Question

In amplitude modulation, the amplitude of the carrier wave is 10 V and the amplitude of one of the side bands is 2 V. The modulation index is:

• A. 0.4
• B. 0.6
• C. 0.7
• D. 0.5

Hint:

Remember, the modulation index determines the extent of modulation and is crucial for ensuring signal quality and efficient transmission.

Answer 1

The Correct Option is A

Step 1: The modulation index \( m \) in amplitude modulation is calculated using the formula: \[ m = \frac{A_m}{A_c} \] where \( A_m \) is the amplitude of the modulation and \( A_c \) is the amplitude of the carrier wave. 
Step 2: Given that the amplitude of one of the side bands \( A_m = 2 \, {V} \) and the amplitude of the carrier wave \( A_c = 10 \, {V} \), we can calculate the modulation index as: \[ m = \frac{2}{10} = 0.2 \]