ=Ac​Am​​ μ1​=YX​ μ2​=2YX​ μ2​μ1​​=12​

$2 : 1$

$1 : 2$

$1 : 1$

$4 : 1$

Modulating Index
$μ = \frac{A _{m}}{A _{c}}$
$μ_{1} = \frac{X}{Y}$
$μ_{2} = \frac{X}{2 Y}$
$\frac{μ _{1}}{μ _{2}} = \frac{2}{1}$