NTA Abhyas 2020
- Exam
- NTA Abhyas
- Year
- 2020
- Subject
- Physics
- Chapter
- Communication System
NTA Abhyas 2020 · Physics · Communication System
An amplitude modulated wave is as given in figure. Calculate the...
An amplitude modulated wave is as given in figure. Calculate the percentage modulation,
Options
- A
- B
- C
- DNone of These
Correct answer
A.
Step-by-step solution
From the diagram,
\text{Maximum voltage} {V }_\max = \dfrac{1 0 0}{2} = 5 0 V
\text{Maximum voltage} {V }_\min = \dfrac{2 0}{2} = 1 0 V
Percentage modulation
\mu = \dfrac{{V }_\max - {V }_\min}{{V }_\max + {V }_\min} \times 1 0 0
= \dfrac{4 0}{6 0} \times 1 0 0 = 6 6 \cdot 6 7 \text{%}
\text{Maximum voltage} {V }_\max = \dfrac{1 0 0}{2} = 5 0 V
\text{Maximum voltage} {V }_\min = \dfrac{2 0}{2} = 1 0 V
Percentage modulation
\mu = \dfrac{{V }_\max - {V }_\min}{{V }_\max + {V }_\min} \times 1 0 0
= \dfrac{4 0}{6 0} \times 1 0 0 = 6 6 \cdot 6 7 \text{%}