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. $4: 1$

Answer 1

Answer: (A)

$2: 1$

Answer 2

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